The Seismic Performance Research Of Bottom Frame-Shear Wall Masonry Structure

The bottom frame-shear wall masonry structure is a kind of mixed structure patternwhich masonry structure consists of the upper part and frame-shear wall structure is at thebottom. For this kind of structure, on the one hand, the upper masonry part possessesstrong lateral stiffness and high weight; on the other hand, the lateral stiffness and weightof bottom frame-shear wall part are smaller than the upper part. This kind of structure hasa structural feature of “the above stiffness is bigger than underside”，“the above weight isheavier than underside”. For this weak bottom structure, the seismic performance whichunder the seismic action is not often well. From the statistical analysis of previousearthquake, we can conclude that the bottom frame-shear wall masonry structure is a kindof structure which extremely vulnerable to earthquake damage. Therefore, the seismicperformance research of the bottom frame-shear wall masonry structure is necessary. Inaddition, because the earthquake happens frequently in our country in recent years and ourcountry has made the seismic intensity for some areas improve, some of the originalbottom framework will not comply with the design specification. Therefore, the study ofseismic performance and reinforced methods for existing buildings is very urgent.This paper is by means of the finite element analysis software SAP2000and studiesthe seismic performance of the bottom frame-shear wall masonry structure under thefrequent earthquake. Specific work is as follows:(1) The paper combs the domestic and foreign research status on the bottom frame-shear wall masonry structure and analyzes the cause of earthquake damage and disastercharacteristics.(2) According to the practical engineering, this paper sets up the bottom frame-shearwall masonry structure finite element three-dimensional model. By changing the framebeam setion and column section, we study the seismic performance influence under thefrequent earthquake.(3)This paper sets up the bottom frame-shear wall masonry structure finite elementthree-dimensional model. By changing the floor slab thickness of transition layer, we studythe seismic performance influence under the frequent earthquake.(4) For the original underlying framework masonry structure, this paper adopts threekinds of strengthening ways. By comparing the calculation results of three differentreinforcement ways, we study the seismic performance influence under the frequent earthquake and give reasonable suggestions for the seismic strengthening.