Research On Key Technology And Application Of High-rise Shear Wall Structure Opening

In recent years,with the rapid development of China’s society,social and economic development is rapid,people’s living standards have also been greatly improved and enhanced,no longer meet the basic needs of food,clothing,housing and transportation.People’s requirements for the use of buildings have long been no longer limited to the most basic shelter,the use of the building function put forward more diverse requirements.Many existing buildings are slightly backward in use function.In order to better meet the needs of people’s production and living,it is often necessary to transform and upgrade the existing buildings.For the shear wall structure,due to the limitations of its structure,the use space of the shear wall structure is not flexible enough,so more and more shear walls need to be transformed by opening holes.On the one hand,opening the entrance of the shear wall structure reduces the shear resistance of the shear wall wall,and destroys the integrity of the original structure,and reduces the seismic performance of the original building structure.Therefore,it is very necessary to analyze the mechanical performance and seismic performance of the shear wall after opening the hole.The study of this kind of problem in this paper provides a theoretical basis for similar reinforcement and reconstruction projects,which has important theoretical and practical significance.This paper,taking a 17 th floor in hebei province office of reinforced concrete frame shear wall structure reform project as an example,through the finite element analysis,the engineering construction of shear wall is open hole study,choosing three different open hole model,from the aspects of open hole shape,size and position a few after the analysis of shear wall structure on the influence of the hole on the structure performance and seismic performance.Modal analysis and seismic simulation of three dimensional finite element models of shear wall structures with different openings are carried out by ANSYS software.The main analysis is divided into the following aspects:(1)With the help of ANSYS finite element software,the original shear wall structure before opening the hole and the shear wall with different openings of different floors were modeled by finite element,and the modal analysis of the finite element model was carried out.(2)In this paper,the modal analysis of the structural finite element models with various openings is carried out,and the first six frequencies,the first three modes and the main modes in all directions of the models with various openings are analyzed and studied.(3)The average interstorey displacement Angle,average displacement and interstorey shear force of each floor of each model under the action of Tianjin wave were analyzed.(4)Taking a practical project as an example,reasonable and reliable reinforcement measures are taken to analyze the stress and seismic performance of the reinforced structure,and compare with the original structure to verify the effectiveness of the reinforcement scheme.