某钢桁架低位连体结构分析与设计

Analysis and design of a low connected structure with steel truss

成都某项目为双塔低位连体结构。连接体跨度、高度、宽度较大,受力较为复杂。为了满足建筑功能要求,连接体部分选用钢桁架结构体系。根据工程特性,对结构设定了适宜的性能目标,针对连接体钢桁架进行了设防烈度地震下中震弹性和大震不屈服的计算分析;针对桁架结构关键节点进行了补充分析;对连体舒适度进行了专项分析。分析结果表明,结构受力和抗震性能满足要求,安全可靠、使用舒适并具有较好的经济性。

A project in Chengdu consists of two towers connected as low altitude. The span,height and width of the connected structure are relatively large and mechanical conditions are relative complex. In order to meet the functional requirements of the building,the steel truss structural system is used in the connected part. According to the engineering characteristics,the optimum performance targets were set up,and the elastic analysis under the medium earthquake and non-yielding analysis under the rare earthquake were carried out on the connected steel truss structure under the condition of fortification earthquake. A supplementary analysis of the key nodes of the truss structure was carried out. A special analysis of the comfort degree of the connected structure was performed. The analysis results show that the structural mechanism and seismic performance meet the requirements with safety,reliability,comfort and good economic performance.