| 混凝土箱梁桥底板线型对纵向裂缝的影响分析 |
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| 引用本文： | 齐成龙.混凝土箱梁桥底板线型对纵向裂缝的影响分析[J].现代交通技术,2012,9(3):26-29. |
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| 作者姓名： | 齐成龙 |
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| 作者单位： | 铁道第三勘察设计院集团有限公司,天津,300142 |
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| 摘 要： | 对混凝土箱梁桥在合龙束作用下可能产生的底板纵向开裂现象进行了分析,从理论层面阐述了这种现象的力学机理。同时以1座预应力混凝土连续梁桥和1座预应力混凝土连续刚构桥为例,通过改变其底板线形,分析不同底板线形的底板受力情况,提出了避免跨中箱梁底板纵向开裂的建议,为类似桥梁设计提供参考。
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| 关 键 词： | 桥梁工程 底板线形 纵向开裂 预应力 |
Effect Analysis of Bottom Slab Line Type in Concrete Box Girder on Longitudinal Cracking |
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| Qi Chenglong.Effect Analysis of Bottom Slab Line Type in Concrete Box Girder on Longitudinal Cracking[J].Modern Transportation Technology,2012,9(3):26-29. |
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| Authors: | Qi Chenglong |
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| Institution: | Qi Chenglong (The Third Railway Design Institute Group Corporation,Tianjin 300142, China) |
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| Abstract: | This paper analyzes the effect of longitudinal cracking on the bottom slab induced by closure tendon in concrete box girder. Firstly, the mechanism of this phenomenon on the basis of theory is expounded, then stress state of bottom slab with different line types is studyed based on a pre-stressing continuous concrete bridge and a pre- stressing continuous concrete rigid-frame bridge. Finally, suggestions on avoiding the longitudinal cracks on the bottom slab in the mid-span are put forward,which can be a useful reference to the design of similar bridges. |
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| Keywords: | bridge engineering line type of bottom slab longitudinal cracking pre-stressing |
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