温度和支座沉降对将台花园拱壳杂交钢结构承载性能的影响分析

Analysis on Effect of Temperature Loads and Support Settlements on Load Capacity of Arch-Reticulated Shell Hybrid Steel Structure of Beijing Jiangtai Winter Garden

对于大跨度空间结构而言,温度荷载和支座沉降在结构中引起的变形和内力不可忽略。北京将台冬季花园主要包括屋面钢网壳和立面玻璃幕墙。其中网壳部分由九榀空间钢拱和普通壳体杆件组成,可以看作拱壳杂交结构。钢拱两端分别支撑于钢柱和混凝土墙体顶端,玻璃幕墙固定于竖向拉索。本文选取了包含温度荷载和支座沉降的部分工况,运用ANSYS有限元软件对结构进行了静力分析。对比分析结果表明,与支座沉降相比,温度荷载对结构的承载性能有更大影响。同时本文的分析结果也充分体现了杂交结构性能的优越性。

To large span spatial structures, the displacement and internal force caused by temperature loads and support settlements can not he ignored. Beijing Jiangtai Winter Garden mainly consists of reticulated shell and glass curtain wall. The reticulated shell is composed of 9 spatial arches and other common frames, thus it can be considered as arch-reticulated shell hybrid structure. The two ends of the arches are supported at the top of steel columns and concrete wails respectively. The glass curtain wall is fixed to vertical cables. This paper chooses several load cases including temperature loads and support settlements, and uses the software of ANSYS to analyze the static response of the structure under such load combinations. The comparative results show that temperature loads have more effect on the structure＇s load capacity than support settlements. And the superiority of hybrid structures is fully embodied in the conclusions of this paper.