The Seismic Performance Analysis Of High-rise SRC Frame Structure

Steel reinforced concrete structure with a high bearing capacity, ductility and toughness is good, in recent years, many high-rise buildings to be more and more widely used. But the domestic in the earthquake zone is rarely all-steel-reinforced concrete structural system; the study of the seismic performance of the system is not enough. Therefore, the analysis of steel ratio in different cases, steel reinforced concrete frame structure with high seismic performance of the engineering is valuable. Based on the reason; This paper uses time-history method and pushover method to deal with the dynamic seismic analysis of SRC frame in consideration of the varying of shaped steel ratio. The main contributions in this paper are as follows:Firstly, modal parameters are obtained by modal analysis in ETABS. It proves the accuracy of the structure model. Modal analysis provides modal shape for Pushover analysis and dynamic history analysis. The mechanics and deformation of the structure is obtained by modal contribution response spectrum method, which is liable to appoint plastic hinges for the building.Secondly, nonlinear behaviors and performance indexes of structures under heavy earthquakes are also obtained through the ETABS in the thesis. Finally the capacity spectrum curve is used to simply estimate the damage of the six model structures of different shaped steel ratioFinally, the seismic of SRC frame structure is performed using the finite-element analysis program-ETABS, this article analyzes the influences to the six SRC frame structure because of the varying of shaped steel ratio, and then reasonable range of shaped steel ratio is from 4% to 8% ,through the contrast between the pushover analysis and dynamic history analysisBasing on the considerations of the overall seismic performance of structural, through a comprehensive analysis of the calculation results ,we can see: steel-reinforced concrete columns with steel ratio is around 4 ~ 8% is a more reasonable range, both to meet the bearing capacity and ductility requirements, and can be materials and provinces.