Seismic Response Analysis And Experimental Research On Frame Supported Shear-Wall Energy Dissipation And Seismic Mitigation Structures

In order to meet the architectural needs of buildings, high-rise buildings of the frame-supported shear wall structure with large bays at the bottom are widely used in modern buildings along the street. This structure was designed to be the large bays at the bottom of the frame structure in the form of architectural, with only a small amount of shear wall, thus forming large bays place as a business, restaurants, banks, post offices and other service uses, and the upper structure to be shear wall structure, forming small bays can be used for housing hotels, such as residential or office space to meet the use of architectural features. But, from the structural force point of view, for high-rise building, the substructure endure relatively large force, the superstructure small force, therefore we hope the stiffness of the building to be strong at the bottom and relatively weak at the upper structure, furthermore, we hope the stiffness of the building changed equably. Contrary to this idea, frame-supported shear wall structure has a character that the stiffness of the bottom is relatively small, the upper is large, and the stiffness of the structure changed suddenly at the transfer story. When suffered horizontal earthquake force, these structures were often caused destruction, and even lead to entire collapse, due to weak stiffness at the bottom. Therefore, it is a hot topic in both architectural and structural field that how to solve the problem of this structure under earthquake, as well as the dynamic characteristics and seismic behavior of the structure.This paper presents a method of energy dissipation and seismic mitigation technique to solve the problem of frame-supported shear wall structure under earthquake, that is, install a certain amount of energy dissipation damper into the frame part of the structure, named as energy dissipation and seismic mitigation structure. We are going to do some research on seismic response of this structure under frequent and rare earthquake.The research works in this paper include:(1) Based on existing achievements of energy dissipation and seismic mitigation structural research about analysis and design, analysis and design methods for large bays frame supported shear wall energy dissipation structure were researched, including elastic analysis under frequent earthquake and elasto-plastic analysis under rare earthquake; (2) 3D models of a typical frame-supported shear wall structures were erected with SAP2000, a finite element software, and elastic time history analysis were processed under frequent earthquake. Displacement, acceleration response and hysteretic behavior of dampers were compared;(3) Simplified two-dimensional model were erected in SAP2000 and elasto-plastic seismic response analysis were processed, the nonlinear characteristics of both structure and dampers are analyzed in this model;(4) A real energy dissipation model was designed, experiment of frequency sweep shaking table was conducted, aimed at checking the effect of this system.Results of analysis and experiment show that the energy dissipation damper can effectively reduce the seismic response of the entire structure, through rational design, this system can achieve good effects that most energy inputted in structure was dissipated by dampers, and the main structure was protected, safety degree was enhanced.