Concrete Structures Subjected to Impact and Blast Loadings and Their Combinations

Concrete Structures Subjected to Impact and Blast Loadings and Their Combinations

Author: Chunwei Zhang

Publisher: CRC Press

Published: 2022-05-08

Total Pages: 421

ISBN-13: 1000572951

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Although much research focuses on investigating the responses of reinforced concrete (RC) structures under sole impact or blast loads, the responses of RC structures under a combination of impact and blast loads currently represent a gap in our knowledge. The combined actions of impact and blast loadings may be applied to RC structures during accidental or intentional collision of vessels, vehicles, etc., carrying explosive materials. A comprehensive study on the vulnerability of various structural members is carried out using finite element (FE) simulations under combination of impact and blast loads with the variations of various loading- and structural-related parameters and key parameters. This book introduces various structural analysis approaches for concrete structures when subjected to extreme loads such as impact and blast loadings. The theory of the combinations of impact and blast loads is proposed that can provide primary insights to the specific readers to develop new ideas in impact and blast engineering, including combined actions of extreme loads arising from real-world intentional or accidental events. This book will be of value to students (undergraduate or postgraduate), engineers, and researchers in structural and civil engineering, and specifically, those who are studying and investigating the performances of concrete structures under extreme loads.


Book Synopsis Concrete Structures Subjected to Impact and Blast Loadings and Their Combinations by : Chunwei Zhang

Download or read book Concrete Structures Subjected to Impact and Blast Loadings and Their Combinations written by Chunwei Zhang and published by CRC Press. This book was released on 2022-05-08 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although much research focuses on investigating the responses of reinforced concrete (RC) structures under sole impact or blast loads, the responses of RC structures under a combination of impact and blast loads currently represent a gap in our knowledge. The combined actions of impact and blast loadings may be applied to RC structures during accidental or intentional collision of vessels, vehicles, etc., carrying explosive materials. A comprehensive study on the vulnerability of various structural members is carried out using finite element (FE) simulations under combination of impact and blast loads with the variations of various loading- and structural-related parameters and key parameters. This book introduces various structural analysis approaches for concrete structures when subjected to extreme loads such as impact and blast loadings. The theory of the combinations of impact and blast loads is proposed that can provide primary insights to the specific readers to develop new ideas in impact and blast engineering, including combined actions of extreme loads arising from real-world intentional or accidental events. This book will be of value to students (undergraduate or postgraduate), engineers, and researchers in structural and civil engineering, and specifically, those who are studying and investigating the performances of concrete structures under extreme loads.

Behaviour and Modelling of Reinforced Concrete Structures Subjected to Impact Loads

Behaviour and Modelling of Reinforced Concrete Structures Subjected to Impact Loads

Author: Selcuk Saatci

Publisher:

Published: 2007

Total Pages: 576

ISBN-13:

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The analysis and design of reinforced concrete (RC) structures against extreme loads, such as earthquakes, blasts, and impacts, has been an objective of many researchers and designers. As a result of recently elevated terror threat levels in the world, demand for the impact resistant design of buildings has increased. Numerous studies have been conducted to-date toward understanding and developing methodologies predicting the behaviour of RC structures under impact loads. However, the lack of a complete understanding of shear behaviour under high dynamic conditions hindered the efforts for accurate prediction of impact behaviour, since severe shear mechanisms may dominate the behaviour of RC structures when subjected to impact loads. This current study aimed to apply one of the more successful methods of static reinforced concrete shear analysis, the Modified Compression Field Theory (MCFT), to the analysis of dynamic loads, and thus, develop an efficient and reliable tool for impact analysis of RC structures. A two-dimensional nonlinear finite element analysis program for reinforced concrete, VecTor2, developed previously at the University of Toronto for static loads, was modified to include the consideration of dynamic loads, including impacts. VecTor2 uses the MCFT for its computational methodology, along with a wide array of material and behavioural models for reinforced concrete. To verify the performance of VecTor2 and its computational methodology under impact loads, an experimental program was also undertaken to provide data for corroboration. Eight reinforced concrete beam specimens, four pairs, were tested under free falling drop-weights, impacting the specimens at the mid-span. All specimens had identical longitudinal reinforcement, but varying shear reinforcement ratio, intended to investigate the effects of shear capacity on the impact behaviour. A total of 20 tests were conducted, including multiple tests on each specimen. The test results showed that the shear characteristics of the specimens played an important role in their overall behaviour. All specimens, regardless of their shear capacity, developed severe diagonal shear cracks, forming a shear-plug under the impact point. The VecTor2 analyses of the test specimens were satisfactory in predicting damage levels, and maximum and residual displacements. The methodology employed by VecTor2, based on the MCFT, proved to be successful in predicting the shear-dominant behaviour of the specimens under impact.


