The Study On Hysteretic Behavior Of Steel Frame With Ductile Fiber Reinforced-concrete Infill Shear Wall Structure

The steel frame with ductile fiber reinforced-concrete infill shear wall (SDFRCW)is a kind of composite structural system, which has improvement seismic behavior byitself than excellent deformation capacity and high energy dissipation capacity. Comparedto steel frame with reinforced-concrete infill shear wall, the proposed SDFRCWstructure had more advantages as an earthquake-resistant system in seismic regions.Hence, the study on the hysteretic behavior of SDFRCW structure has important valueon its theory and practice. This paper researched systematically the hysteric behavior ofSDFRCW based on test investigation and theory analysis, and the main findings aresummarized in the following:(1) The failure mechanism, energy dissipation capacity and deformation capacityfor one set of SDFRCW specimen were investigated by the quasi-static cyclic tests.Experimental results indicates that: SDFRCW specimen could effectively make use oftensile strain-hardening behavior with multiple cracking of DFRC, and controldevelopment of shear incline crack and improve deformation capacity, Also it couldreduce inelastic deformation of steel frame, and enhance seismic behavior and damagetolerance of structure in order to avoid expensive repair expenses after strongearthquakes.(2) The infill DFRC shear wall bear the overall lateral load by90%~80%approximately, and the steel frame bear80%~95%of the overturning moment based on the analysis of testing data. The steel frame with ductile fiber reinforced-concrete infillshear wall improved mechanical performance than the steel frame withreinforced-concrete infill shear wall, which made infill shear wall bear the overalllateral load almost entirely and made the steel frame bear the overturning momentalmost entirely.(3) The initial stiffness calculation functions of both overall structure andinterstory were established based on the basis of the experimental investigation anddeformation analysis of SDFRCW, and theory results agree well with the results of test.(4) Based on the experimental failure process and interstory drift, the performanceindex limits of each load-deformation stage of SDFRCW specimen were present. theperformance index limits of each load-deformation stage of SDFRCW that don’t hasembedded column and embedded beam are much higher than PSRCW-1that hasembedded column and embedded beam, which proved that the steel frame with ductilefiber reinforced-concrete infill shear wall can obviously improved deformation capacitythan the steel frame with reinforced-concrete infill shear wall.