西宁市公共事务受理中心混合结构设计

摘要

为了满足建筑造型、内部使用空间以及悬挂重载等要求,西宁市公共事务受理中心采用钢筋混凝土框架结构主体和钢桁架大跨度屋盖的混合结构体系.对该受理中心结构体系的分析和设计有关内容进行了介绍.通过对单独模型和整体模型的结构受力和变形的对比分析,得出了钢-混结构体系之间协同工作对整体结构性能产生的影响,验证了钢结构屋盖可以通过合理设置隔震球型钢支座和单向滑动支座等支承于下部钢筋混凝土框架结构之上,能最大限度地降低上部钢结构屋盖与下部钢筋混凝土框架由于各自不同的结构特性而产生的不利影响.有关分析和设计方法可供其他类似工程参考.%The large span roof of affair service center adopts steel truss system,while others adopt the RC frame structure,in order to meet the requirements of architectural outline,usage of the inside space and large suspension load.The analysis and design optimization of Xi'ning public affair service center is presented in this paper.Isolated model and structural integral model are both analyzed to make comparison of the structural load-bearing performance and deformation.The effects of collaborative work are reflected.Through a series of seismic isolation sphercal bearing and sliding bearing based on the RC frame structure,the disadvantages,caused by the dit characteristic of the upper part of the steel roof and the lower part of RC structure,are reduced furthest.The analysis and design method used in this paper could be a reference for the similar projects.