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[1]赵启林,丁勇,翟可为.大跨度预应力混凝土箱梁桥腹板抗裂敏感性与配索优化分析[J].建筑科学与工程学报,2011,28(03):29-33.
　ZHAO Qi-lin,DING Yong,ZHAI Ke-wei.Analysis of Web Anti-crack Sensitivity and Tendon-collocating Optimization for Long-span Prestressed Concrete Box-girder Bridge[J].Journal of Architecture and Civil Engineering,2011,28(03):29-33.
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大跨度预应力混凝土箱梁桥腹板抗裂敏感性与配索优化分析(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
28卷
期数:
2011年03期
页码:
29-33
栏目:
出版日期:
2011-09-20

文章信息/Info

Title:
Analysis of Web Anti-crack Sensitivity and Tendon-collocating Optimization for Long-span Prestressed Concrete Box-girder Bridge
作者:
赵启林,丁勇,翟可为
中国人民解放军理工大学 工程兵工程学院,江苏 南京 210007
Author(s):
ZHAO Qi-lin, DING Yong, ZHAI Ke-wei
School of Engineering Corps, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China
关键词:
斜裂缝;  大跨度;  预应力混凝土箱梁桥;  腹板;  敏感性
Keywords:
inclined crack;  long-span;  prestressed concrete box-girder bridge;  web;  sensitivity
分类号:
U448.213
DOI:
-
文献标志码:
A
摘要:
针对各国大量悬浇预应力混凝土箱梁桥出现腹板斜裂缝,且腹板单纯配置竖向索的桥梁比腹板设置下弯索的开裂更 为严重的现象,采用敏感性分析方法对单纯采用竖向索和单纯采用下弯索的腹板抗裂性进行了对比分析; 针对腹板不仅 存在剪应力而且存在竖向拉应力的客观事实,证明了下弯索无法克服腹板竖向拉应力导致的主拉应力,指出腹板进行竖向 索与下弯索混合配置的必要性,且推导出了腹板竖向索与下弯索的合理配置比例。结果表明:在其他因素相同的情况下, 采用竖向索抗剪的腹板抗裂可靠性明显低于采用下弯索的腹板抗裂可靠性。
Abstract:
The inclined cracks in webs of prestressed concrete box-girder bridge with suspended construction took place frequently, and it was more common in these with pure vertical tendons than those with bending ones. Comparison of web anti-crack property was conducted between them with the method of sensitivity analysis. Bending tendons were proved not to overcome the principal stress due to vertical tensile stress with the fact that vertical tensile stress exists as well as shear in webs. The need of mixed configuration with bending tendons and vertical ones was highlighted, and suitable proportion between vertical and bending tendons was given. The results indicate the webs with bending tendons are more reliable than those with pure vertical ones obviously even under the same condition.

参考文献/References:

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[9]吉 林,赵启林,丁 勇.预应力箱梁桥腹板主应力计算探讨[J].公路交通科技,2010,27(6):85-90. JI Lin,ZHAO Qi-lin,DING Yong.Discuss on Calculation of Principal Stress About Webs of Pre-stressed Box- girder Bridge[J].Journal of Highway and Transportation Research and Development,2010,27(6):85-90.

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备注/Memo

备注/Memo:
收稿日期:2011-05-02
基金项目:国家高技术研究发展计划(“八六三”计划)项目(2007AA11Z120)
作者简介:赵启林(1973-),男,江苏淮安人,副教授,工学博士,E-mail:zhaohsq1919@163.com。
更新日期/Last Update: 2011-09-20