矩形平面单层球面网壳的静力稳定性

发布时间：2018-02-11 06:31

  本文关键词： 矩形底面 单层球面网壳 静力稳定性 等代刚度 初始几何缺陷　出处：《辽宁工程技术大学学报(自然科学版)》2016年12期 　论文类型：期刊论文

【摘要】：针对底面为矩形的球面网壳结构,分析了常见三种网格形式的非线性稳定性能,选出其中性能较合理的一种网格形式,通过大规模参数化分析,较为系统地研究了矩形平面单层三向球面网壳结构的稳定性能,并给出了其极限承载力拟合公式.研究结果表明:常见网格形式中三向网格矩形底面球面网壳的稳定性能最优;极限载荷与结构等代刚度呈线性关系;初始几何缺陷对网壳极限载荷影响非常明显,当初始缺陷值取L/300时,极限载荷降低率在53.5%~65.8%之间;结构对载荷不对称分布并不敏感;立体桁架能够显著提高结构的极限承载能力.
[Abstract]:According to the structure of spherical reticulated shell with rectangular bottom surface , the paper analyzes the nonlinear stability of three kinds of grid forms , and selects one kind of grid form which is reasonable in performance . By means of large - scale parametric analysis , the stability performance of single - layer three - way spherical reticulated shell of rectangular plane is studied systematically . The results show that the limit load and the structure are linear ; and when the initial defect value is L / 300 , the limit load reduction rate is between 53.5 % and 65.8 % , and the structure has no sensitivity to the load asymmetry distribution . The three - dimensional truss can obviously improve the ultimate bearing capacity of the structure .

【作者单位】： 湖南大学土木工程学院;
【基金】：国家自然科学基金项目(51178176) 教育部博士点基金项目(20120161110019)
【分类号】：TU399
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本文编号：1502414