Seismic Performance Study Of Frame-Supported Shear Wall Based On Deformation Of Component

The current seismic design method in our country is that,the elastic calculation under small earthquake as well as the related details of seismic design is used to meet the security requirements of structure and the target of no damage under frequent earthquake,repairable damages under basic earthquake and no collapse under rare earthquake. But it can’t assess the damage and performance of the structure quantitatively under strong earthquakes by this kind of design method. This paper put forward the assessment method of seismic performance based on the component deformation, which can make up for the deficiency of the current design method. By using the assessment method, it helps to make more accurate understanding of the real structure damage under rare earthquake and the actual seismic capacity evaluation of structrue, to provide the feasible ideas and method for seismic design based on performance.According to the seismic performance evaluation method based on component deformation index, this paper studies the seismic performance of frame-supported shear wall structure through the elastic-plastic time-history analysis by means of PERFORM-3D.The main research content is as follows:(1)Integrating the thought of the performance-based seismic design, define the performance index value of concrete components, divide the performance state, determine the evaluation process and put forward the seismic performance evaluation method based on component deformation index.(2)According to the requirements of the current code, design twenty eight frame-supported shear wall structures, which has number of floors, seismic fortification intensity, characteristic site period and the location of transfer floor as variables. Select twenty seismic waves for each structure model and carry on the elasto-plastic analysis under severe earthquake. Then verify the validity of the elasto-plastic analysis model and the calculation results.(3)Divide twenty eight models into A, B two groups and analyze the calculation results of the elastic-plastic time-history analysis by group. For group A with twenty four models in three variables including storey height, seismic fortification intensity, characteristic site period, mainly analyze the distribution law of inter-story displacement angle and the performance state of beam, column as well as shear wall. For group B including four models of different location of transfer floor, mainly analyze the influence of the transfer floor location on period, vibration mode, inter-story displacement angle and the performance state of different component. Finally, analyze the performance state and seismic safety of frame-supported shear wall designed in Chinese code under severe earthquake.(4)For the deficiency of the method of selecting seismic waves in elastic-plastic time-history analysis, this paper puts forward Long-Period Spectrum Fitting Confficient, which can reflect the fitting degree of spectrum between seismic wave and code. By using the cofficient, the selection method of seismic wave in elastic-plastic time-history analysis is summarized.