东南大学学报（英文版）2016，Vol.32Issue(1)：51-57,7.DOI:10.3969/j.issn.1003-7985.2016.01.010
低矢跨比类椭圆形弦支穹顶结构稳定性能分析
Stability analysis of ellipse-like suspen-dome structures with low rise-span ratio
摘要
Abstract
To investigate the effects of initial geometric imperfection and material nonlinearity on the stability analysis of the suspen-dome the steel roof of Jiangsu Culture Sports Center Gymnasium was utilized as a numerical model and modal analyses were performed. Then linear buckling analysis geometric nonlinear stability analysis geometric nonlinear stability analysis with initial imperfection and double nonlinear analysis considering material nonlinearity and geometric nonlinearity were discussed in detail to compare the stability performance of the ellipse-like suspen-dome and the single-layer reticulated shell.The results show that the cable-strut system increases the integrity of the suspen-dome and moderates the sensibility of the single-layer reticulated shell to initial geometric imperfection. However it has little influence on integral rigidity fundamental vibration frequencies linear ultimate live loads and geometric nonlinear ultimate live loads without initial imperfection.When considering the material nonlinearity and initial imperfection a significant reduction occurs in the ultimate stability capacities of these two structures.In this case the suspen-dome with a low rise-span ratio is sensitive to the initial imperfection and material nonlinearity.In addition the distribution pattern of live loads significantly influences the instability modes of the structure and the uniform live load with full span is not always the most dangerous case.关键词
弦支穹顶/单层网壳/类椭圆形/稳定性分析/初始几何缺陷/几何非线性/材料非线性Key words
suspen-dome/single-layer/reticulated/shell ellipse-like/stability analysis/initial geometric imperfection geometric nonlinearity/material nonlinearity分类
建筑与水利引用本文复制引用
丁明珉,罗斌,陈项南,郭正兴,管东芝..低矢跨比类椭圆形弦支穹顶结构稳定性能分析[J].东南大学学报（英文版）,2016,32(1):51-57,7.基金项目
The National Key Technology R＆D Program of Chi－na No．2012BAJ03B06 the National Natural Science Foundation of China No．51308105 the Priority Academic Program Development of Jiangsu Higher Education Institutions PAPD the Fundamental Re－search Funds for the Southeast University No．KYLX＿0152 SJLX＿0084 KYLX＿0149． （）
