摘要
采用非线性有限元法建立了索穹顶逆向施工全过程分析方法,通过改变主动索和辅助索的索长来实现索穹顶的整体逆向提升。采用索杆梁模型模拟索穹顶,主动索和辅助索为2节点索单元,被动索为5节点索单元,桅杆为杆单元,中央环梁为梁单元。索长改变通过施加温度荷载实现,整个分析模拟了结构从理想平衡状态到中央环梁放至地面的施工全过程。采用该方法可使所有构件在地面组装完成后整体逆向提升,避免了边张拉、边安装,节省时间,同时避免了模拟分析过程拓扑的不断变化。
A simulation method of integral inverse lifting and stretching process for the cable dome was established based on nonlinear finite element method.The integral inverse lifting process of the cable dome was realized through changing the length of the positive constant force cables and the subsidiary cables.The cable-strut-beam model was used to simulate the cable dome,and the positive constant force cables and the subsidiary cables,the passive cables,the mast,the hub were respectively simulated with the two-node curved element,the five-node isoparametric element,the strut element and the beam element.In the integral inverse lifting process,the integral cable dome moved from the final equilibrium state to the hub reaching ground,and the temperature action can simulate the variations of the cable length.All the structural members of the cable dome were assembled on the floor,and this can prevent structural assemblage in the air and spare construction time.At the same time,the changes of the structural topological relation can be avoided.
出处
《建筑结构》
CSCD
北大核心
2010年第10期74-77,共4页
Building Structure
基金
国家自然科学基金资助项目(50878128)
河北省科技支撑计划项目(092151291)
河北科技大学博士基金(QD200940)
关键词
索穹顶
逆向模拟分析
整体提升
cable dome
inverse simulation analysis
integral lifting
