施工技术 2011年7月上 90 CONSTRUCTION TECHNOLOGY 第40卷第344期 后张拉预应力鞍形网壳成型过程模拟 陈东兆1，郝际平2，于庆展1 (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) [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. [关键词]后张拉预应力；网架；成型；有限元法；接触 [中图分类号]TU394;TU745.2 [文献标识码]A [文章编号]1002-8498(2011)13-0090-04 Forming Process Simulation of Hyperbolic Paraboloid Latticed Shell by Post-stress Chen Dongzhao' Hao Jiping2 Yu Qingzhan' (1.School of Civil Engineering Architecture He'nan University of Technology Zhengzhou He'nan 450052 China; 2.School of Graduate Student Xi'an University of Architecture Technology Xi'an Shaanxi 710055 China) Abstract: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. Key words:post-stress;space truss;shape formation;FEM;contact 预应力成型的平面拱形桁架大跨结构被称为程并不多见.有人将预应力成型思想引人鞍形网壳 STRARCH结构(STRessed ARCH的缩写)，其结构结构试验，成功张拉形成了马鞍形网壳，并对此后张 设计思想是：机构变结构.其施工工艺很独特：首先拉预应力成型鞍形网壳进行了理论研究.但是，其 钢桁架在地面拼装成门形钢架，预应力索穿越桁架试验网架杆件采用了价格昂贵的无缝管，所建立的 下弦圆钢管，下弦杆截短，此时结构是个几何可变体 计算模型未能考虑钢索与节点之间的滑动接触，网 系.施加预应力，桁架将形成张力，并逐渐往上拱，壳外形...
后张拉预应力鞍形网壳成型过程模拟.pdf
