扁平钢箱梁U型肋加劲板稳定承载力规范计算方法研究
PDF下载 (263)梅红蕾 1,吕忠达 1,2*,赵 卓 2,杨黎明 1.扁平钢箱梁U型肋加劲板稳定承载力规范计算方法研究[J].宁波大学学报(理工版),2018,31(2):68-73.DOI:
MEI Hong-lei 1,L ü Zhong-da 1,2*,ZHAO Zhuo 2,YANG Li-ming 1.Study on standard calculation methods of stability bearing capacity of flat steel box girder with U stiffened panel[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(2):68-73.DOI:
| Title: | Study on standard calculation methods of stability bearing capacity of flat steel box girder with U stiffened panel |
| 作者: | 梅红蕾 1, 吕忠达 1, 2*, 赵 卓 2, 杨黎明 1 |
| Author(s): | MEI Hong-lei 1, L ü Zhong-da 1, 2*, ZHAO Zhuo 2, YANG Li-ming 1 |
| 关键词: | 扁平钢箱梁; 加劲板; U型闭口加劲肋; 局部稳定; 极限承载力; 规范 |
| Keywords: | flat steel box girder; stiffened plate; U rib; local stability; ultimate bearing capacity; standard |
| 分类号: | U448.36 |
| 文献标识码: | A |
| 摘要: | 闭口肋加劲板作为钢箱梁的主要受力构件, 其稳定承载力的计算成为钢箱梁设计的一个关键性问题. 分析比较了钢箱梁受压加劲板极限承载力的常用计算理论以及基于这些理论在国内外最新规范中关于加劲板承载力计算的相关规定, 并运用实例对各规范的相关规定进行验算. 结果表明, 中国规范、欧洲规范计算结果较为接近试验结果, 美国规范次之, 最后是英国规范和日本规范; 并从同一规范的不同桥梁之间的比较得知, 在极限承载力的计算中, 加劲肋相对刚度比对计算结果有着很大的影响; 通过控制加劲肋的刚度比, 可以使用规范较好地得到加劲板的极限承载力, 为钢箱梁的设计提供一些可借鉴的思路. |
| Abstract: | As a main step in computing for the steel box girder, the calculation of its stability and bearing capacity becomes a key issue in the design. In this paper the commonly used calculation theory of compression stiffened plate of steel box girder of ultimate bearing capacity is adopted, based on which the latest practices in the calculation of bearing capacity of stiffened plate, as well as the application of the relevant provisions of the checking code are analyzed. It indicates that the results calculated using both Chinese and European standards respectively are in good consistence to the test results; less consistent is identified with the American Standard, and the least is found with both the British and Japanese standards. On the basis of the comparison between the different bridges with the same specifications, it is found that the relative stiffness ratio of bearing capacity has a great impact on the calculation results. Better controlling the stiffness of the stiffener can be achieved by using the standard of bearing capacity of stiffened plates. The work in this paper may provide some references for future design of steel box girder. |
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| 备注/Memo: | 收稿日期: 2017－09－15. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 浙江省重点科技创新团队项目（2013TD21）. 第一作者: 梅红蕾（1991－）, 女, 河北石家庄人, 在读硕士研究生, 主要研究方向: 桥梁工程. E-mail: 2856166689@qq.com *通信作者: 吕忠达（1963－）, 男, 浙江奉化人, 教授级高工, 主要研究方向: 桥梁工程. E-mail: lzd@189.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
