江门站复杂支承屋盖结构稳定及抗连续性倒塌分析  

Stability analysis and anti-continuous collapse analysis on complex supporting roof structure of Jiangmen Railway Station

作　　者：宋怀金[1] 刘桥[1] SONG Huaijin;LIU Qiao(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《建筑结构》2022年第1期17-23,共7页Building Structure

摘　　要：江门站站房是由上部空间钢结构和下部钢筋混凝土结构组成的混合结构体系。空间钢结构包含顶部大悬挑钢网架屋盖和钢筒壳支承屋盖结构,钢筒壳支承屋盖结构空间尺寸大,杆件受力复杂,结构冗余约束度不高。为了得到整体空间钢结构的稳定性能水平和抗连续倒塌能力,对整体空间钢结构进行了屈曲特征值分析、非线性屈曲分析及抗连续性倒塌分析。结果表明,钢筒壳杆件面外计算长度系数小于1.6,整体空间钢结构具有较高的整体稳定性和刚度,对初始缺陷不敏感;单根关键杆件失效后,结构仍具有一定的抗连续倒塌能力,结构安全可靠。The Jiangmen Railway Station is a mixed structure system composed of upper spatial steel structure and lower reinforced concrete structure. The spatial steel structure consists of a large cantilever steel truss roof and a steel cylinder-shell supporting roof structure, steel cylinder-shell supporting roof structure has the characteristics of large space size, complex state of members under load and low degree of structural redundancy. In order to obtain the stability performance level and anti-continuous collapse of the whole spatial steel structure, buckling eigenvalue analysis, nonlinear buckling analysis and anti-continuous collapse analysis were carried out for the whole spatial steel structure. The results show that the out-of-plane calculated length factor of steel cylinder-shell members is less than 1.6. The whole spatial steel structure has higher integral stability and stiffness, and is not sensitive to initial defects. After a single key member fails, the structure still has a certain ability of anti-continuous collapse, and the structure is safe and reliable.

关 键 词：编织状钢筒壳 特征值分析 初始缺陷 非线性屈曲分析 拆除构件法 抗连续性倒塌分析 

分 类 号：TU398.7[建筑科学—结构工程]