（1 同济大学建筑工程系， 上海 200092； 2 上海通正铝合金结构工程技术有限公司， 上海 201103）

［摘要］铝合金板式节点是典型的半刚性节点，其在网壳平面内的抗弯刚度对网壳杆件的稳定承载力影响很大。首先基于组件法的思想推导出了节点在各受力阶段的平面内弯曲刚度以及所对应的临界弯矩值，然后建立数值模型，对铝合金板式节点的网壳平面内抗弯刚度进行模拟，最后在数值分析结果的基础上，拟合得到了节点的弯曲刚度公式，并提出了平面内抗弯刚度的四折线模型。弯曲刚度公式与数值分析结果吻合良好，表明公式具有较高精度。

［关键词］铝合金板式节点； 弯曲刚度； 四折线模型

中图分类号：TU395文献标识码：A文章编号：1002-848X(2018)14-0034-06

Study on in-plane bending stiffness of aluminum alloy gusset joint

Guo Xiaonong1, Zhu Shaojun1, Wang Li1, Ouyang Yuanwen2

(1 Department of Structural Engineering, Tongji University, Shanghai 200092, China; 2 Shanghai Tongzheng Aluminium Structure  Engineering & Technology Co.,  Ltd.,  Shanghai 201103, China)

Abstract:The aluminum alloy gusset (AAG) joint is a typical semi-rigid joint, whose in-plane bending stiffness largely influences the stability of the members of a shell. Firstly, the in-plane bending stiffness and the corresponding bending moment of each loading stage were derived based on the component method. Then numerical models were established to simulate the in-plane bending stiffness of the AAG joint. Finally, the fitting formulae were obtained based on the numerical results, and the four polyline model of in-plane bending stiffness was proposed. The results of the formulae fit well with the numerical results, which indicate that the four polyline model has high accuracy.

Keywords:aluminum alloy gusset joint; bending stiffness; four polyline model

*国家自然科学基金（50908168，51478335）。

作者简介：郭小农，博士，副教授，博士生导师，Email: guo-xiao-nong@tongji.edu.cn。