Analysis of Curved Box Girder's Force Condition under Prestressed Radical Force

Journal of Chongqing Jiaotong University(Natural Science) ›› 2008, Vol. 27 ›› Issue (6): 1009-1013.

Analysis of Curved Box Girder's Force Condition under Prestressed Radical Force

XIANG Zhong-fu¹, BIAN Ming-zhi¹, LIANG Tian-tian¹, ZHU Ci-xiang²

1. School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China;
2. Wuhan Second Navigational Road & Bridge Special Engineering Co. Ltd, Hubei Wuhan 430071, China

Received:2008-06-26 Revised:2008-08-06 Online:2008-12-20 Published:2016-11-07

曲梁在预应力径向分力作用下的受力分析

向中富¹, 卞明智¹, 梁甜甜¹, 朱慈祥²

1. 重庆交通大学土木建筑学院, 重庆 400074;
2. 武汉二航路桥特种工程有限责任公司, 湖北武汉 430071

作者简介:向中富(1960-),男,四川苍溪人,教授,主要研究方向为桥梁设计理论与施工技术。E-mail:xzf6058@cquc.edu.cn。

Abstract

Abstract: Through theoretical analysis and model pilot study,the different mechanical models of the curved beam under the radical force are compared.The distribution of the radical force in the curved box girder and the influence of anti-collapse of steel area and the prestressed wire's protective layer thickness are analyzed.Besides,the radical force's impact on the crack and the responsive measures are also discussed.The fitting formula of radical force and anti-collapse of steel area is proposed,which can serve as a reference for the design and construction of the curved box girder.

Key words: curved box girder, stress distribution, crack, anti-collapse steel, protective layer thickness

摘要： 通过理论分析与模型试验研究,比较了曲梁在径向力作用下的不同受力模型;分析了径向拉应力在曲线箱梁腹板中的分布以及防崩钢筋面积和预应力筋保护层厚度的影响;讨论了径向拉应力对裂缝的影响及预防措施,最后提出了防崩钢筋面积与径向拉应力的拟合关系式,可供曲线箱梁的设计及施工参考。

关键词: 曲线箱梁, 应力分布, 崩裂, 防崩钢筋, 保护层厚度

CLC Number:

U441⁺.5

XIANG Zhong-fu, BIAN Ming-zhi, LIANG Tian-tian, ZHU Ci-xiang. Analysis of Curved Box Girder's Force Condition under Prestressed Radical Force[J]. Journal of Chongqing Jiaotong University(Natural Science), 2008, 27(6): 1009-1013.

向中富, 卞明智, 梁甜甜, 朱慈祥. 曲梁在预应力径向分力作用下的受力分析[J]. 重庆交通大学学报（自然科学版）, 2008, 27(6): 1009-1013.

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