| 均布荷载作用下单层球面网壳的弹塑性失稳模式研究 |
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| 引用本文： | 曹正罡,陈肖达,范峰.均布荷载作用下单层球面网壳的弹塑性失稳模式研究[J].建筑钢结构进展,2011,13(6):19-23,30. |
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| 作者姓名： | 曹正罡 陈肖达 范峰 |
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| 作者单位： | 1. 哈尔滨工业大学土木工程学院,哈尔滨,150090
2. 北京市建筑设计研究院,北京,100045 |
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| 摘 要： | 为揭示单层球面网壳结构在静力均布荷载作用下的失稳模式与失效机理,预测结构可能发生的破坏模式和承载能力,基于双重非线性全过程分析理论,采用ANSYS软件对典型球面网壳结构开展稳定性参数分析,系统考察结构的荷载-位移全过程曲线、塑性发展分布、屈曲模态等特征响应。并以典型算例为代表,从宏观和微观两个方面诠释了单层球面网壳结构可能发生的3种失稳模式:弹性失稳、弹塑性提前失稳、弹塑性失稳。指出弹塑性提前失稳是由于结构强度破坏诱发的一类承载力偏低的失稳模式,为提高结构安全性,在网壳稳定性设计阶段中应避免出现此类失稳模式。
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| 关 键 词： | 单层球面网壳 弹塑性 失效机理 稳定 失稳模式 |
Elasto-Plastic Instability Mode of Single-Layer Latticed Domes under Uniform Load |
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| CAO Zheng-gang,CHEN Xiao-da,FAN Feng.Elasto-Plastic Instability Mode of Single-Layer Latticed Domes under Uniform Load[J].Progress in Steel Building Structures,2011,13(6):19-23,30. |
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| Authors: | CAO Zheng-gang CHEN Xiao-da FAN Feng |
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| Affiliation: | CAO Zheng-gang1,CHEN Xiao-da1,FAN Feng1(1.School of Civil Engineeving,Harbin Institute of Technology,Harbin 150090,China,2.Beijing Institute of Architectural Design,Beijing 100045,China) |
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| Abstract: | In order to reveal the instability mode and failure mechanism of single-layer latticed dome under static uniform load,and to evaluate the possible failure modes and load bearing capacity of the structures,based on the double nonlinear complete load-deflection analysis theory,the stability parameter analysis of typical latticed domes are carried out by ANSYS software.The characteristic response of the structure such as the complete load-deflection curve,the development of plasticity and buckling modes are sy... |
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| Keywords: | single-layer latticed dome elasto-plasticity failure mechanism stability instability mode |
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