| 大跨度架桥机钢桁架的稳定与极限荷载分析 |
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| 引用本文： | 颜全胜,曾庆元.大跨度架桥机钢桁架的稳定与极限荷载分析[J].华南理工大学学报(自然科学版),2000,28(5):48-53. |
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| 作者姓名： | 颜全胜 曾庆元 |
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| 作者单位： | [1]华南理工大学交通学院 [2]长沙铁道学院土木系 |
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| 摘 要： | 基于有限变形理论，考虑了截面翘曲变形影响，推导了空间闭口薄壁箱型梁的ＵＬ列式增量平衡方程，建立了薄壁箱型梁的非线性稳定计算方法，并编制了相应的程序。将架桥机的两个单个梁换算为等效闭口箱型梁，计算了架桥机钢桁架的侧倾稳定和弹塑性极限荷载。
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| 关 键 词： | 钢桁架 架桥机 极限荷载分析 承载力 侧倾稳定 |
| 修稿时间： | 1999-05-07 |
Lateral Stability and Limit Load of Long-Span Steel Truss for a Girder Erection Machine |
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| YAN Quan_sheng ,ZENG Qing_yuan.Lateral Stability and Limit Load of Long-Span Steel Truss for a Girder Erection Machine[J].Journal of South China University of Technology(Natural Science Edition),2000,28(5):48-53. |
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| Authors: | YAN Quan_sheng ZENG Qing_yuan |
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| Institution: | YAN Quan_sheng 1,ZENG Qing_yuan 2 |
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| Abstract: | In this paper a new formulation for the large_displacement elastic_plastic analysis of spatial steel frame is presented. Based on the virtual work equation of closed thin_walled beam accounted for warping deformation of the section, the proposed formulation is derived in UL formulation. And a program is developed to analyze the closed thin_walled section beam structure. By using the proposed approach, the spatial steel trusses for girder erection machine are converted into two thin_walled beams, and then the limit load and lateral buckling of steel truss is calculated. |
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| Keywords: | steel truss girder erection machine limit load lateral stability closed thin_walled beam |
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