K8型单层球面网壳的弹塑性稳定  

ELASTO-PLASTIC STABILITY OF K8 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,哈尔滨150090

出　　处：《工业建筑》2007年第4期69-72,共4页Industrial Construction

基　　金：国家自然科学基金项目(50278020)

摘　　要：对1 200多例实际尺寸的K8型单层球面网壳进行双重非线性全过程分析,求得它们的极限承载力,并系统考察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,重点讨论材料非线性对网壳极限承载力的影响。通过这种大规模参数分析研究,较全面揭示K8型单层球面网壳弹塑性稳定性能的规律性,在此基础上对以往仅考虑几何非线性影响的K8型网壳极限承载力实用公式进行修正。A comprehensive parametric analysis of stability behaviours of K8 single-layer latticed domes with various geometric parameters （span, rise-span ratio, member cross-section, etc. ） has been carried out based upon accurate nonlinear complete-process analysis. More than 1200 examples of real latticed domes are analyzed. In addition ,the effect of material nonlinearity, initial imperfections and possible unsymmetrical action of loads are studied systematically. Based upon these results, the critical loads are obtained, the behaviours of elasto-plastic stability are concluded and practical formulas for predicting critical loads of latticed dome structures, which considering only geometrical nonlinear, are revised.

关 键 词：单层球面网壳 稳定 极限承载力 弹塑性 

分 类 号：TU399[建筑科学—结构工程]