考虑砌体本构关系的石拱桥极限承载力研究

doi:10.3969/j.issn.1674-0696.2015.05.03

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摘要: 考虑砌体材料受压破坏本构关系，通过分析截面偏心受压的弯矩轴力关系，得出了拱桥破坏过程中截面偏心距的限制条件；通过非线性优化的机构分析法得出了石拱桥的极限承载力，并在此基础上讨论了砌体抗压强度对石拱桥的极限承载力的影响。结果表明：砌体材料的抗压强度较低时，石拱桥承载能力对材料强度较为敏感，且随着石拱桥跨径的增大，敏感性进一步增大。

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	郑丹
	黄才政

关键词 ：桥梁工程, 石拱桥, 砌体, 偏心受压, 非线性优化

Abstract：The relationship of moment and axial load of eccentrically loaded masonry section were analyzed, considering constitution of masonry material under compression till failure. The limit strength of masonry arch was achieved by nonlinear optimization mechanism analysis. The influence of masonry strength on limit strength of masonry arch was also discussed. The results show that when the compressive strength of masonry materials is low, bridge bearing capacity on the material strength is relatively sensitive, and with the bridge span increasing, the sensitivity is further increased.

Key words ： bridge engineering, masonry arch bridge, masonry, eccentrically compress, nonlinear optimization

收稿日期: 2014-09-28

PACS:	U441+.5
	TU365

基金资助:交通运输部应用基础项目(2012319814210)；重庆市科委项目（cstc2012jjA1026）

作者简介: 郑丹（1979—），男，重庆人，教授，博士，主要从事混凝土材料性能方面的研究。E-mail：zhengdan@cquc.edu.cn。

引用本文:

郑丹，黄才政. 考虑砌体本构关系的石拱桥极限承载力研究[J]. 重庆交通大学学报（自然科学版）, 2015, 34(5): 14-17.
Zheng Dan, Huang Caizheng. Limit Strength of Masonry Arch Bridge Considering the Constitution of Masonry. Journal of Chongqing Jiaotong University(Natural Science), 2015, 34(5): 14-17.

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http://xbzk.cqjtu.edu.cn/CN/10.3969/j.issn.1674-0696.2015.05.03 或 http://xbzk.cqjtu.edu.cn/CN/Y2015/V34/I5/14

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