Elasto-plastic stability of single-layer reticulated shells with aluminium alloy gusset joints
Elasto-plastic stability of single-layer reticulated shells with aluminium alloy gusset joints
复制标题
铝合金节点单层网壳弹塑性稳定性
DOI：
10.1016/j.tws.2017.02.008
复制
发表时间：
2017
影响因子：
6.4
通讯作者：
Zhu Shaojun
中科院分区：
文献类型：
--
作者：
Xiong Zhe;Guo Xiaonong;Luo Yongfeng;Zhu Shaojun
铝合金节点单层网壳是一种创新的空间结构体系，在建筑工程中得到了广泛的应用。根据理论公式得到的AAG节点的弯曲性能，在有限元分析程序中建立了K6AAG节点壳体的有限元模型。讨论了具有半刚性和刚性节点的K6壳体的屈曲性能。结果表明，AAG节点的半刚性性能对K6壳体的屈曲性能有显著影响。为了加深理解，进行了参数研究，改变跨厚比、高跨比、环、构件截面、节点弯曲性能、节点刚度模型、材料特性、荷载分布、支撑条件和初始几何缺陷。结果表明，这些参数对刚性节点和AAG节点K6壳体弹塑性稳定性的影响有明显不同。最后，根据8000多个网壳模型的有限元计算结果，提出了AAG节点网壳弹塑性屈曲荷载的理论计算公式。
The single-layer reticulated shell with aluminium alloy gusset (AAG) joints is an innovative space structure system, and has been widely used in the building engineering. According to the bending behaviour of AAG joints obtained from the theoretical formulae, the finite element (FE) models of K6 AAG joint shells were established in the ANSYS program. The buckling performance of K6 shells with semi-rigid and rigid joints was discussed. It is indicated that the semi-rigid behaviour of AAG joints had a significant effect on the buckling performance of K6 shells. To develop a further understanding, parametric studies were performed, varying the span-to-thickness ratio, height-to-span ratio, ring, member section, joint bending behaviour, joint stiffness model, material property, load distribution, support condition and initial geometric imperfection. It is found that the effects of these parameters on the elasto-plastic stability of K6 shells with rigid and AAG joints were different obviously. At last, to predict the elasto-plastic buckling load of AAG joint shells, theoretical formulae were proposed on the basis of the FE results of more than 8000 shell models.