Pseudo-Dynamic Experimental Research On Seismic Behaviors Of Steel Reinforced High Strength And High Performance Concrete Frame Structure

The steel reinforced high strength and high performance concrete(SRHSHPC) structure is a kind of new composite structure that applies high strength and high performance concrete(HSHPC)to the steel reinforced concrete(SRC)structure.This type of structure system can make full use of the excellent mechanical behavior and high durability of the HSHPC.Comparing with normal concrete,the interface between steel and concrete is effectively strengthened and the interfacial bond stress is largely improved,which makes the cooperative work between steel and concrete much better. Moreover,part of the concrete is well restricted by the embedded steel,and its mechanical properties are great improved.The research on the SRHSHPC structure may contribute to the development of the composite structure,as well as its application in the structure engineering.In order to study the seismic behavior of this high strength and high performance concrete frame structure,this paper performed pseudo-dynamic test of a 1/4-scale two-bay three-story steel reinforced high strength and high performance concrete frame structure model with the strength grade of C80 to simulate the seismic responses by using the MTS Electro-Hydraulic Servo Loading System.This test can be used to study the seismic responses of this structure under strong earthquake.Besides,it can also be used to check the influences on its dynamic response and load capacity given by peak ground acceleration,spectrum characteristics and duration of strong shaking.Based on the pseudo-dynamic test results and the theory of high-strength steel and high-performance concrete columns,the dynamic analysis model and the hysteretic model suitable for the steel reinforced high strength and high performance concrete frame structure have been established,using finite element software of SAP2000 to make elastic-plastic seismic response analysis of this steel reinforced high strength and high performance concrete frame structure,and compared with the results of pseudo-dynamic test.Analysis results show that SRHSHPC frame has good seismic behaviors.The hysteretic model proposed in this paper can be a good reference to seismic design of SRHSHPC structures.All these research results may contribute to the improvement of the dynamic characteristics and calculating theory of the steel reinforced high strength and high performance concrete(SRHSHPC)integral structure,and can be applied in the finite-element method analysis of steel reinforced high strength and high performance concrete structures.