甘肃省体育馆比赛馆结构设计与分析

甘肃省体育馆由比赛馆和训练馆组成,比赛馆具有平面尺寸大、内部空旷、屋顶吊挂荷载分布广的特点。对该工程结构设计中的关键技术问题进行了介绍,主体结构选用钢筋混凝土框架结构,内场上空屋盖选用钢桁架结构,桁架支座选用可滑动弹性抗震球形铰支座,休息厅选用悬挂结构。主桁架为平面桁架,考虑到建筑功能的可变通性,设计时计入了均布吊挂荷载和固定吊挂荷载,通过稳定桁架和次梁的设置,对主桁架起到了较好的约束作用。稳定分析表明,桁架失稳时仅产生节间的杆件失稳,不会发生整体失稳。建设场地具有Ⅱ~Ⅳ级自重湿陷性,采用了强夯消除部分湿陷性+桩基础的综合方案,兼顾了可靠性和经济性。

Structural design and analysis on the competition hall of Gansu Stadium

Gansu Stadium is composed of the competition hall and the training hall. The competition hall has large flat size,open interior space and wide distribution of suspended roof load. The key technical issues for structural design were introduced,the main structure adopts reinforced concrete frame structure,the large span roof adopts steel truss structure with sliding elastic seismic spherical hinge bearing,and the lounge adopts suspended structure. The main truss adopts planar truss which is well constrained by the stabilizing truss and secondary beams. In order to meet the variable architectural features,both the uniform suspended load and fixed suspended load were considered. Therefore,the structural stability analysis indicates that the truss instability occurs on single member between rod section instead of overall instability. Construction site has Ⅱ ~ Ⅳ stage wet collapsible property,the dynamic compaction was used to eliminate partial collapsible property and pile foundation was adopted as a integrated program to ensure the reliability and economy.