| 基于拱效应比值的门式刚架失稳类型判别 |
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| 引用本文： | 吕辉勇,郭华全.基于拱效应比值的门式刚架失稳类型判别[J].低温建筑技术,2008(1):64-66. |
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| 作者姓名： | 吕辉勇 郭华全 |
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| 作者单位： | 1. 南昌有色冶金设计研究院,江西,南昌,330002
2. 广州顾邦消防工程安装有限公司,广东,广州,510000 |
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| 摘 要： | 为了判断门式刚架结构的失稳类型,利用ANSYS有限元程序,对计算模型进行弹性几何非线性分析,从拱效应比值Ω和水平荷载与竖向荷载比值Ω0入手,作出刚架的荷载位移关系曲线。分析曲线后得出:对于柱脚铰接门式刚架,当Ω0/Ω≤0.1,刚架随着荷载的增加发生对称失稳;对于柱脚刚接门式刚架,当Ω0/Ω≤0.6,则刚架随着荷载的增加发生对称失稳。
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| 关 键 词： | 拱效应比值 水平荷载与竖向荷载比值 |
| 文章编号： | 1001-6864（2008）01-0064-03 |
| 收稿时间： | 2006-09-20 |
| 修稿时间： | 2006年9月20日 |
THE MODE OF IN-PLANE FAILURE OF PORTAL FRAME |
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| LU Hui-Yong,GUO Hua-quan.THE MODE OF IN-PLANE FAILURE OF PORTAL FRAME[J].Low Temperature Architecture Technology,2008(1):64-66. |
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| Authors: | LU Hui-Yong GUO Hua-quan |
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| Affiliation: | LU Hui-yong1,GUO Hua-quan2(Nanchang Engineering & Research Institute of Nonferrous Metals,Nanchang 330002,China) |
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| Abstract: | The ANSYS finite element program is used to perform geometrically nonlinear analysis.The load deflection curves based on the arching effect ratio and the ratio of curve load to horizontal load is obtained.It is in dicated that by analyzing the load-deflection curves,the instability mode is symmetric buckling to hinged connection frame when the ration of Ω0 to Ω is equal to or smaller than 0.1,and when the ration of Ω0 to Ω is equal to or smaller than 0.6,the instability mode is symmetric bucking to rigid connection frame. |
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| Keywords: | arching effect ratio ratio of curve load to horizontal load |
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