Short-limb Shear Wall Coupling Beams In A Rare Earthquake Inelastic Response Analysis

With the improvement for requirements of the using function and area as well as room combination of buildings from people,the structure of a short-leg shear wall is widely used in the Sunan region and Beijing,Shanghai and Guangzhou.The connected-beam is the beam that links one wall limb to another in the structure of a short-leg shear wall.Based on a lot of test results, The connected-beam is an easily destroyed component part in the structure of a short-leg shear wall.Because theortical research on the structure of a short-leg shear wall is not well completed until now, the spacial element stiffness matrixes on both the short-leg shear walls for shapes of T,L and rectangle section and a connected-beam are induced from the improved multi-vertical rods model and a new connected-beam model in the structure of a short-leg shear wall.Program for analysis of time history response on the structure of a short-leg shear wall under the seismic action has been made by using MATLAB language. Analysis of the non- linear finite element for the structural model of a short-leg shear wall is done by using ANSYS software.The main conclusions in this paper are following:1. When the ratio of height to span in a connected-beam decrease,both integration and carrying capacity of the structure become decreasing,but its ductility become increasing.If the width of connected-beam section is increased,the largest displacement of the structure is decreased ,and its integration is also increased.2. When the ratio of reinforcing bar at the end of a connected beam increase,both the largest displacement and ductility of the structure become decreasing,but its carrying capacity become increasing.If the ratio of reinforcing bar at the end of a connected beam is properly increased from the requirements,the early destructions at the end of a connected beam will be improved.3. The fracture-load and yield-load as well as limit-load will gradually increase with the increase of the ratio of height to span in a connected-beam. After the ratio is increased into a limited one,their increasing extent will become decreasing. The fracture-load and yield-load as well as ductility on a connected beam will increase with the decrease of the number of holes on a connected beam in the structure of a short-leg shear wall,and the ductile destruction of the structure happens.