Book Synopsis Behaviour and Modelling of Reinforced Concrete Structures Subjected to Impact Loads by : Selcuk Saatci

Download or read book Behaviour and Modelling of Reinforced Concrete Structures Subjected to Impact Loads written by Selcuk Saatci and published by . This book was released on 2007 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis and design of reinforced concrete (RC) structures against extreme loads, such as earthquakes, blasts, and impacts, has been an objective of many researchers and designers. As a result of recently elevated terror threat levels in the world, demand for the impact resistant design of buildings has increased. Numerous studies have been conducted to-date toward understanding and developing methodologies predicting the behaviour of RC structures under impact loads. However, the lack of a complete understanding of shear behaviour under high dynamic conditions hindered the efforts for accurate prediction of impact behaviour, since severe shear mechanisms may dominate the behaviour of RC structures when subjected to impact loads. This current study aimed to apply one of the more successful methods of static reinforced concrete shear analysis, the Modified Compression Field Theory (MCFT), to the analysis of dynamic loads, and thus, develop an efficient and reliable tool for impact analysis of RC structures. A two-dimensional nonlinear finite element analysis program for reinforced concrete, VecTor2, developed previously at the University of Toronto for static loads, was modified to include the consideration of dynamic loads, including impacts. VecTor2 uses the MCFT for its computational methodology, along with a wide array of material and behavioural models for reinforced concrete. To verify the performance of VecTor2 and its computational methodology under impact loads, an experimental program was also undertaken to provide data for corroboration. Eight reinforced concrete beam specimens, four pairs, were tested under free falling drop-weights, impacting the specimens at the mid-span. All specimens had identical longitudinal reinforcement, but varying shear reinforcement ratio, intended to investigate the effects of shear capacity on the impact behaviour. A total of 20 tests were conducted, including multiple tests on each specimen. The test results showed that the shear characteristics of the specimens played an important role in their overall behaviour. All specimens, regardless of their shear capacity, developed severe diagonal shear cracks, forming a shear-plug under the impact point. The VecTor2 analyses of the test specimens were satisfactory in predicting damage levels, and maximum and residual displacements. The methodology employed by VecTor2, based on the MCFT, proved to be successful in predicting the shear-dominant behaviour of the specimens under impact.

Concrete Structures Subjected to Blast and Fragment Impacts

Concrete Structures Subjected to Blast and Fragment Impacts

Author:

Publisher:

Published: 2008

Total Pages: 72

ISBN-13:

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Book Synopsis Concrete Structures Subjected to Blast and Fragment Impacts by :

Download or read book Concrete Structures Subjected to Blast and Fragment Impacts written by and published by . This book was released on 2008 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Design Against Blast

Design Against Blast

Author: S. Syngellakis

Publisher: WIT Press

Published: 2013

Total Pages: 225

ISBN-13: 1845647505

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Terrorist attacks and other destructive incidents caused by explosives have, in recent years, prompted considerable research and development into the protection of structures against blast loads. For this objective to be achieved, experiments have been performed and theoretical studies carried out to improve our assessments of the intensity as well as the space-time distribution of the resulting blast pressure on the one hand and the consequences of an explosion to the exposed environment on the other.This book aims to enhance awareness on and understanding of these topical issues through a collection of relevant, Transactions of the Wessex Institute of Technology articles written by experts in the field. The book starts with an overview of key physics-based algorithms for blast and fragment environment characterisation, structural response analyses and structural assessments with reference to a terrorist attack in an urban environment and the management of its inherent uncertainties.A subsequent group of articles is concerned with the accurate definition of blast pressure, which is an essential prerequisite to the reliable assessment of the consequences of an explosion. Other papers are concerned with alternative methods for the determination of blast pressure, based on experimental measurements or neural networks. A final group of articles reports investigations on predicting the response of specific structural entities and their contents.The book concludes with studies on the effectiveness of steel-reinforced polymer in improving the performance of reinforced concrete columns and the failure mechanisms of seamless steel pipes used in nuclear industry.


