Abstract:
The effects of flange shape, openings, axial load ratio, shear span ratio and other parameters on the seismic performance of the shear wall with flanges and openings were investigated in this study. The accuracy of the shear wall detailed finite element model established by the ABAQUS software was verified by the Qian K's pseudo-static tests via the shear walls with openings and flanges. The load-displacement curves obtained from the simulation were in good agreement with tested results, and the processes of the shear walls failure were well simulated. After the verification of the model, the effects of the opening rate on the seismic performance of the shear wall with openings and flanges studied by varying the open rate and considering whether there is additional vertical steel bar or not, mathematical expressions characterizing the effects of the opening rate on the ultimate bearing capacity of the shear wall with openings and flanges were obtained. The seismic performance of rectangular, flanged, T-shaped, end-column and L-shaped shear wall were analyzed by varying the flange shape. The models of the shear wall with different axial load ratios and shear span ratios were established. The research results show that with the increase of the axial load ratio or the decrease of the shear span ratio, the weakening influence of the openings on ultimate bearing capacity of the shear wall increases gradually. Under the condition of low shear span ratio and high axial load ratio, the strengthening effect of the flange on the ultimate bearing capacity of the shear wall with openings is more obvious.