| 温度梯度作用对开裂后预应力混凝土箱梁桥性能影响 |
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| 引用本文： | 彭仙淼.温度梯度作用对开裂后预应力混凝土箱梁桥性能影响[J].广东公路交通,2017(2). |
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| 作者姓名： | 彭仙淼 |
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| 作者单位： | 广东省南粤交通投资建设有限公司,广州,510101 |
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| 摘 要： | 温度梯度作用是引发预应力混凝土箱梁桥开裂非常重要的一个原因。全国许多学者都积极参与此领域的研究,得出许多有价值的结论,但普遍的分析模型中并未考虑裂缝引起部分部位刚度降低的影响,而很多裂缝在施工过程就已经出现。研究温度梯度作用下箱梁桥不带裂缝工作状态与带裂缝工作状态的内力变化,分析裂缝对结构刚度的影响及其引起的内力变化。
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| 关 键 词： | 温度梯度应力 开裂 混凝土箱梁桥 |
Influence of Temperature Gradient Effect on the Performance of Cracked Prestressed Concrete Box Girder Bridge |
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| PENG Xianmiao.Influence of Temperature Gradient Effect on the Performance of Cracked Prestressed Concrete Box Girder Bridge[J].Guangdong Highway Communications,2017(2). |
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| Authors: | PENG Xianmiao |
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| Abstract: | Temperature gradient is one of the most important reasons for cracking of prestressed concrete box girder bridges.Many scholars in the country have devoted much attention to this field and have drawn many valuable conclusions.However,the general analysis model does not consider the influence of the cracks caused by the reduction of the rigidity of parts,and many cracks have appeared in the construction process.In this paper,the influence of crack on the structural rigidity and the internal forces caused by the crack have been analyzed under the working condition of the temperature gradient with and without crack. |
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| Keywords: | temperature gradient stress cracking concrete box girder bridge |
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