| 某桥中跨合拢段底板纵向裂缝成因分析 |
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| 引用本文： | 赵振乾.某桥中跨合拢段底板纵向裂缝成因分析[J].工程建设与设计,2010(2):112-115. |
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| 作者姓名： | 赵振乾 |
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| 作者单位： | 河北邯郸市交通局,河北邯郸,056002 |
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| 摘 要： | 针对某桥合拢段底板纵向裂缝,采用空间有限元分析程序分析张拉中跨合拢束后的空间效应。计算结果表明,底板纵向裂缝产生的主要原因是底板纵向预应力过大,由于泊松比效应,导致混凝土横向拉应力超过混凝土抗拉强度设计值。同时分析了产生该现象的一些主要因素。
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| 关 键 词： | 箱梁 底板 纵向裂缝 有限元 |
Analysis of Longitudinal Cracks of Bian Dan He Bridge's Middle Span Closure Section Bottom Slab |
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| ZHAO Zhen-kun.Analysis of Longitudinal Cracks of Bian Dan He Bridge's Middle Span Closure Section Bottom Slab[J].Construction & Design for Project,2010(2):112-115. |
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| Authors: | ZHAO Zhen-kun |
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| Affiliation: | He bei Handan Jiaotong Bureau;Handan 056002;China |
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| Abstract: | Aiming at the longitudinal cracks of BianDanHe Bridge's bottom slab, the paper makes a finite element simulation of the structure. The results suggest that the longitudinal cracks of the bottom slab attribute to very great longitudinal prestress of the bottom slab. Because of effects of poisson's ratio, the transverse tensile stress of concrete exceed the permission number,and the paper analyses the major causation of the phenomenon. |
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| Keywords: | box girder bottom slab longitudinal crack finite element |
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