武汉大道金桥主桥的设计
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摘要
为探索跨铁路站场大型变宽斜拉桥的结构特点及其关健技术,对武汉大道金桥的设计和计算分析过程进行了总结。金桥为独塔双索面预应力混凝土斜拉桥,跨径组合为(138+81+41)m,桥面宽39~49.9m,塔、墩、梁固结体系;主梁采用双边箱梁截面,桥塔为混凝土结构、高79.0m,斜拉索采用扇形空间索面布置。结构分析采用有限元软件MIDAS进行总体受力分析,并采用ANSYS对桥塔锚索区顶部三个节段进行局部受力性能分析和优化,通过试验及计算对该桥的抗震及抗风性能开展了专题研究。结果表明该桥的强度、刚度等各项检算值均满足规范要求。
To probe into the structural features and key techniques of overpass and gradient width cable-stayed bridge,the design,calculation and analysis processes of the Jinqiao bridge in Wuhan road were summarized.The bridge is a prestressed concrete cable-stayed bridge with a single pylon and double cable plane.Its span arrangement is(138+ 81+41)m,deck width is 39~49.9mand structural system is the rigid fixity system of pylon,pier and girder.The pylon is the concrete structure that is 79.0mhigh,the stay cables are arranged in spatial cable plane of fan type.In the process of the design,the finite element software MIDAS was used to analyze the global force conditions of the bridge, the software ANSYS was used to calculate,analyze and optimize the local force behavior of anchor zone in pylon.The results indicate that the various checking calculation values of the strength and rigidity of the bridge can satisfy the relevant requirement in the codes.
To probe into the structural features and key techniques of overpass and gradient width cable-stayed bridge,the design,calculation and analysis processes of the Jinqiao bridge in Wuhan road were summarized.The bridge is a prestressed concrete cable-stayed bridge with a single pylon and double cable plane.Its span arrangement is(138+ 81+41)m,deck width is 39~49.9mand structural system is the rigid fixity system of pylon,pier and girder.The pylon is the concrete structure that is 79.0mhigh,the stay cables are arranged in spatial cable plane of fan type.In the process of the design,the finite element software MIDAS was used to analyze the global force conditions of the bridge, the software ANSYS was used to calculate,analyze and optimize the local force behavior of anchor zone in pylon.The results indicate that the various checking calculation values of the strength and rigidity of the bridge can satisfy the relevant requirement in the codes.
引文
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[4]邵旭东.桥梁设计与计算[M].北京:人民交通出版社,2007.
[5]刘士林.斜拉桥[M].北京:人民交通出版社,2004.
[6]中铁二院武汉勘察设计研究院有限责任公司.武汉市黄浦大街-金桥大道快速通道工程施工图设计[Z].武汉,2010.
[7]张众,陈孔令,刘黎阳,等.六库怒江二桥设计[J].桥梁建设,2013(S1):59-65.
[8]吴宏业,于传君.鸭绿江界河公路大桥主桥桥型方案比选[J].桥梁建设,2013(S1):83-88.
[9]王吉连,陈开桥,毛伟琦.武汉大道跨铁路斜拉桥主跨现浇段支架设计[J].桥梁建设,2013(S1):103-108.
[10]JTG D62—2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].中华人民共和国交通部,2004.
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