Universal three-strip model of steel plate shear walls based on incomplete tension field theory
Steel plate shear walls still possess compressive strength after shear buckling,while the effect of shear buckling on stiffness and strength should not be underestimated.To address this phenomenon while concurrently resolving challenges such as non-coincident node positions in current steel plate shear wall models and the presence of an excessive number of small beam-column elements,this study proposed an universal three-strip model.In this model,the infill plates were substituted with just three tension strips,connected to the midpoints and endpoints of the frame columns and beams in the steel plate shear wall.These strips were crafted based on the principles of incomplete tension field theory,allowing them to effectively consider the post buckling compressive capacity while addressing the non-coincident node positioning challenges within the beam-column elements.The parameter analyses show that the model accurately predicts the nonlinear behavior of steel plate shear wall structures.Using the calculations of the refined shell element model as reference,the elastic stiffness error of the two models does not exceed 5.27％.The ultimate load-bearing capacity error for both models remains below 3.74％,with the majority of the cases not exceeding 2％.The hysteresis analysis results indicate that the model can predict the hysteretic performance of steel plate shear walls more accurately,with better simulation of elastic,elastic-plastic,strengthening,and damage phases.Additionally,based on the internal force results from the experiments and shell model,it confirms that this model can yield internal force calculations consistent with the shell model.Compared with the results of the shell model,the error in the moments of the boundary columns is not more than 5％,and the error in the analysis of the axial forces of the boundary columns is slightly larger,with a maximum error of 17.6％,but the results are on the safe side.
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维普
