Seismic fortification intensity has been adjusted in some areas which were affected in The Wenchuan-earthquake. It was seismic strengthening for most of the buildings especially the public buildings after the adjustment. In order to ensure the seismic performance of the structure after reinforcement ,the analysis method based on performance is gradually applied in the large and complex engineering structure analysis .The paper uses a large span Sports Training Center under construction as background. According to the situation that the fortification intensity by 6 degrees improved to 7 degrees ,the paper uses Push-over method to analysis elastic-plastic of the finite element models ,which including the mild steel damper before and after reinforcement ,under the action of the rare earthquake of 7 degrees. The paper is studying the internal force,deformation and destruction of the structure in the action of the rare earthquake,comparing the dynamic characteristics and seismic performance of the models, and researching distribution of weak links and plastic hinge of the models under the large earthquake. The results show that the models can meet collapse resistant checks less than 7 degrees of the rare earthquake before and after reinforcement. The second floor is relatively weak of the original structure,and can emerge local damage easily. But the structures stiffness is more uniformly after reinforcement, and has large resistance of the collapsed ability.
Study on the Influence Factors of the Seismic Performance with Specially Shaped Columns Under Rare Earthquake
