Seismic Evaluation And Reinforcement Of A Large Space Shear Wall Structure At The Bottom

In recent years,large-scale high-rise buildings at home and abroad have developed rapidly,and buildings have developed rapidly toward a comprehensive direction with complex body shapes and diversified functions.In the lower floors of some high-rise buildings,in order to arrange places such as shops and restaurants that require more space for activities,some shear walls are eliminated to form large space houses to meet people's needs for use of building houses.Such a structure is a large space shear wall structure at the bottom.Many scholars have studied the seismic design of the large space shear wall structure at the bottom,but the seismic identification and reinforcement research of such structures is not deep enough.In this paper,a large space shear wall structure is taken as an engineering example,and the hybrid analysis method is used as the principle of structural analysis.The shear distribution of the transition layer between the large space shear wall structure and the adjacent layer of the conversion layer is discussed.In order to investigate the internal force distribution of the frame-supported shear wall,the bottom frame pillar and the floor shear wall,the continuous grid method and the stiffness distribution principle were used to calculate the internal force.Based on the analysis principle and calculation method of the large space shear wall structure at the bottom,the JDJG module of PKPM software is used to seismically identify and strengthen the case structure.By analyzing the identification results of the structure,according to the strict reinforcement technical requirements,the corresponding technical measures are adopted to design the reinforcement of the structural members that do not meet the seismic requirements.After the reinforcement,the original model of the structure and the model after the reinforcement are compared and analyzed.According to the analysis results,the reinforcement scheme is optimized,and the position of the weakest part of the structure is found.Some reinforcement design suggestions for large-space shear wall structures at the bottom are provided,which have certain reference value in the reinforcement design of such structures.