铝合金板式节点初始刚度

Initial Bending Stiffness of Aluminum Alloy Gusset Joint

摘要:

铝合金板式节点变形分为节点板中心区域变形、节点板与杆件错动以及杆件自身变形三部分.对铝合金板式节点的受弯机理进行分析，得到节点初始弯曲刚度公式.在试验基础上，分析试件的抗弯性能，得到弯矩转角曲线.采用ABAQUES软件对节点进行数值模拟，数值结果与试验结果吻合较好.通过参数分析得知节点板厚度、杆件截面高度、螺栓数量及节点板半径对节点初始弯曲刚度的影响.最后将理论结果分别与数值结果和试验结果进行比较，验证了公式的合理性.

Abstract:

The bending deformation of aluminum alloy gusset joint could be divided into three parts: the deformation of the central area of the plate, the relative displacement between the plate and the member and the bending deformation of the member. The formula to estimate the initial bending stiffness of aluminum alloy gusset joint is proposed through analyzing its bending characteristics. According to the joint tests, the main mechanical behavior of moment rotation curves is investigated. Numerical simulations of the gusset joint are established through software ABAQUES. The initial bending stiffness obtained from the numerical results agrees well with the experimental ones. Based on single parameter analysis, the influence of the thickness of plate, the height of member, the number of bolts and the radius of plate on the out of plane initial bending stiffness of this joint are studied. Finally, the comparison of the theoretical results, the numerical results and the experimental results is carried out. It is indicated that the theoretical formula is suitable for the design of this joint.