摘要
通过对旋转盘口式扣件桁架进行足尺场地堆载试验研究,结果表明:在试验加载条件下桁架整体承载性能良好,受力及变形呈现对称性;杆件连接间隙对桁架挠度和杆件应力影响较大。基于旋转盘口式扣件桁架试验数值模型,应用有限元软件对桁架进行分析,旋转盘口式扣件桁架计算值与试验值吻合较好,建模和计算方法可行;对桁架进行施工安全分析,在分段施工过程中,桁架最大挠度和最大承载力均出现在第三阶段,且均满足要求。
The full-scale test of the truss with rotary dish-type fastener was carried out. Based on the test numerical model of the truss with rotary dish-type fastener, the three dimension finite element model was established and the finite element analysis was carried on by finite element software. It indicated that the truss had higher strength, the stress and displacement of the truss present symmetric, the connecting gap of the chord bar had great influence on the displacement of the truss and the stress of the chord bar, and the computation value coincided well with the experimental value which meant geometrical modeling and mesh-plotting were proper and feasible. It found that the maximum deflection and maximum bearing capacity of the truss appeared in the third stage, which met the requirements in the process of section construction.
出处
《工业建筑》
CSCD
北大核心
2015年第7期132-137,共6页
Industrial Construction
关键词
旋转盘口式
筒仓仓顶
桁架
位移
应力
rotary dish-type
silo top
truss
displacement
stress
