铝合金板式节点面外初始弯曲刚度的杆件间交互影响

铝合金板式节点具有良好的整体刚度性能，其面外初始弯曲刚度的杆件间交互影响不容忽视.本文在现有研究的基础上，定义了铝合金板式节点面外弯曲刚度矩阵.为进行深入研究，对铝合金板式节点进行有限元模拟.以节点板厚度、节点板半径、杆件高度和螺栓数量为参数，建立14个节点模型，分析关于节点面外弯曲刚度的杆件间交互影响.根据有限元结果，提出计算杆件交互影响程度的理论公式.和有限元结果的比较表明，公式的计算精度高，具有良好的适用性.
The aluminum alloy gusset joint has a good global stiffness performance, so the out-of-plane initial bending stiffness interaction of members cannot be neglected. Based on the existing research, the matrix for the bending stiffness of aluminum alloy gusset joint was defined, and the finite element (FE) analysis was developed. Fourteen FE models of aluminum alloy gusset joint were established to discuss the bending stiffness interaction of members, taking into account the thickness of plate, the radius of plate, the height of member’s cross-section and the number of bolts. According to the FE results, the theoretical formulae to estimate the bending stiffness interaction of members on the aluminum alloy gusset joint were proposed. Making a comparison of the theoretical results with FE results, the theoretical results have a good agreement with the FE results, which verifies the applicability of the proposed formulae.