81.9m跨度钢结构连体设计关键问题研究

Research on key issues of 81.9m-span steel connected structure design

通过对一个81.9m大跨度钢结构连体与其两端主楼不同连接方式的特点及两端主楼具体情况进行分析,确定连体与其两端主楼采用弱连接方式;根据连体功能要求及平立面布置情况,确定连体采用钢桁架结构形式;通过对连体两端主楼进行大震作用分析,确定连体支座具体设计参数,并通过采用TMD系统对连体进行减振优化设计,解决了连体在人行荷载下的共振问题。

By analyzing the characteristics of different connection modes of an 81. 9 m large-span steel connected structure and its main buildings at both ends,and analyzing the specific conditions of the main buildings at both ends,it was determined that a weak connection mode was adopted to the connecting body and the main buildings at both ends.According to the requirements of the connected body function and the flat facades in the layout,it was determined that steel truss structure was used for the connected body. Through the analysis of the main buildings at the two ends of the connected body under the rare earthquakes,the specific design parameters of the connected bearing were determined,and the vibration-damping optimization design of the connected body was implemented using the TMD system to solve the problem of resonance of connected body under human loads.