Seismic Performance Evaluation Method Of High-rise Building Structure Based On PERFORM-3D

The current code of our country contains some performance based seismic design ideas,but it still use the traditional method of seismic design theory.To a great extent,the method can make the structure"no collapsing under strong quakes",but it can not reflect the actual seismic performance of the structure under the strong earthquake,especially the performance status of the component.The structural seismic idea based on the performance index of the component make up for the shortcomings of traditional seismic design methods,the real reaction of the structure and component can be accurately obtained.In view of this,the seismic performance evaluation method of high-rise buildings based on PERFORM-3D is proposed in the paper,and the seismic behavior of the regular high-rise frame structure is studied from two levels of structure and member deformation by using the dual index of the story drift and the plastic rotation of members.the main contents and conclusions are as follows:(l)This article lists the previous examples of earthquake disaster,combining with the current research status of the performance-based seismic design and evaluation theory,and points out the shortcomings of the existing methods.According to the design method of the deformation capacity on components,the limit value of the deformation capacity is calculated,as the deformation capacity index of the component under the performance level of collapse prevention.The seismic evaluation method of component deformation capability index is proposed,and the basic steps of implementing the method based on PERFORM-3D are given.(2)A performance evaluation method based on PERFORM-3D is proposed by combining the structural deformation index,and the seismic behavior of high-rise frame structure under large earthquake is analyzed by this method:According to the analysis of the story drift and energy dissipation,the structural deformation can meet the requirement of the standard limit,and the whole structure has good seismic performance;Through acquiring the deformation utilization rate of structural members,namely the ratio of component deformation capacity and deformation demands under the seismic response,that of beam and column was less than 100% and average value was less than 40%,and the structural deformation has large surplus;Through the analysis of the component hysteretic energy consumption,the energy consumption of beam is much larger than that of column.The above analysis shows that the regular high-rise frame structure of the first grade seismic that the code rules meet the deformation requirements of structure and component,and the surplus amount is more.The structure is in line with the failure trend of strong column and weak beam.(3)According to the lateral deconstruction rules of the frame structure and the maximum story drift got from elastic-plastic time history analysis,the corresponding deformation demands of the component can be calculated. Through comparing with the limit value of component deformation capacity,the above method of calculating the component deformation capacity is verified with which is not exceeding the maximum component deformation capacity.According to the performance analysis of RC frame structure,That the paper presents a method for evaluating structure performance based on PERFORM-3D has the advantages of both model accuracy and computational efficiency,and easy to determine the performance index,So it can be used to design and evaluate the performance of existing or new RC frame structures.