Research on the Phenomenon of Shear Force Over Limit in the Upper Shear Wall of Frame Supported Beam

Abstract

With the development of high-rise buildings, part of the frame structure is usually used to support the upper reinforced concrete shear wall, in order to form a large space. Thus a framed shear wall structure is formed. The shear force design value of the shear wall which is on top of the frame supported beam often exceeds limit value that a shear wall can bear during the construction design process. This does not meet the requirements of the current national code. A high-rise building with transfer story in 7 degree earthquake area is taken as an example to analyze the reason of shear wall over limit by using structural design software PKPM in this paper. Through numerical simulation analysis, it is concluded that the main reason for the shear force over limit is that the increase of constant load, which results in the increase of relative deformation of the frame supported beam and the shear wall, as well as the axial force of the coupling beam. Specific measures to reduce the shear force over limit are proposed by using a finite element analysis software MIDAS, which provides references for a structural engineer to carry out the design.