Book Synopsis Design Against Blast by : S. Syngellakis

Download or read book Design Against Blast written by S. Syngellakis and published by WIT Press. This book was released on 2013 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terrorist attacks and other destructive incidents caused by explosives have, in recent years, prompted considerable research and development into the protection of structures against blast loads. For this objective to be achieved, experiments have been performed and theoretical studies carried out to improve our assessments of the intensity as well as the space-time distribution of the resulting blast pressure on the one hand and the consequences of an explosion to the exposed environment on the other.This book aims to enhance awareness on and understanding of these topical issues through a collection of relevant, Transactions of the Wessex Institute of Technology articles written by experts in the field. The book starts with an overview of key physics-based algorithms for blast and fragment environment characterisation, structural response analyses and structural assessments with reference to a terrorist attack in an urban environment and the management of its inherent uncertainties.A subsequent group of articles is concerned with the accurate definition of blast pressure, which is an essential prerequisite to the reliable assessment of the consequences of an explosion. Other papers are concerned with alternative methods for the determination of blast pressure, based on experimental measurements or neural networks. A final group of articles reports investigations on predicting the response of specific structural entities and their contents.The book concludes with studies on the effectiveness of steel-reinforced polymer in improving the performance of reinforced concrete columns and the failure mechanisms of seamless steel pipes used in nuclear industry.

Finite Element Analysis and Experimental Validation of Reinforced Concrete Single-mat Slabs Subjected to Blast Loads

Finite Element Analysis and Experimental Validation of Reinforced Concrete Single-mat Slabs Subjected to Blast Loads

Author: Akash Ashok Iwalekar

Publisher:

Published: 2018

Total Pages: 111

ISBN-13:

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The study carried out in this thesis is the investigation of the behavior of reinforced concrete slabs subjected to blast loading. A separate experimental study was performed involving twelve reinforced concrete (RC) slabs in a shock tube (Blast Load Simulator). Records from this experimental study were used for performing finite element analysis. Numerical simulation done in this research investigated the effect of using various bond-slip models in studying the behavior of these twelve RC slabs subjected to blast loading. LS-DYNA®, a non-linear transient dynamic finite element analysis program, was used in this study. Finite element models for twelve slabs using the LS-DYNA® subjected to experimental blast loads were used to study the bond-slip behavior between steel reinforcing bars and concrete. High-strength concrete reinforced with high-strength steel slabs and normal-strength concrete reinforced with normal-strength steel slabs were the two material combinations used in this research. The primary objective of this study was the investigation of two bond interaction system between steel and concrete, available in LS-DYNA®, for the two material combinations under blast loading. The assumption of a perfect-bond between concrete and steel was the first bond interaction system studied, utilizing Constrained Lagrange in Solid Formulation. Beam bond is another bond interaction system investigated using Beam in Solid formulation in the program. Furthermore, three functions were investigated in the beam bond interaction system along with the program generated beam bond function. Validation of these interaction systems, with experimental data, was the goal of the project. Upon investigation of this research, comparison between results of the finite element analysis and the experimental validation of reinforced concrete single-mat slabs which were subjected to blast loading, assisted in the conclusion that the beam bond function proposed by Murcia-Delso Juan is the most consistent among all of the interaction systems. However, with slight modifications in the beam bond function proposed by Grassl, which is identical to the CEB FIP model, gives the most accurate results for high strength materials in terms of peak deflection and residual deflection history. Most accurate prediction to experimental records in given by perfect bond formulation, and bond-slip fails to give accurate results for blast loading.


