建筑结构学报2017，Vol.38Issue(7)：9-15,7.DOI:10.14006/j.jzjgxb.2017.07.002
铝合金板式节点网壳稳定承载力试验研究
Experimental study on buckling capacity of aluminum alloy gusset joint dome
摘要
Abstract
To investigate the influence of aluminum alloy gusset (AAG) joint stiffness on the buckling behavior of single-layer reticulated domes,a K6 dome with 8 m span and 0.5 m height was designed.The test dome was subjected to unidirectional cyclic load at central joint.It is found that the dome exhibits a super rigid behavior initially,indicating that its stiffness is higher than that of a shell with rigid joint.However,the joint deformation caused by bolt slipping could weaken the shell stiffness,and the shell deformation caused by bolt slipping is large and unrecoverable.The dome buckling belongs to the snap-through buckling,resulting in the larger shell bearing capacity of the post-buckling phase.The dome is collapsed by the fracture of the bottom flange of members near the loading joint at last.In addition,the dome initial stiffness is decreased in the order of the unidirectional cyclic loading process.The FE dome model was established in the ANSYS program,with its element simulated using BEAM 188 and COMBINE 39,considering the four-line joint bending stiffness.The FE results agreed well with the test ones.According to the FE results,it is indicated that the AAG joint stiffness should be considered in the design of the single-layer reticulated domes.关键词
铝合金板式节点/网壳试验/单向循环荷载/跳跃失稳Key words
aluminum alloy gusset joint/dome test/unidirectional cyclic load/snap-through buckling分类
建筑与水利引用本文复制引用
熊哲,郭小农,蒋首超,罗永峰..铝合金板式节点网壳稳定承载力试验研究[J].建筑结构学报,2017,38(7):9-15,7.基金项目
国家自然科学基金项目(50908168,51478335). （50908168,51478335）
