Study On Seismic Behaviour Of Concrete Filled Steel Tube Frame-Shear Wall Structure

Composite frame structures consisting of concrete-filled steel tubular columns andsteel beam are being widely used in building structure. Concrete filled steel tube framestructure has common advantages of steel structure and concrete structure, It hascharacteristic of strong carrying capability, excellent seismic behavior, great economicbenefits and so on. In China, the frame structure are often mixed with reinforcedconcrete shear walls to form a high-rise building system. However, most researchersfocused on components and joints and the overall seismic performance of theconcrete-filled steel tube structure, the overall seismic behavior of high-rise buildingsstructure consisting of concrete-filled steel tubular frame and reinforced concrete shearwall researched is relatively less.This article focuses on seismic behavior of concrete-filled steel tubular framestructure considering reinforced concrete shear wall, the finite element analysis softwareSAP2000is used to analyze conduct modal analysis and seismic response elastic-plastic time history analysis of the12layers structure of concrete-filled steel tubularframe-shear wall, comparing with12layers structure of concrete-filled steel tubularcomposite frame. The conclusions are referential values for structure design.Thecontent of the work done and the conclusions as follows:（1）The mechanics characteristic of concrete-filled steel tubular is analysedaccording as previous studies and reference books, it includes working theory betweenconcrete and steel tubular, the dynamic performance of concrete-filled steel tubular.（2）The modal analysis of the two modal structures basiced theory of earthquakeanalysis and the finite element, comparing with the transformation of nature periods,nature frequency and the change of afor three formations of the modal structures.It wasfound that the formation of two modle structures were consistent.（3）Seismic response elastic-plastic time history analysis of the two modalstructures, under the function of the different kind of seismic waves,comparing with themaximum displacements, the maximum relative storm displacement angle, the peakhorizontal acceleration, and the bottom shear force,and so on. The results showed thatthe concrete-filled steel tubular frame structure cooperated well with the reinforcedconcrete shear wall and exhibited excellent seismic performance.（4）Overpassing on the analysis of the finite element analysis software,which educed that the concrete-filled steel tubular frame-shear wall structure were uniqueadvantages in seismic behaviors such as higher load bearing and deformation behavior,and so on.