摘要
以双曲抛物面索网结构为研究对象,考虑索网结构在变形、失稳破坏期间的几何及材料非线性特性,采用钢绞线本构关系及ANSYS中索单元,对双曲抛物面索网在固定边界条件下承受静力荷载作用下的极限承载力进行分析,研究了索网结构中索的初索力及索网结构几何大小对索网结构承载能力的影响。结果表明,索网结构随着预应力比的增加,索网结构的承载能力逐渐下降,在半跨荷载作用下,索的极限承载能力相对于全跨荷载工况略有提高;随着预应力增大,两种荷载布置引起的极限荷载差别减小。在工程上,常用几何大小范围内几何尺寸对极限承载能力的影响不大。本文结果可供索网结构设计及施工时参考。
This paper studied cable structures with hyperbolic paraboloid shape. Considering the nonlinear characteristics of cable structures with hyperbolic paraboloid shape in both material and geometry in deformation and instability, the ultimate bearing capacity of cable-net structure was analyzed under static loads and fixed contour supports, based on the constitutive relations of material of strand cable and the finite element method of cable element. Relevant parameters which influence the ultimate bearing capacity of cable-net structure have been analyzed. The results demonstrate that ultimate beating capacity decrease with the prestressing force increasing. The ultimate bearing capacity of cable net structures under entirely distributed loads than that of half-span distributed loads. However, the differences between the above two cases decreases with the prestressing force ratio enhancing. Within the scope of engineering physical dimensions, the influence of the physical dimensions of cable net structures is little. The results have valuable reference for engineering design and constructions.
出处
《四川建筑科学研究》
北大核心
2009年第2期1-4,共4页
Sichuan Building Science
基金
杰出青年科学基金资助项目(50225825)
关键词
双曲索网
承载能力极限
参数分析
有限元模拟
hyperbolic paraboloid cable networks
ultimate bearing capacity
parametric analysis
finite element modeling
