基于非线性有限元的索穹顶施工模拟分析

索穹顶结构的成形和施工模拟分析是该体系的基础问题。由于包含着刚体位移的分析使得跟踪难度相当大。本文采用了基于非线性有限元的施工过程分析 ,适应性强、分析精度高 ,避免了刚体位移假定。从而使得索穹顶体系的成形过程、受荷状态的全过程分析方法获得了统一。通过与试验模型对比分析表明本文方法操作简单且分析精度较高 ,分析的结果能够很好地指导施工

Simulation of erection procedures of cable domes based on nonlinear FEM

Simulation of the erection procedures of the cable domes is one of the key engineering problems. The rigid body displacement, which should be allowed, makes the analysis more complex. In this paper, anovel method, based on nonlinear FEM, is applied and the rigid body displacement analysis is avoided. Therefore the analysis for whole procedures of the cable domes is unified. The initial displacement assumption method is also put forward to reduce the number of iterations. Furthermore, the method can be extended for various cable\|strut tensile structures and the result given can direct the construction on site.