Experimental Study And Theoretical Analysis On Seismic Behavior Of Steel Frame-prefabricated Reinforced Concrete Infill Wall

Steel frame-prefabricated concrete infill wall is a dual system to resist lateral force whichis composed of steel frame, prefabricated concrete infill wall and connection between them.The infill wall is connected to the frame beam with connecting plate by frictionalhigh-strength bolts or welding, and not connected to the frame column. This connection modeis helpful to remove or repair infill wall after the earthquake and the arrangement of windowand door holes. In order to reduce wet homework and construction period, achieve residentialindustrial production and improve comprehensive benefits, the infill wall can be prefabricatedin factory, then installed at the same time as the steel frame. According to different concretematerials, steel frame-prefabricated concrete infill wall can be divided into steelframe-prefabricated reinforced concrete infill wall(SPRCW) and steel frame-prefabricatedfiber reinforced concrete infill wall(SPFRCW). At present, the research on SPRCW is lesswhile the research on SPFRCW is blank at home and abroad.In this paper, a cyclic loading test was conducted on two samples of the single span-layerSPRCW and two samples of the single span-layer SPFRCW, hysteretic behavior, bearingcapacity, stiffness, ductility, energy absorption capacity and force distribution analysed, andfailure mode put forward.Based on the experimental study, the finite element simulation to test specimens wascarried on by ABAQUS. Finite element analysis results were compared with test results tovalidate the correctness of the finite element modeling method. Finally, used the modelingmethod to study the influencerule of several factors, such as the height-width ratio, thicknessand separate arrangement of infill wall, single wall spacing and the mechanical property offiber reinforced concrete. The results showed that decreasing the height-width ratio of infillwall could improve structural seismic behavior obviously. In order to achieve ideal failuremode, good deformability and energy absorption capacity, the height-width ratio should bemore than1.36, and less than3.6when infill wall was arranged separately. Because thethickness of infill wall has only a limited effect on structural seismic behavior, so we can usethickness of infill wall in general range. The separate arrangement of infill wall could reducestructural bearing capacity and stiffness while enhancing ductility. In addition, enlarging the single wall spacing could reduce the stiffness and energy absorption capacity. Using fiberreinforced concrete whose strength rank is low instead of common concrete could improvestructural bearing capacity, stiffness and ductility effectively while the energy absorptioncapacity wouldn’t be reduced apparently.