| 悬浇箱梁节段张拉后腹板裂纹成因分析与防治 |
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| 引用本文： | 李正,韩大章,戴捷.悬浇箱梁节段张拉后腹板裂纹成因分析与防治[J].现代交通技术,2009,6(3):37-40. |
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| 作者姓名： | 李正 韩大章 戴捷 |
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| 作者单位： | 江苏省交通规划设计院有限公司,江苏南京,210005 |
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| 摘 要： | 对某悬浇预应力连续箱梁纵向预应力下弯钢束张拉后,腹板沿着波纹管出现裂纹的现象进行了分析,并分别用拉-压杆模型、三维实体有限元模型和钢筋混凝土非线性有限元模型进行了计算,总结了腹板开裂的主要原因,提出了裂纹控制措施的建议,可为预应力连续箱梁的合理设计和同类问题的处理提供参考。
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| 关 键 词： | 预应力箱梁 腹板裂纹 拉-压杆模型 有限元 钢筋混凝土 防治措施 |
Analyse and Control of Cracks of Prestressed Concrete Box Girder Web |
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| Li Zheng,Han Dazhang,Dai Jie.Analyse and Control of Cracks of Prestressed Concrete Box Girder Web[J].Modern Transportation Technology,2009,6(3):37-40. |
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| Authors: | Li Zheng Han Dazhang Dai Jie |
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| Institution: | Jiangsu Provincial Communication Planning & Design Institute Co.;Ltd;Nanjing 210005;China |
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| Abstract: | According to web cracks along the bellows of a prestressed continuous box girder bridge in cantilever construction,this paper analyses the main causes of cracks by strut-and-tie mode,3-D finite element model and nonlinear finite element model of reinforced concrete. And the reasonable proposal is given based on the the mechanical mechanism. The suggestions for the prevention of web cracks and the design of prestressing tendon are also given. The results could be taken as reference for similar problem. |
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| Keywords: | prestressed concrete box girder web crack strut-and-tie mode finite element reinforced concrete prevention measures |
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