湖南大学学报（自然科学版）2016，Vol.43Issue(11)：33-38,6.
蜂窝网格型球面网壳的非线性稳定性研究∗
Nonlinear Stability Analysis of Single-layer Honeycomb Spherical Latticed Shells
摘要
Abstract
The finite element software ANSYS was used to investigate the nonlinear stability of single-layer spherical latticed shells with hexagonal connection form.Firstly,a reasonable grid layout was deter-mined by analyzing and comparing the stability of two types of honeycomb spherical latticed shells.A large scale parametric analysis was then carried out,including the influences of the span,raise-span ratios,grid size,initial geometric imperfection,asymmetric load distribution,and material nonlinearity on the stability behavior of honeycomb spherical latticed shells.The results show that the grid of typeⅠexhibits better o-verall stability capacity for two kinds of grid configurations of single-layer honeycomb spherical latticed shells.It is also suggested that the span should not exceed 40 m.The overall stability of the net shell is better and material utilization is higher,when the rise to span ratio is close to 0.25 and the bar length is a-bout 2 meters.Meanwhile,the material nonlinearity has a great effect on the stability of the bearing capac-ity for single-layer honeycomb spherical latticed shells,and the bearing capacity of latticed shells is de-creased by 50%.However,the critical load of latticed shells is reduced by 52% when the initial defectsreach 1/150 of the span.Moreover,it is found that the reticulated shells are not sensitive to the asymmet-ric loads.关键词
单层蜂窝型球面网壳/稳定性/极限承载力/非线性分析Key words
single-layer honeycomb spherical latticed shells/stability property/critical load/nonlinear analysis分类
建筑与水利引用本文复制引用
贺拥军,彭正群..蜂窝网格型球面网壳的非线性稳定性研究∗[J].湖南大学学报（自然科学版）,2016,43(11):33-38,6.基金项目
国家重点研发计划资助项目(2016YFC0701200,2016YFC0701201) （2016YFC0701200,2016YFC0701201）
湖南省高校科技创新团队滚动计划资助项目(湘财教指(2015)616号) （湘财教指(2015）
