【摘要】 某体育场西侧罩棚采用倒三角形空间桁架拱作为其长跨方向的主承重结构体系,屋面结构通过短跨方向的桁架梁支承于该桁架拱的下弦,主桁架拱的拱脚支撑于两端地面基础,结合独特的建筑造型,主拱桁架在竖向平面内还以一定的角度倾斜。针对主桁架拱在本工程中的重要性,设计中除了考虑满足各项常规要求,同时还进行了基于不同拱脚支座刚度的对比分析。分析结果表明,在拱脚支座刚度满足一定要求时,本工程罩棚钢结构的整体稳定性能和抗震性能可以得到保证。更多还原

【Abstract】 Arch of conventional triangular space truss is used to support steel canopy of a stadium. The roof is supported on the lower chord of the truss arch by the short span truss-beam, and the arch foot of the main truss arch is supported on the ground foundation at both ends. Due to the unique architectural style, the arch should be slanted at RC structure of stadium stands. Static analysis was accomplished according to demands of design specifications,and more detailed studies on the different stiffness of the arch foot support were conducted thereafter. The results show that the overall stability and seismic performance of the steel structure can be guaranteed when the rigidity of arch foot support meets certain requirements.更多还原