TY - GEN
T1 - Macromodel-based simulation of catenary action of RC beam-column sub-assemblages
AU - Yu, Jun
AU - Tan, Kang Hai
PY - 2010
Y1 - 2010
N2 - The macromodel-based finite element methods (macro-FEM), in which beams and columns are modeled using fiber elements with uniaxial material properties of concrete and steel, and joints are modeled using assemblies of springs with specified forcedeformation relationships, are very efficient at analyzing the performance of RC structures in which flexural and axial behavior are dominant. A component-based joint model consisting of a rigid panel and six equivalent nonlinear springs is proposed for macro-FE analysis with the help of commercial software Engineer's Studio. To evaluate the properties of bond-slip springs, the bond slip model is improved by considering the effect of embedment length of reinforcement anchored into beam-column joints. The proposed joint model is validated through the comparisons of both load-deformation history and beam axial forces versus middle joint displacements with the test results of two RC beam-column sub-assemblages. The specimens comprise two end column stubs, one middle beam-column joint and one two-bay beam under the middle column removal scenario. Finally, by incorporating the proposed joint model and simplifying the boundary conditions of sub-assemblages as linear elastic springs, the macro-FE analyses are conducted to investigate the effects of axial and rotational restraints on structural member responses under a middle column removal scenario. This study seeks to provide more insight into catenary action of RC beam-column sub-assemblages.
AB - The macromodel-based finite element methods (macro-FEM), in which beams and columns are modeled using fiber elements with uniaxial material properties of concrete and steel, and joints are modeled using assemblies of springs with specified forcedeformation relationships, are very efficient at analyzing the performance of RC structures in which flexural and axial behavior are dominant. A component-based joint model consisting of a rigid panel and six equivalent nonlinear springs is proposed for macro-FE analysis with the help of commercial software Engineer's Studio. To evaluate the properties of bond-slip springs, the bond slip model is improved by considering the effect of embedment length of reinforcement anchored into beam-column joints. The proposed joint model is validated through the comparisons of both load-deformation history and beam axial forces versus middle joint displacements with the test results of two RC beam-column sub-assemblages. The specimens comprise two end column stubs, one middle beam-column joint and one two-bay beam under the middle column removal scenario. Finally, by incorporating the proposed joint model and simplifying the boundary conditions of sub-assemblages as linear elastic springs, the macro-FE analyses are conducted to investigate the effects of axial and rotational restraints on structural member responses under a middle column removal scenario. This study seeks to provide more insight into catenary action of RC beam-column sub-assemblages.
KW - Bond-slip
KW - Catenary action
KW - Component-based joint model
KW - Macro-FEM
UR - http://www.scopus.com/inward/record.url?scp=85013941700&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85013941700&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85013941700
T3 - 3rd International fib Congress and Exhibition, Incorporating the PCI Annual Convention and Bridge Conference: Think Globally, Build Locally, Proceedings
BT - 3rd International fib Congress and Exhibition, Incorporating the PCI Annual Convention and Bridge Conference
PB - Precast Prestressed Concrete Institute
T2 - 3rd International fib Congress and Exhibition, Incorporating the PCI Annual Convention and Bridge Conference 2010
Y2 - 29 May 2010 through 2 June 2010
ER -