Experimental Research On The Seismic Performance And Performance Index Limits Of I-section Rc Shear Wall

Shear walls are commonly used structure system in high-rise residential building. They are the front line of withstanding earthquakes; their deformation has a vital effect on structure seismic performance. The specifications in force concerning performance-based seismic design has not yet quantified deformation performance indices of irregular-shaped RC shear walls and their limits. Our team has researched on and proposed deformation index limits using finite element analysis for rectangular, T-section and L-section shear walls. Due to the natural uncertainty of concrete, hence reinforced concrete members, and during the fabrication and casting of RC shear walls, it is evident that there is huge distinction finite element simulation cannot take into account between seismic performance of the same batch of RC shear walls. Therefore, it is necessary to do the experiments to research on the deformation indices of Isection RC shear walls. The contents of this dissertation are as follows:(1) Summarizes the performance based seismic design method and the latest research of domestic and foreign scholars on I-shaped RC shear walls.(2) According to the requirement of the specifications, through changes in shear-span ratio, axial compression ratio and longitudinal reinforcement ratio, 8 pieces of I-section RC shear walls were designed for quasi-static cyclic tests and experimented.The damage, stress, deformation capacity, ductility, stiffness degradation and energy dissipation of I-shaped RC shear walls are studied.(3) According to the experiment results, six performance levels of I-section RC shear wall are determined: intact, slightly broken, light medium broken, medium broken, severe broken and invalid. And according to the skeleton curve result, the index limits are determined along with the corresponding description of damage,proved the feasibility of this method.(4) Index limits of I-section RC shear walls are compared to the experimental result of rectangular and T-section RC shear walls and ASCE41-13, evaluated the differnces of three sections of RC walls indexs, providing reference for engineering practice.(5) ABAQUS is applied to simulate 8 I-section RC shear wall, comparision of load-displacement curve and failure modes of the specimens between the calculated result and experimental result, found that the the experimental result agreed well with the calculated result. It is indicated that the calculated result of I-section RC shear walls simulated by using ABAQUS is credible when suitable material constitutive models andparameters are selected.