深圳大运交通枢纽变截面柱计算长度系数研究

高修建; 李文杰; 井司南; 刘文锐; 闫韬升; 陈志华

doi:10.3724/j.gyjzG24080108

深圳大运交通枢纽变截面柱计算长度系数研究

doi: 10.3724/j.gyjzG24080108

1. 中国铁路设计集团有限公司, 天津 300308;
2. 天津大学建筑工程学院, 天津 300072

基金项目:

国家重点研发计划项目(2019YFD1101000)。

详细信息

作者简介:
高修建,正高级工程师,主要从事城市轨道交通结构工程的设计研究。

通讯作者:
陈志华,zhchen@tju.edu.cn。

计量
- 文章访问数: 74
- HTML全文浏览量: 21
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2024-08-01
- 网络出版日期: 2025-03-28

Research on Calculated Length Coefficients of Columns with Variable Sections in Shenzhen Dayun Transportation Hub

1. China Railway Design Corporation, Tianjin 300308, China;
2. School of Civil Engineering, Tianjin University, Tianjin 300072, China

摘要

摘要: 为进一步研究变截面柱的计算长度系数,通过数值模拟验证了已有变截面柱计算长度系数计算方法,以深圳大运城市交通枢纽为工程背景,对变截面受压杆件开展了整体结构以及单根构件的屈曲数值模拟,计算了本工程中3种压杆的计算长度系数,得到了其约束条件以供实际工程参考。在此基础上进行了杆件在一端固接、一端铰接,一端固接、一端自由两种情况下的参数分析,得到了这两种边界条件下杆件计算长度系数的经验计算公式。结果表明,随着上下端截面惯性矩比值的减小,变截面压杆的计算长度系数相较于等截面压杆有所减小,表明构件的屈曲受到了约束,材料性能得到了更加充分的发挥。
- 计算长度系数 /
- 变截面 /
- 柱 /
- 数值模拟 /
- 计算公式
Abstract: To conduct further research on the calculated length coefficients of columns with variable sections, the existing calculation methods of the calculation length factors of columns with variable sections were verified through numerical simulations. Taking the Shenzhen Dayun Transportation Hub as the engineering background, numerical simulations of buckling of variable-section compression members in the overall structure and individual members were conducted. The calculation length coefficients of three compression members in the project were calculated, and the constraints conditions were obtained for reference in actual engineering. Based on this, the parameter analysis was conducted under the boundary conditions of one end fixed and the other end hinged, and one end fixed and the other end free, and the empirical calculation formula for the calculation length coefficient of the members under these two boundary conditions was obtained. The results showed that as the ratio of the inertia moment of the upper and lower ends decreased, the calculation length coefficients of the variable-section compression member was smaller than that of the equal-section compression member, indicating that the buckling of the member was constrained, and the material properties was fully utilized.
- calculated length factor /
- variable section /
- column /
- numerical simulation /
- calculation formula

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参考文献(10)

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