Book Synopsis Finite Element Analysis and Experimental Validation of Reinforced Concrete Single-mat Slabs Subjected to Blast Loads by : Akash Ashok Iwalekar

Download or read book Finite Element Analysis and Experimental Validation of Reinforced Concrete Single-mat Slabs Subjected to Blast Loads written by Akash Ashok Iwalekar and published by . This book was released on 2018 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study carried out in this thesis is the investigation of the behavior of reinforced concrete slabs subjected to blast loading. A separate experimental study was performed involving twelve reinforced concrete (RC) slabs in a shock tube (Blast Load Simulator). Records from this experimental study were used for performing finite element analysis. Numerical simulation done in this research investigated the effect of using various bond-slip models in studying the behavior of these twelve RC slabs subjected to blast loading. LS-DYNA®, a non-linear transient dynamic finite element analysis program, was used in this study. Finite element models for twelve slabs using the LS-DYNA® subjected to experimental blast loads were used to study the bond-slip behavior between steel reinforcing bars and concrete. High-strength concrete reinforced with high-strength steel slabs and normal-strength concrete reinforced with normal-strength steel slabs were the two material combinations used in this research. The primary objective of this study was the investigation of two bond interaction system between steel and concrete, available in LS-DYNA®, for the two material combinations under blast loading. The assumption of a perfect-bond between concrete and steel was the first bond interaction system studied, utilizing Constrained Lagrange in Solid Formulation. Beam bond is another bond interaction system investigated using Beam in Solid formulation in the program. Furthermore, three functions were investigated in the beam bond interaction system along with the program generated beam bond function. Validation of these interaction systems, with experimental data, was the goal of the project. Upon investigation of this research, comparison between results of the finite element analysis and the experimental validation of reinforced concrete single-mat slabs which were subjected to blast loading, assisted in the conclusion that the beam bond function proposed by Murcia-Delso Juan is the most consistent among all of the interaction systems. However, with slight modifications in the beam bond function proposed by Grassl, which is identical to the CEB FIP model, gives the most accurate results for high strength materials in terms of peak deflection and residual deflection history. Most accurate prediction to experimental records in given by perfect bond formulation, and bond-slip fails to give accurate results for blast loading.

Damage Assessment and Prediction of FRP Strengthened RC Structures Subjected to Blast and Impact Loads

Damage Assessment and Prediction of FRP Strengthened RC Structures Subjected to Blast and Impact Loads

Author: Azrula A. Mutalib

Publisher:

Published: 2011

Total Pages: 232

ISBN-13:

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[Truncated abstract] Reinforced concrete (RC) structures might subject to severe impulsive loadings due to shock wave, blast wave or direct impact in their service life. The Fiber Reinforced Polymer (FRP) strengthening concepts have been used in many studies to strengthen these RC structures in resisting progressive collapse, structural damage and preventing injuries against dynamic explosive impacts. Its effectiveness in strengthening RC structures to resist blast and impact loads have been proven in both numerical and experimental studies. However, there are limited systematic studies that directly correlate the increase in structural capacities in resisting the blast loads with the strengthening measures, such as the strengthening materials, layers of FRP applied and types of epoxy used. The pressure-impulse (P-I) curves are often used to quantify structural performance under various blast loading scenarios. By developing P-I curve for FRP strengthened structures, the quantitative correlation between minimum peak pressure and impulse required to reaching a particular level of damage of FRP strengthened and unstrengthened columns can be plotted. In this research, the assessment on the failure modes and dynamic response of structures with FRP strengthening under different condition of impact and blast loading are determined. To achieve this two experimental programs (Chapter 2 and 3) and a series of numerical analyses (Chapter 4-7) are carried out. The experimental programs determine the effects of different types of Carbon Fiber Reinforced Polymer (CFRP) strengthening approaches on the dynamic response of RC structural elements under impact loads. The first experimental program involves of static and impact loading on the CFRP strengthened RC beams. Three types of CFRP strengthening approaches are selected as follows: a) one of CFRP longitudinal strip is applied on the tension zone of the RC beam; b) RC beam is wrapped by CFRP fabric; and c) RC beam is strengthened with combination of both CFRP longitudinal strip and wrap. In the second experimental program, the efficiency and performance of CFRP strengthening of RC slabs under repeated impact loads is examined. The selected CFRP strengthening approaches are as follows: a) two layers of CFRP fabrics applied with epoxy to the tension side with the second layer being placed in a perpendicular direction to the first layer; b) CFRP strengthened slab with anchors at the slab boundaries; and c) CFRP strengthened slab with anchors at the slab boundaries and more anchors around the middle span. Each slab is initially subjected to repeated impact loads until failure is reached...


