摘要
襄阳东高铁站钢屋盖南北向长358m、东西向宽124~178m,最大跨度为86m,采用焊接球曲面网架结构,整体不设变形缝,南端开设瀑布形大洞口。由于屋盖结构具有超长、不连续、大悬挑及瀑布造型等特点使得屋盖空间受力十分复杂,开展结构选型研究,对洞口两侧结构进行加强、支座与节点进行特殊设计,并处理幕墙传力关系以优化结构整体性。静力计算、稳定性分析及多维多点激励时程分析表明,屋盖承载能力、稳定性及抗震性能良好。抗连续倒塌分析显示,拆除2号柱会导致大瀑布区域倒塌,通过局部加强法解决。施工与运营阶段的健康监测结果表明,屋盖变形、应力及振动指标均处于安全范围内。
The steel roof of Xiangyang East High⁃Speed Railway Station features a north⁃south length of 358m,east⁃west width of 124-178m,and maximum span of 86m,adopting a welded spherical curved grid structure without deformation joints,with a waterfall⁃shaped large opening at the south end.Aiming at the complex stress issues caused by super⁃length,discontinuity,large overhang,and waterfall shape,structural selection research was conducted.Strengthening measures for both sides of the opening,special design of supports and joints,and force transfer treatment between curtain walls and the roof were implemented to optimize integrity.Static calculation,stability analysis,and multi⁃dimensional multi⁃point excitation time⁃history analysis show that the roof has good bearing capacity,stability,and seismic performance.Anti⁃continuous collapse analysis reveals that removing column 2 leads to collapse of the great falls area,which is solved by local strengthening.Health monitoring during construction and operation stages indicates that roof deformation,stress,and vibration indexes are within safe ranges.
作者
彭俊
PENG Jun(China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan 430063,China)
出处
《建筑结构》
北大核心
2025年第17期16-23,共8页
Building Structure
关键词
超长钢屋盖
大开洞结构
抗连续性倒塌
多维多点激励
结构健康监测
super⁃long steel roof
large⁃opening structure
anti⁃continuous collapse
multi⁃dimensional multi⁃point excitation
structural health monitoring
