| 预应力混凝土连续箱梁合拢段底板开裂机理 |
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| 引用本文： | 潘大荣,赵启林,王景全,姚冰. 预应力混凝土连续箱梁合拢段底板开裂机理[J]. 解放军理工大学学报(自然科学版), 2008, 9(5): 552-556 |
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| 作者姓名： | 潘大荣 赵启林 王景全 姚冰 |
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| 作者单位： | 解放军理工大学,工程兵工程学院,江苏,南京,210007;解放军理工大学,工程兵工程学院,江苏,南京,210007;解放军理工大学,工程兵工程学院,江苏,南京,210007;解放军理工大学,工程兵工程学院,江苏,南京,210007 |
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| 摘 要： | 为了分析预应力混凝土连续箱梁桥在合拢时出现底板上下分层开裂的原因,采用了三维有限元方法对在连续索张拉过程中跨中底板的应力状态进行了计算.定性分析了导致底板上下分层开裂的机理.结果表明,单纯的向下径向力与底板纵向泊松比效应均不是导致底板上下分层的本质原因,而纵向预应力筋在7
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| 关 键 词： | 预应力 箱梁 底板 开裂 有限元分析 |
Mechanism of breaking in bottom slab of prestressed reinforcedconcrete continuous box girder |
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| PAN Da-rong,ZHAO Qi-lin,WANG Jing-quan and YAO Bing. Mechanism of breaking in bottom slab of prestressed reinforcedconcrete continuous box girder[J]. Journal of PLA University of Science and Technology(Natural Science Edition), 2008, 9(5): 552-556 |
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| Authors: | PAN Da-rong ZHAO Qi-lin WANG Jing-quan YAO Bing |
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| Affiliation: | Engineering Institute of Corps of Engineers,PLA Univ.of Sci.& Tech.,Nanjing 210007,China;Engineering Institute of Corps of Engineers,PLA Univ.of Sci.& Tech.,Nanjing 210007,China;Engineering Institute of Corps of Engineers,PLA Univ.of Sci.& Tech.,Nanjing 210007,China;Engineering Institute of Corps of Engineers,PLA Univ.of Sci.& Tech.,Nanjing 210007,China |
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| Abstract: | In order to study the causes o f breaking in the middle of bot tom slab of closed pr est ressed reinforced concrete cont inuous box g irder, 3D FEA ( f inite element analyse) method w as adopted to analyze thest ress of bot tom slab in the co urse of prest ressing cont inuous cable. T he mechanism of breaking was discussedcombined w ith qualitative theo ry analysis. Result shows that in this case only r adial fo rce downwar ds or the ef fect of poisson rat io it self is no t the main cause for the breaks, w hile the radial fo rces bothupw ards in the joint o f 7# and 8# and dow nw ards are the main causes; and the radial force dow nw ards isjust a mino r cause. |
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| Keywords: | prest ressed box girder bot tom slab break FEA ( f inite element analyse) |
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