铝合金板式节点受弯承载力试验研究

从理论上提出了铝合金板式节点在面外弯矩作用下的抗弯承载力计算公式.进行了4个铝合金板式节点试件试验,其中3个试件只承受面外弯矩,一个试件同时承受面外弯矩和剪力,得到了板式节点的受力性能,归纳了板式节点在面外弯矩作用下和弯剪联合作用下的破坏模式主要为:杆件受弯破坏、节点板块状拉剪破坏和节点板的屈曲破坏.通过试验数据分析,得出了反应撬力对其极限承载力影响的折减系数k1的取值范围,并验证了承载力计算公式的准确性.针对4个板式节点试件的试验,采用ABAQUS有限元软件建立了有限元数值分析模型,分析了其极限承载力,补充和完善了试验研究.

Experimental Research on the Bending Capacity of Aluminum Alloy Gusset Joints

The formula for the bending capacity of aluminum alloy gusset joints loaded by out-plane bending moment was proposed theoretically. The experiments on four aluminum alloy gusset joints, three loaded by out-plane bending moment and one loaded by shear force together with out-plane bending moment, were conducted. The possible failure modes of the gusset joints were presented, which are as follows: member bending failure, joint plate block shear rapture failure and joint plate bucking failure. Based on the test results, the range of k1, which represents the reduction of the bending resistance caused by prying action, was proposed, and the formula for bending capacity was verified. Correspondingly, 4 finite element models were established by finite element software ABAQUS as a supplement of the experimental studies.