大型局部双层网壳的体系及稳定性研究  

Structural formation and stability performance investigations of large partial double layer reticulated shell structures

作　　者：陈务军[1] 董石麟[1] 付功义[1] 

机构地区：[1]上海交通大学空间结构研究中心,上海200030

出　　处：《建筑结构学报》2005年第1期1-10,共10页Journal of Building Structures

基　　金：国家自然科学基金资助项目(59895410)。

摘　　要：本文总结了近四年课题组关于大型局部双层网壳的研究成果。首先介绍了局部双层网壳体系及其成形方法,一般可基于基本的双层、单层网壳演变而来,如球面(大矢高、小矢高)、柱面网壳,叉筒以及其它组合形式。几何非线性混合有限元法是分析结构稳定特性的有效方法,弧长法、广义增量法与Newton-Raphson方法结合可实现屈曲后过程跟踪,可以采用通用有限元软件或开发程序。然后主要用自己编的程序进行了大量典型局部双层网壳的稳定特性分析及参数影响分析,包括矢高、跨度、矢跨比、厚度、厚跨比、单层区域大小、支承边界刚度等。最后介绍了几个大型局部双层网壳工程设计应用,并进行了稳定特性分析,保证强度与稳定的合理性。Research works were summarized herein for the partial double layer reticulated shell structures (PDLRSS) over the past four years. At first, structural style and form creation were presented for PDLRSS, which generally were rooted in the basic forms of single and double layer reticulated structures, such as sphere of high and shallow rise, cylindrical vault, cross-vault, and other compound forms. Compound geometrically nonlinear finite element was proved effective for stability analysis of PDLRSS, which could follow the path of post-buckling phase employing arc-length and generalized incremental method jointed with Newton-Raphson iterative technique. General FEM software could be used or developed in line with the procedures aforementioned. Furthermore a great number of structural buckling stability performances and parametric evaluations were carried out with the program developed by authors for a series of typical PDLRSS, including rise, span, rise-span ratio, depth, depth-span ratio, single layer range, boundary stiffness, etc. Finally the design and applications of several large PDLRSS projects were introduced, stability analysis were performed to satisfy overall reasonable strength level and buckling characteristics.

关 键 词：局部双层网壳 矢高 单层网壳 弧长法 柱面网壳 几何非线性 结构稳定 体系 课题组 开发程序 

分 类 号：TU332[建筑科学—结构工程] TU356