Book Synopsis Damage Assessment and Prediction of FRP Strengthened RC Structures Subjected to Blast and Impact Loads by : Azrula A. Mutalib

Download or read book Damage Assessment and Prediction of FRP Strengthened RC Structures Subjected to Blast and Impact Loads written by Azrula A. Mutalib and published by . This book was released on 2011 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: [Truncated abstract] Reinforced concrete (RC) structures might subject to severe impulsive loadings due to shock wave, blast wave or direct impact in their service life. The Fiber Reinforced Polymer (FRP) strengthening concepts have been used in many studies to strengthen these RC structures in resisting progressive collapse, structural damage and preventing injuries against dynamic explosive impacts. Its effectiveness in strengthening RC structures to resist blast and impact loads have been proven in both numerical and experimental studies. However, there are limited systematic studies that directly correlate the increase in structural capacities in resisting the blast loads with the strengthening measures, such as the strengthening materials, layers of FRP applied and types of epoxy used. The pressure-impulse (P-I) curves are often used to quantify structural performance under various blast loading scenarios. By developing P-I curve for FRP strengthened structures, the quantitative correlation between minimum peak pressure and impulse required to reaching a particular level of damage of FRP strengthened and unstrengthened columns can be plotted. In this research, the assessment on the failure modes and dynamic response of structures with FRP strengthening under different condition of impact and blast loading are determined. To achieve this two experimental programs (Chapter 2 and 3) and a series of numerical analyses (Chapter 4-7) are carried out. The experimental programs determine the effects of different types of Carbon Fiber Reinforced Polymer (CFRP) strengthening approaches on the dynamic response of RC structural elements under impact loads. The first experimental program involves of static and impact loading on the CFRP strengthened RC beams. Three types of CFRP strengthening approaches are selected as follows: a) one of CFRP longitudinal strip is applied on the tension zone of the RC beam; b) RC beam is wrapped by CFRP fabric; and c) RC beam is strengthened with combination of both CFRP longitudinal strip and wrap. In the second experimental program, the efficiency and performance of CFRP strengthening of RC slabs under repeated impact loads is examined. The selected CFRP strengthening approaches are as follows: a) two layers of CFRP fabrics applied with epoxy to the tension side with the second layer being placed in a perpendicular direction to the first layer; b) CFRP strengthened slab with anchors at the slab boundaries; and c) CFRP strengthened slab with anchors at the slab boundaries and more anchors around the middle span. Each slab is initially subjected to repeated impact loads until failure is reached...

The Dynamic Response of Concrete Filled FRP Tubes Subjected to Blast and Impact Loading

The Dynamic Response of Concrete Filled FRP Tubes Subjected to Blast and Impact Loading

Author: Yazan Qasrawi

Publisher:

Published: 2014

Total Pages: 512

ISBN-13:

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Blasts and impacts are two of the severest loads a structure can experience. Blast experimenters, however, have observed that the load imparted to a circular member was lower than the predicted design load. Additionally, numerous investigations have established the superiority of concrete filled FRP tubes (CFFTs) over conventional reinforced concrete members. These observations indicated CFFTs' potential to resist dynamic blast and impact loads. The experimental and numerical investigations presented in this thesis aimed to demonstrate the suitability of CFFTs to resist blast and impact loads, to determine the parameters that influence their behaviour under such loads, and to develop a design procedure for resisting these loads. The initial numerical investigation determined the reflected blast loading parameters experienced by a circular cross section. The experimental phase consisted of testing twelve full scale specimens, two monotonically, four under impact loading, and six under close-in blast loading. The monotonically tested specimens acted as controls for the entire program. The results of the impact testing investigation were used to develop and validate a non-linear single degree of freedom (SDOF) model. This impact phase also led to the development of relatively simple procedures for designing CFFTs under impact loading using either SDOF modeling or the conservation of energy. Analysis of the blast testing results led to the development of numerical procedures for obtaining an equivalent close-in blast loading for SDOF analysis of CFFTs and Pressure-Impulse diagrams. The use of SDOF modeling and conservation of energy in blast design were also discussed. Finally, a non-linear explicit dynamic model of CFFTs was developed using the commercial software ANSYS Autodyn. This model was verified using the experimental impact and blast test results and used to conduct a parametric study. The results of these investigations indicated that CFFTs were particularly suitable for blast and impact resistant applications, as their geometry diffracted blast waves and the addition of the tube increased their energy absorbing capacity significantly giving them additional strength and ductility. The tube also confined and protected the concrete core and simplified construction.


