Based On The Displacement Of Steel - Concrete Composite Frame Structure Seismic Performance Analysis

Comparing with steel frame structure, the steel-concrete composite frame structure has bigger rigidity, stronger stabilization and stronger carrying capacity. Comparing with RC structure, it holds stronger carrying capacity, lighter weigh and better ductility. So the steel-concrete composite frame structure is applied more widely in engineering. The research on the seismic performance of composite beams and steel-concre columns becomes mature, but the research on the seismic performance of the steel-concrete composite frame structure is not perfect. On the base of exsiting reseach base about the steel-concrete columns and the composite beams, the article studys the seismic performance of steel-concre composite frame structure based on displacement, which offers some reference value for ascertaining its performance target, improving seimic criterion and offering theory foundation for designer.1,In inelastic static analysis, the article analyzes the veracity of force load mode and displacement load mode, puts forward displacement load mode, probes into the establishment of equivalent single degree system, and combining with equivalent ductility demand spectrum, the article advances~- improvement capacity spectrum method, at last the method is validated by dynamic time history analysis.2,On the existing theory base of steel-concrete columns and steel-concre composite beam, the article discusses the calculating method of the bending targer displacement and the terminal target displacement of steel-concrete composite frame structure under the effect of the earthquake,and puts forward the corresponding calculating method, the method is validated by dynamic time history analysis.3,Base on the existing design parameters of the RC frame structure, the steel-concrete composite frame structure is equated with the same bending stiffness, the carrying capacitys of the steel-concrete composite frame structure and the RC frame structure are compared, the seismic performance of the both is compared by dynamic time history analysis.