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。
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.
出处
《重庆交通大学学报（自然科学版）》
CAS
2008年第6期1009-1013,共5页
Journal of Chongqing Jiaotong University(Natural Science)
关键词
曲线箱梁
应力分布
崩裂
防崩钢筋
保护层厚度
curved box girder
stress distribution
crack
anti-collapse steel
protective layer thickness
