| 预应力混凝土连续梁桥合龙顺序对结构内力的影响分析 |
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| 引用本文： | 石云,;朱红礼,;朱红阳,;向木生.预应力混凝土连续梁桥合龙顺序对结构内力的影响分析[J].水运科技信息,2009(5):1-3. |
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| 作者姓名： | 石云 ;朱红礼 ;朱红阳 ;向木生 |
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| 作者单位： | [1]湖北省襄樊市公路管理处,襄樊441003; [2]湖北省宜都市公路管理段,宜都443300; [3]武汉理工大学交通学院,武汉430063 |
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| 摘 要： | 分析了三跨一联连续梁桥悬臂施工不同合龙顺序可能导致主梁与支座间存在＂间隙＂的缺陷,用MIDAS/Civil程序分别计算了在不同合龙工序状态下,结构内力和变形的变化值。结合实例,模拟计算了当主梁与支座间分别存在1～5 mm间隙时,对主梁内力的影响。理论计算表明,当主梁与支座间存在较小间隙时（3 mm以下）,采用适当的合龙工序,在具有季节性施工的地区,更具有工程实用价值。
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| 关 键 词： | 公路桥梁 预应力混凝土结构 工艺控制 有限元分析 |
Influence of Structural Internal Force Caused by Different Closing Order of the Pretressed Concrete Continunous Beam Bridge |
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| Institution: | Ski Yun , Zhu Hongli , Zhu Hongyang , Xiang Musheng (1. Xiangfan Highway Management Bureau of Hubei Province, Xiangfan 441003, China 2. Yidu Highway Management Bureau of Hubei Province, Yidu 443300, China; 3. Tramsportation School,Wuhan University of Technology, Wuhan 430063, China) |
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| Abstract: | Taking a three-span prestressed concrete continuous beam bridge as an example,this article analyzed the probable defect caused by gaps between the main beam and the bearing.The gaps are caused by different closing orders in cantilever construction.Using MIDAS / Civil procedure,the paper respectively calculated the value of the change of internal force and deformation in different closing orders.With an example simulation,it also calculated the internal force of the main beam,considering the existence of 1 - 5mm gaps between the main beam and the bearing. Theoretical calculalion shows that when a small gap （3ram or less） exists between lhe main beam and the bearing, using ap- propriate closing order is more practical to engineering value in areas with seasonal construction. |
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| Keywords: | highway bridge prestressed concrete structures process control finite element analysis |
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