NUMERICAL SIMULATION FOR A TYPICAL HIGH-RISE BUILDING IN WENCHUAN EARTHQUAKE BASED ON MFBFE SHEAR WALL ELEMENT

In shear wall structures, the cross section of shear wall is much wider than that of the beam and the column, thus the assumptions of plane section and zero shear deformation may cause great error in analysis. A modified force-based fiber element (MFBFE) is proposed in this paper, which accounts for the section shear deformation and is capable of accurately predicting the nonlinear deformation of the shear wall. The cross section is a curved surface in the modified element. Nonlinear seismic response analysis of a seriously damage high-rise building by Wenchuan Earthquake in Dujiangyan is performed using the MFBFE shear wall element. Analysis results show that the maximum inter-story drift occurs at the first floor where the damage is serious, which agrees well with the damage survey results. The rationality and reliability of the proposed shear wall element are validated, which provides an effective tool for further research on the seismic behavior of tall buildings.