| 预应力混凝土曲线梁桥支承设计初探 |
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| 引用本文： | 李海霞.预应力混凝土曲线梁桥支承设计初探[J].交通科技,2012(2):32-35. |
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| 作者姓名： | 李海霞 |
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| 作者单位： | 北京市市政工程设计研究总院深圳分院 深圳518048 |
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| 摘 要： | 以实际工程为背景,介绍了曲线混凝土桥的受力特点,采用三维空间程序对小半径预应力混凝土曲线梁桥的空间效应进行分析,考虑了不同支承形式对主梁转矩、墩柱内力和支座反力的影响,指出了曲线梁桥根据平面杆系计算不能完全反映各支座的受力情况,还需进行空间计算来确定各支座反力,提出了采取支座预设偏心的措施来改善曲梁扭转效应的方法,探讨了曲线梁桥腹板开裂病害产生的原因。
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| 关 键 词： | 曲线梁桥 支座偏心 转矩 |
Preliminary Study on Reasonable Bearing form of Prestressed Curved Girder Bridge |
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| Li Haixia.Preliminary Study on Reasonable Bearing form of Prestressed Curved Girder Bridge[J].Transportation Science & Technology,2012(2):32-35. |
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| Authors: | Li Haixia |
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| Institution: | Li Haixia(Shenzhen Branch of Beijing General Municipal Engineering Design&Research Institute,Shenzhen 518048,China) |
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| Abstract: | Based on real project,force-bearing characteristics of prestressed curved girder bridge are introduced.Spatial effect of prestressed curved girder bridge was analyzed using MIDAS/CIVIL finite element software program,and the effects of torsional moment in beam,internal force in pier and support reaction were thanked induced by different bearing forms;The results show that support reaction of prestressed curved girder should be decided by spatial analysis results,and results of member model shouldn’t be adopted on account of different in reaction of two bearings,Moreover,it indicated that off-centre of bearings in advance was a effective method to improve the torsional effect of curved girder.Finally,the crazing in webs of concrete box girder was discussed. |
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| Keywords: | prestressed curved girder bridge off-centre of bearings torsional moment |
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