超长大跨连接体结构温度响应及结构抗震分析

结构超长使温度响应明显,为确定合理的结构方案需要对超长大跨连接体结构进行必要的温度响应分析。以北京市上地工贸楼为例,在满足建筑功能要求的前提下,设计了3种主体结构与连接体结构连接的方案;分析了各方案在温度作用下的结构整体变形,主体和连接体结构的层间位移角及楼板和部分构件的内力。分析表明,两种方案在考虑温度影响时,不能满足正常使用下变形的限制且连接体楼板内力过大,而一侧为铰支座、另一侧为有限单向滑动支座的连接方案合理。对所选用的结构方案进行了反应谱分析、小震下弹性时程分析和大震下弹塑性时程分析。结果表明,所选结构方案不仅较好地解决了大跨连接体结构超长的温度问题,而且能满足建筑抗震规范的要求。

Temperature Response and Seismic Analysis of Super-length Structure with Long-span Connecting Building

The temperature response of super-length structure with long-span connecting building is obvious,and it is necessary to conduct the temperature response analysis of the whole building.By taking Shangdi industry-commerce building as an example,three kinds of connecting projects are designed,and the whole deformation,drift angle of the main structure and the connecting structure,the internal forces of the floor and some members are studied under the thermal action.The results show that considering the thermal effects,two projects can't satisfy the deformation limit under the normal service condition and the connecting structural floor internal forces.The hinge support on one side and gliding surpport on the other side is selected as the fitting structure scheme.The seismic response spectra,elastro-time-history and elastro-plastic-time-history are made.The results illustrate that the selected scheme can overcome the temperature problem caused by the overlong structure,and satisfy the demands of the code for Seismic Design of Buildings.