大跨度拱式管桁架结构卸荷过程中的节点次应力研究  

RESEARCH ON SECOND STRESS OF LARGE SPAN ARCH PIPE TRUSS STRUCTURE NODE DURING UNLOADING PROCESS

作　　者：王韦 王茂法 徐淑华 王智勇 张凯 

机构地区：[1]特种工程技术安装总队,北京100192

出　　处：《建筑技术》2016年第4期368-370,共3页Architecture Technology

摘　　要：在吊装过程中或吊装完成后,倒三角形断面大跨度拱式管桁架的刚接节点会在自重作用下或与其他桁架连接作用下产生次应力,从而影响桁架节点变形和稳定性。利用ANSYS建模,对节点精细模型在给定的强制位移下的应力、强度及稳定性进行验算。在确保承载力及稳定性的基础上确定了整体吊装方案的可行性与安全性。The second stress of the truss node is generated under the action of gravity or the join with other truss for the arch pipe truss with inverted triangular section, during or after the hoisting process, which leads to the displacement or instability of the truss. By using ANSYS modeling, the stress, strength and stability of the detailed model are analyzed under the enforced displacement of a given plane.The feasibility and safety of the whole lifting scheme were determined after guaranteed of bearing capacity and stability.

关 键 词：大跨度结构 有限元分析 应力计算 强度验算 稳定性验算 

分 类 号：TU378.6[建筑科学—结构工程]