Experimental Research On Structural Behaviors Of The RC Shear Wall With Bi-directional Single Layer Reinforcement Under Low Axial Force Ratio

With development of society and economy, more and more high-rise buildings are erected. As high-rise buildings are to sustain large lateral and vertical loads, more strength and stiffness of the components are needed, In high-rise buildings, shear walls is usually the main component to resist lateral force. So many experts are concerning on how to improve the seismic performance of shear walls.Members at bottom of high-rise building are usually very large due to enormous vertical loads. In order to reduce sizes of these members and increase usage space, high-strength materials and new composite components are widely applied. With enough studies on behavior of high-strength concrete members, C80 and C100 concrete have been apllied succesfully in many constructuions in recent years. Composite shear walls with steel frame and steel plate in RC walls are also coming into use more widely. Many experts have done a lot of study works on both high-strength concrete member and composite shear walls, but the combination of them is hardly seen.This paper studied high-strength concrete steel composite shear wall which combines high-strength concrete and concrete-steel composite shear walls together. Low cyclic loading experiments on 11 high-strength concrete steel composite shear wall specimens with shear span ration of 1.5 were carried out. The failure characteristics, shear capacity, stiffness, deformability and energy dissipation of these specimens were studied. The test results showed that compared with general-strength concrete steel composite shear walls, high-strength ones had little change in ductility and slight fall in ultimate deformation capacity, but big rise in shear capacity. Then finite element models of these specimens were set up by software ABAQUS and the performances were analyzed. The analysis results were in accordance with test results. Based on experimental and analysis results, shear capacity and cooperation of reinforced concrete and steel plate of the specimens were studied. Finally, some design suggestions of high-strength concrete steel composite shear walls were proposed.