Book Synopsis The Dynamic Response of Concrete Filled FRP Tubes Subjected to Blast and Impact Loading by : Yazan Qasrawi

Download or read book The Dynamic Response of Concrete Filled FRP Tubes Subjected to Blast and Impact Loading written by Yazan Qasrawi and published by . This book was released on 2014 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Blasts and impacts are two of the severest loads a structure can experience. Blast experimenters, however, have observed that the load imparted to a circular member was lower than the predicted design load. Additionally, numerous investigations have established the superiority of concrete filled FRP tubes (CFFTs) over conventional reinforced concrete members. These observations indicated CFFTs' potential to resist dynamic blast and impact loads. The experimental and numerical investigations presented in this thesis aimed to demonstrate the suitability of CFFTs to resist blast and impact loads, to determine the parameters that influence their behaviour under such loads, and to develop a design procedure for resisting these loads. The initial numerical investigation determined the reflected blast loading parameters experienced by a circular cross section. The experimental phase consisted of testing twelve full scale specimens, two monotonically, four under impact loading, and six under close-in blast loading. The monotonically tested specimens acted as controls for the entire program. The results of the impact testing investigation were used to develop and validate a non-linear single degree of freedom (SDOF) model. This impact phase also led to the development of relatively simple procedures for designing CFFTs under impact loading using either SDOF modeling or the conservation of energy. Analysis of the blast testing results led to the development of numerical procedures for obtaining an equivalent close-in blast loading for SDOF analysis of CFFTs and Pressure-Impulse diagrams. The use of SDOF modeling and conservation of energy in blast design were also discussed. Finally, a non-linear explicit dynamic model of CFFTs was developed using the commercial software ANSYS Autodyn. This model was verified using the experimental impact and blast test results and used to conduct a parametric study. The results of these investigations indicated that CFFTs were particularly suitable for blast and impact resistant applications, as their geometry diffracted blast waves and the addition of the tube increased their energy absorbing capacity significantly giving them additional strength and ductility. The tube also confined and protected the concrete core and simplified construction.

Pressure-impulse Diagrams Using Finite Element Analysis for Reinforced Concrete Slabs Subjected to Blast Loading

Pressure-impulse Diagrams Using Finite Element Analysis for Reinforced Concrete Slabs Subjected to Blast Loading

Author: Jitesh Kumar Reddy Nalagotla

Publisher:

Published: 2013

Total Pages: 93

ISBN-13:

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Reinforced concrete slab systems are widely used in protective structures designed to resist blast events. Blast events subject structures to high pressure and impulse loads. The magnitude of blast load experienced by a structural element is directly related to the exposed area. Hence protection of reinforced concrete slabs and walls, which constitute the maximum exposed area of a structure when subjected to blast loads, is of great importance. The main purpose of the project is to study the non-linear response of reinforced concrete slabs when subjected to impact and blast loading. Blast loading comprises of impulsive, dynamic and quasi-static loading conditions. And the performance of reinforced concrete slabs subjected to these loads is highly dependent upon the reinforcing steel provided in the slab. Hence a comprehensive analysis is performed on a representative slab panel with varying reinforcement. Due to the nature of the blast loading analysis method used influences the slab response significantly. Hence the slab response was predicted and compared using finite element (FE) and single degree of freedom (SDOF) methods. An advanced finite element modeling tool, LSDYNA and a commonly used SDOF analysis tool, SBEDS are employed for the purpose of analysis. A parametric analysis is conducted to develop Pressure-Impulse (PI) curves for different damage levels. Curve fit analysis was performed to characterize the PI curves generated from FE method. Conclusions and future work recommendations are presented for design of reinforced concrete slabs for blast protection based upon the research are presented and discussed.abstract.


