单层球面网壳结构弹塑性稳定性能研究  

ELASTO-PLASTIC STABILITY ANALYSIS OF SINGLE LAYER LATTICED DOMES

作　　者：曹正罡[1] 范峰[1] 沈世钊[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《工程力学》2007年第5期17-23,共7页Engineering Mechanics

基　　金：国家自然科学基金重点资助项目(50338010)

摘　　要：有计划地针对六种实际尺寸的常用单层球面网壳结构,利用ANSYS软件及自编的前后处理程序进行了3200余例网壳双重非线性全过程分析。求得网壳的弹塑性极限承载力,系统地考察了初始缺陷和荷载不对称分布,支承条件等因素对单层球面网壳结构弹塑性稳定性能的影响,着重研究考虑材料非线性后网壳极限承载力的变化规律。通过这种大规模参数分析研究,较全面了解单层球面网壳结构的弹塑性稳定性能,为实际工程设计提供了理论依据和设计参考。A comprehensive parametric analysis of elasto-plastic stability behaviors of six kinds of real latticed domes with various geometric parameters were carried out in the present paper. Based upon geometrical and material nonlinear complete-process analysis, more than 3200 examples of latticed domes were analyzed by Finite Element Method software ANSYS and self-developed pre- and post-processing programs for critical elasto-plastic loads. The effects of initial imperfection, possible unsymmetrical distribution of loads and different supporting conditions, especially the effects of material nonlinearity on the critical loads of these kinds of domes were considered. Through the analytical results, the elasto-plastic stability behaviors of single-layer latticed domes are concluded, and guide-lines for the design of this structure is provided.

关 键 词：球面网壳 稳定 极限承载力 弹塑性 ANSYS 

分 类 号：TU311.2[建筑科学—结构工程]