基于应变能法的大跨度钢桁架四吊点选取分析.doc

1 基于应变能法的大跨度钢桁架四吊点选取分析姚刚谢巍居虎(重庆大学土木工程学院,重庆 400045 ) 【摘要】:本文对应变能法运用在选择吊点中的进行了可行性分析,利用应变能方法应用于结构吊装,根据吊点约束数量,在所有节点变量空间里面进行组合计算,通过计算得到的内力结果计算桁架的应变能,对不同的应变能结果进行排序,得到最小的应变能,这时结构单元的杆件内力和节点位移都处于一个较合理的状态,吊点约束组合就可以认为是最佳吊点组合。结合重庆某厂房工程,运用 ANSYS 软件的进行应变能数值模拟分析,并对得出的吊点使用 MIDAS 软件分析验证了三种施工工况条件下大跨度钢桁架分段吊装施工的应力应变情况,保证了吊点选取的安全性和科学性。【关键词】:应变能法;钢桁架;四吊点;工况分析 Selection a nalysis of four hoisting point s in the great span steel truss based on the strain energy principle YAO Gang, XIE Wei , JU Hu ( Faculty of Civil Engineering, Chongqing University, Chongqing 400045, China) Abstract: This article introduced the feasibility analysis of the strain energy method which is used in the selection of hoisting points, the method making use of the strain energy applies to structure hoisting, restrain quantity according to hoisting point , bination being in progress in all node variables space inside secretly schemes against , will calculate is under the smallest strain bination four to hang bination, will analyze and obtains the structural unit the member endogenic force and the nodal displacement is at the reasonable condition, therefore should hang the bination to be possible to think that hangs bination best. U nifies a Chongqing workshop project, carries on the strain energy numerical simulation analysis using the ANSYS software, and to obtained hoisting point to use the MIDAS software analysis to confirm s