| 钢管混凝土拱桥管内混凝土灌注阶段扣索力计算 |
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| 引用本文： | 龚成立,刘静.钢管混凝土拱桥管内混凝土灌注阶段扣索力计算[J].重庆交通大学学报(自然科学版),2009,28(5):830-832,851. |
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| 作者姓名： | 龚成立 刘静 |
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| 作者单位： | 1. 重庆市巫山县,公路技术管理所,重庆,404700
2. 重庆市巫山县交通勘察设计室,重庆,404700 |
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| 摘 要： | 钢管混凝土拱桥管内混凝土灌注时,会在某些阶段产生超过混凝土容许值的过程拉应力,需要通过张拉扣索力来调整。提出利用拱脚管内混凝土截面应力影响线来寻找最佳扣索点位置,分别计算管内混凝土灌注阶段和单位扣索力下控制截面的应力。根据混凝土施工过程中的容许应力值,计算出混凝土灌注时所需的扣索张拉值。结合在建中的湖北恩施小河特大桥,介绍详细计算方法
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| 关 键 词： | 钢管混凝土拱桥 混凝土灌注 应力影响线 扣索索力 过程拉应力 |
Calculation of Cable Forces of CFST Arch Bridge during Core Concrete Casting |
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| GONG Cheng-li,LIU Jing.Calculation of Cable Forces of CFST Arch Bridge during Core Concrete Casting[J].Journal of Chongqing Jiaotong University,2009,28(5):830-832,851. |
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| Authors: | GONG Cheng-li LIU Jing |
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| Institution: | GONG Cheng-li1,LIU Jing2(1.Highway Technology & Management Station of Wushan County,Chongqing Wushan 404700,China,2.Communication Survey & Design Station of Wushan County,China) |
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| Abstract: | During the concrete casting process of concrete filled steel tubular(CFST) arch bridge,the phenomenon that the process tension stress could exceed allowable stress will occur at some stages,and the process tension stress must be adjusted by cable forces.To find the best cable position,a method making use of the sectional stress influence line of core concrete at arch footing is put forward.The stresses of control section about core concrete casting and unit cable force are calculated respectively.According ... |
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| Keywords: | concrete filled steel tubular(CFST) arch bridge concrete casting stress influence line cable force process tension stress |
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