Effect Of Vertical Seismic Action On Seismic Behavior Of Shear Wall Structure In 9 Degrees

This paper takes Xichang(9 degrees)of a high-rise shear wall structure as the research object,focuses on the influence of 9 degrees of vertical earthquake action on the seismic performance of shear wall structure is adopted.The modal decomposition response spectrum method and time history analysis method of the shear wall structure with unidirectional earthquake level,the level of bidirectional earthquake the level and the level of one-way,and two-way vertical earthquake and analysis of these types of conditions under vertical earthquake is calculated;then based on the original structure model were added three different lengths of the cantilever beam,analysis of the working conditions of the several calculation.On the structure of the horizontal displacement between layers the axial force,shear wall,bending moment,bending moment,cantilever beam bending moment and vertical displacement of root end were analyzed,in order to study the effect of vertical earthquake on seismic behavior of shear wall structure.The results show that the vertical seismic intensity region 9 has great influence on the internal force and deformation of the structure;the use of shear wall structure under vertical seismic time history analysis method of calculation is necessary;vertical seismic action of the shear wall axial tension increased 20.20%,however the maximum axial pressure increased by 15.23%;the moment of beam end and mid span moment respectively increased 86.36%and 89.47%;the influence degree of vertical seismic action on the cantilever beam bottom bending moment with increasing out the length increasing,and the greater the length increased more significantly;the horizontal displacement is basically not affected by the vertical earthquake,but the vertical seismic effect on vertical displacement under horizontal bending effect.The above conclusions can be applied to the design of shear wall structure in 9 degree zone,which can provide some reference for the selection of seismic response calculation method,the influence of vertical seismic action and the determination of the length of cantilever member.