后张拉预应力鞍形网壳成型过程模拟  

Forming Process Simulation of Hyperbolic Paraboloid Latticed Shell by Post-stress

作　　者：陈东兆[1] 郝际平[2] 于庆展[1] 

机构地区：[1]河南工业大学土木建筑学院,河南郑州450052 [2]西安建筑科技大学研究生学院,陕西西安710055

出　　处：《施工技术》2011年第7期90-93,共4页Construction Technology

基　　金：教育部归国留学人员启动基金项目([1999]No.363);河南省教育厅研究计划项目(2008B110003)

摘　　要：对一后张拉预应力成型鞍形网壳模型的成型形状进行了非线性有限元模拟,建模时使用连接件模拟了上弦杆搭接螺栓连接以及腹杆的鸭嘴端螺栓连接。考虑了几何非线性和材料非线性,将"tube-to-tube"接触算法应用于梁、杆单元组成的结构模型中,与传统建模和分析方法相比,成型预测精度大幅度提高。Nonlinear finite element simulation is carried out in shape prediction of a post-stress shaped hyperbolic paraboloid latticed shell model. Connector elements are used to model the bolt connection of the top joint and the end of web. Based on geometry and material nonlinearity, new FEM refering tube- to-tube contact calculation based on beam and truss elements is employed to shape prediction. The new method is relatively much more accurate than the previous way.

关 键 词：后张拉预应力 网架 成型 有限元法 接触 

分 类 号：TU394[建筑科学—结构工程] TU745.2