钢-砼组合斜拉桥调索计算方法研究

发布时间：2018-06-03 16:38

本文选题：斜拉桥 + 调索方法　；参考：《公路工程》2017年05期

【摘要】：为了减小传统调索方法在钢—砼组合斜拉桥调索过程中钢箱梁由二期恒载引起的变形和应力,在现有调索方法理论基础之上,通过研究提出在钢纤维砼浇筑完成,桥面沥青砼铺装之前进行终调索。详细介绍了最终施调量的计算过程,比较了两种调索方法下的计算所得成桥索力理论值,借助有限元分析软件,分析了运用该方法与传统调索方法进行调索过程中钢箱梁由二期恒载引起的变形和应力,分析结果表明:在钢纤维砼浇筑完成,桥面沥青砼铺装之前进行终调索,整个钢箱梁由二期恒载引起的变形和应力分别减小了由传统调索方法引起变形、应力的34.7%和46.8%,极大地提高了桥面铺装的耐久性。
[Abstract]:In order to reduce the deformation and stress of the steel box girder caused by the second stage dead load in the process of cable adjustment of steel-concrete composite cable-stayed bridge by traditional cable-adjusting method, on the basis of the existing theory of cable adjusting method, it is put forward that the steel fiber concrete construction is completed through the research. Final cable adjustment is carried out before the asphalt concrete pavement on the deck of the bridge. This paper introduces in detail the calculation process of the final adjusting quantity, compares the theoretical values of the bridge cable force calculated under two kinds of cable adjustment methods, and makes use of the finite element analysis software. The deformation and stress of the steel box girder caused by the second phase dead load in the process of cable adjustment by using this method and the traditional cable adjusting method are analyzed. The results show that the final cable adjustment is carried out before the steel fiber concrete is poured and the asphalt concrete pavement of the bridge deck is finished. The deformation and stress of the whole steel box girder caused by the second stage dead load reduce the deformation caused by the traditional cable adjusting method respectively. The stress is 34.7% and 46.8% respectively which greatly improves the durability of the bridge deck pavement.
【作者单位】：兰州交通大学土木工程学院;甘肃省桥梁隧道健康监测与安全评估技术重点实验室;
【基金】：国家自然科学基金项目(51368032)
【分类号】：U448.27

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