（哈尔滨工业大学土木工程学院 150090）
【提要】 有计划地对480余例实际尺寸的短程线型单层球面网壳进行了双重非线性全过程分析，求得了极限承载力，系统地考察了初始缺陷和荷载不对称分布等因素对网壳稳定性能的影响，并重点讨论了材料非线性对极限承载力的影响。通过大规模参数分析研究，较全面了解了短程线型单层球面网壳弹塑性稳定性能；在短程线型网壳弹性极限承载力公式基础上，利用塑性折减系数对其进行修正，提出了短程线型单层球面网壳弹塑性极限稳定承载力的实用计算公式。
【关键词】 短程线 稳定 极限承载力 弹塑性
ElasticPlastic Stability of Geodesic Latticed Domes/Cao Zhenggang，Fan Feng，Shen Shizhao(School of Civil Engineering，Haerbin Institute of Technology，Haerbin 150090，China)
Abstract:A comprehensive parametric analysis of stability behaviours of geodesi
c latticed domes with various geometric parameters (span, member crosssection,
 etc.) has been carried out based upon accurate nonlinear completeprocess analy
sis. More than 480 examples of real latticed domes with initial imperfections and
 possible unsymmetrical action of loads are studied systematically, and the plen
tiful results obtained are thoroughly studied. As a result, practical formulas f
or predicting critical loads of real latticed dome structure, which are very sim
ple for application but based on “accurate” theory, are revised.
Keywords:geodesic latticed domes； stability； critical loads； elasticplastic