Book Synopsis Pressure-impulse Diagrams Using Finite Element Analysis for Reinforced Concrete Slabs Subjected to Blast Loading by : Jitesh Kumar Reddy Nalagotla

Download or read book Pressure-impulse Diagrams Using Finite Element Analysis for Reinforced Concrete Slabs Subjected to Blast Loading written by Jitesh Kumar Reddy Nalagotla and published by . This book was released on 2013 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete slab systems are widely used in protective structures designed to resist blast events. Blast events subject structures to high pressure and impulse loads. The magnitude of blast load experienced by a structural element is directly related to the exposed area. Hence protection of reinforced concrete slabs and walls, which constitute the maximum exposed area of a structure when subjected to blast loads, is of great importance. The main purpose of the project is to study the non-linear response of reinforced concrete slabs when subjected to impact and blast loading. Blast loading comprises of impulsive, dynamic and quasi-static loading conditions. And the performance of reinforced concrete slabs subjected to these loads is highly dependent upon the reinforcing steel provided in the slab. Hence a comprehensive analysis is performed on a representative slab panel with varying reinforcement. Due to the nature of the blast loading analysis method used influences the slab response significantly. Hence the slab response was predicted and compared using finite element (FE) and single degree of freedom (SDOF) methods. An advanced finite element modeling tool, LSDYNA and a commonly used SDOF analysis tool, SBEDS are employed for the purpose of analysis. A parametric analysis is conducted to develop Pressure-Impulse (PI) curves for different damage levels. Curve fit analysis was performed to characterize the PI curves generated from FE method. Conclusions and future work recommendations are presented for design of reinforced concrete slabs for blast protection based upon the research are presented and discussed.abstract.

Response of Structures Under Extreme Loading

Response of Structures Under Extreme Loading

Author: Venkatesh K.R. Kodur

Publisher: DEStech Publications, Inc

Published: 2015-07-01

Total Pages: 1014

ISBN-13: 1605952273

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Original research on performance of materials under a wide variety of blasts, impacts, severe loading and fireCritical information for protecting buildings and civil infrastructure against human attack, deterioration and natural disastersTest and design data for new types of concrete, steel and FRP materials This technical book is devoted to the empirical and theoretical analysis of how structures and the materials constituting them perform under the extreme conditions of explosions, fire, and impact. Each of the 119 fully refereed presentations is published here for the first time and was selected because of its original contribution to the science and engineering of how materials, bridges, buildings, tunnels and their components, such as beams and pre-stressed parts, respond to potentially destructive forces. Emphasis is placed on translating empirical data to design recommendations for strengthening structures, including strategies for fire and earthquake protection as well as blast mitigation. Technical details are provided on the development and behavior of new resistant materials, including reinforcements, especially for concrete, steel and their composites.


Book Synopsis Response of Structures Under Extreme Loading by : Venkatesh K.R. Kodur

Download or read book Response of Structures Under Extreme Loading written by Venkatesh K.R. Kodur and published by DEStech Publications, Inc. This book was released on 2015-07-01 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt: Original research on performance of materials under a wide variety of blasts, impacts, severe loading and fireCritical information for protecting buildings and civil infrastructure against human attack, deterioration and natural disastersTest and design data for new types of concrete, steel and FRP materials This technical book is devoted to the empirical and theoretical analysis of how structures and the materials constituting them perform under the extreme conditions of explosions, fire, and impact. Each of the 119 fully refereed presentations is published here for the first time and was selected because of its original contribution to the science and engineering of how materials, bridges, buildings, tunnels and their components, such as beams and pre-stressed parts, respond to potentially destructive forces. Emphasis is placed on translating empirical data to design recommendations for strengthening structures, including strategies for fire and earthquake protection as well as blast mitigation. Technical details are provided on the development and behavior of new resistant materials, including reinforcements, especially for concrete, steel and their composites.

Structures Subject to Dynamic Loading

Structures Subject to Dynamic Loading

Author: R. Narayanan

Publisher: CRC Press

Published: 1991-07-08

Total Pages: 342

ISBN-13: 9781851665822

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This text contains a number of self-contained chapters by researchers from around the world dealing with various aspects of structures subjected to dynamic loading. Topics covered include the earthquake resistant design of steel and reinforced concrete structures, dynamic fluid and soil structure interaction, wind induced vibrations and damping of structures and structures subjected to impact, blast and travelling loads.


Book Synopsis Structures Subject to Dynamic Loading by : R. Narayanan

Download or read book Structures Subject to Dynamic Loading written by R. Narayanan and published by CRC Press. This book was released on 1991-07-08 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text contains a number of self-contained chapters by researchers from around the world dealing with various aspects of structures subjected to dynamic loading. Topics covered include the earthquake resistant design of steel and reinforced concrete structures, dynamic fluid and soil structure interaction, wind induced vibrations and damping of structures and structures subjected to impact, blast and travelling loads.