Abstract
The present study deals with nonlinear analysis of reinforced concrete structures exposed to transient dynamic loadings. These are loadings which produce a significant transient contribution to the structural response, such as blasts and impacts. Transient loadings involve vibrations in the complete frequency domain, from the lowest modes, pertaining to the global shapes of deformation, to the high frequency modes, associated with stress waves. The numerical analyses are carried out by a discretization in space and time, by means of the Finite Element method and the Average Acceleration time integration algorithm, respectively. The Finite Element program FENRIS has served as a framework in the study. Concerning the applied elements, the program is based on a Total Lagrangian description of motion. Nonlinear geometric behavior is accounted for by use of the Green strain definition. In conjunction with Green strain, the second Piola-Kirchhoff stress tensor is applied. Concrete sections are modeled by an eight node hexahedron, while a two node bar element is applied for reinforcement bars. The main topic of the present study concerns constitutive modeling of reinforced concrete. A brief overview of the mechanical properties of concrete and reinforcement steel, and the influence of high rate loading, is given. A three-dimensional
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Citation Formats
Hoeiseth, K V.
Nonlinear analysis of reinforced concrete structures exposed to transient loading.
Norway: N. p.,
1992.
Web.
Hoeiseth, K V.
Nonlinear analysis of reinforced concrete structures exposed to transient loading.
Norway.
Hoeiseth, K V.
1992.
"Nonlinear analysis of reinforced concrete structures exposed to transient loading."
Norway.
@misc{etde_10131100,
title = {Nonlinear analysis of reinforced concrete structures exposed to transient loading}
author = {Hoeiseth, K V}
abstractNote = {The present study deals with nonlinear analysis of reinforced concrete structures exposed to transient dynamic loadings. These are loadings which produce a significant transient contribution to the structural response, such as blasts and impacts. Transient loadings involve vibrations in the complete frequency domain, from the lowest modes, pertaining to the global shapes of deformation, to the high frequency modes, associated with stress waves. The numerical analyses are carried out by a discretization in space and time, by means of the Finite Element method and the Average Acceleration time integration algorithm, respectively. The Finite Element program FENRIS has served as a framework in the study. Concerning the applied elements, the program is based on a Total Lagrangian description of motion. Nonlinear geometric behavior is accounted for by use of the Green strain definition. In conjunction with Green strain, the second Piola-Kirchhoff stress tensor is applied. Concrete sections are modeled by an eight node hexahedron, while a two node bar element is applied for reinforcement bars. The main topic of the present study concerns constitutive modeling of reinforced concrete. A brief overview of the mechanical properties of concrete and reinforcement steel, and the influence of high rate loading, is given. A three-dimensional constitutive model for concrete is presented. The model is based on the elastic-viscoplastic theory of Perzyna, combined with the smeared crack approach of Ottosen and Dahlblom. The strain rate influence on the compressive strength of concrete is accounted for. Reinforcement steel is treated as an elastic-viscoplastic material, taking account of the strain rate influence on the yield stress. 49 refs., 62 figs., 6 tabs.}
place = {Norway}
year = {1992}
month = {Mar}
}
title = {Nonlinear analysis of reinforced concrete structures exposed to transient loading}
author = {Hoeiseth, K V}
abstractNote = {The present study deals with nonlinear analysis of reinforced concrete structures exposed to transient dynamic loadings. These are loadings which produce a significant transient contribution to the structural response, such as blasts and impacts. Transient loadings involve vibrations in the complete frequency domain, from the lowest modes, pertaining to the global shapes of deformation, to the high frequency modes, associated with stress waves. The numerical analyses are carried out by a discretization in space and time, by means of the Finite Element method and the Average Acceleration time integration algorithm, respectively. The Finite Element program FENRIS has served as a framework in the study. Concerning the applied elements, the program is based on a Total Lagrangian description of motion. Nonlinear geometric behavior is accounted for by use of the Green strain definition. In conjunction with Green strain, the second Piola-Kirchhoff stress tensor is applied. Concrete sections are modeled by an eight node hexahedron, while a two node bar element is applied for reinforcement bars. The main topic of the present study concerns constitutive modeling of reinforced concrete. A brief overview of the mechanical properties of concrete and reinforcement steel, and the influence of high rate loading, is given. A three-dimensional constitutive model for concrete is presented. The model is based on the elastic-viscoplastic theory of Perzyna, combined with the smeared crack approach of Ottosen and Dahlblom. The strain rate influence on the compressive strength of concrete is accounted for. Reinforcement steel is treated as an elastic-viscoplastic material, taking account of the strain rate influence on the yield stress. 49 refs., 62 figs., 6 tabs.}
place = {Norway}
year = {1992}
month = {Mar}
}