建筑结构学报2017,Vol.38Issue(7):16-24,9.DOI:10.14006/j.jzjgxb.2017.07.003
K6型铝合金板式节点网壳稳定承载力设计方法
Design method for buckling capacity of K6 single-layer reticulated shells with aluminum alloy gusset joints
摘要
Abstract
The K6 single-layer reticulated shell belongs to a common aluminum alloy gusset (AAG) shell system.The AAG joint is a typical semi-rigid joint system,and the influence of the joint stiffness on the global stability of shell cannot be ignored.The finite element (FE) models of K6 single-layer reticulated shells with AAG joints were established using ANSYS,and the semi-rigidity of the AAG joint was introduced by adopting non-linear spring element COMBINE 39.The elasto-plastic global buckling behavior of these FE shells was analyzed considering various parameters.The results reveals that with the rise of the height-to-span ratio,rings,and joint stiffness,and the drop of span-to-thickness ratio,semi-cross live load factor,and initial geometric imperfection,the global elasto-plastic stability of the shell improves,while the introduction of material non-linearity reduces the buckling capacity of the shell.According to the results of more than 8 000 shell models and the statistical regression technology,the theoretical formulae which provids an effective tool for designers to accurately estimate the elasto-plastic buckling load of AAG joint shells are proposed.关键词
铝合金网壳/铝合金板式节点/数值模型/参数分析/弹塑性整体稳定Key words
aluminum alloy shell/AAG joint/numerical model/parametric analysis/e1asto-plastic global stability分类
建筑与水利引用本文复制引用
郭小农,朱劭骏,熊哲,罗永峰..K6型铝合金板式节点网壳稳定承载力设计方法[J].建筑结构学报,2017,38(7):16-24,9.基金项目
国家自然科学基金项目(50908168,51478335). (50908168,51478335)