FINITE ELEMENT ANALYSIS OF STEEL PLATE REINFORCED HIGH-STRENGTH CONCRETE COMPOSITE SHEAR WALLS

摘要

Three steel-plate reinforced concrete composite shear walls with square concrete filled steel tube concealed columns are tested under cyclic loading. This paper presents some main contents of this experiment, and focuses on the finite element analysis of the tested walls. The finite element analysis is conducted in the platform of MSC. Mentat/Marc. Incremental elastic-plastic constitutive theory is used for uncracked concrete. And when concrete is cracked, it is regarded as anisotropy material. The smeared crack model is used to model cracks. And Poisson effect between the direction parallel and perpendicular to the crack is neglected. A linear stress-strain relationship is assumed for concrete after cracking. Incremental elastic-plastic constitutive theory is also applied to model the material behaviour of steel plates and reinforcing bars. And Von Mises yield criterion, kinematic hardening rule and associated flow law are used for this model. Elements of reinforcing bars are "inserted" into concrete elements, using the "insert" function in MSC. Mentat/Marc. Contact is set in the interfaces of steel plates outside of concrete and infill concrete. The FEA results of test units are found to be in good agreement with the test results, which validate the accuracy and rationality of the finite element model. This model can be used for further parameter analysis.