铜陵公铁两用长江大桥斜拉索锚固参数设计研究
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摘要
铜陵公铁两用长江大桥为主跨630m的钢桁梁斜拉桥,斜拉索为三索面平行钢绞线拉索。为使该桥斜拉索的设计锚固参数精确可靠,从钢绞线斜拉索的构造、设计原理、各影响因素等方面进行研究。研究表明:钢绞线斜拉索虽在索体构造上不同于平行钢丝斜拉索,但实际锚固点是一致的;锚固参数设计时,成桥索力应按推导水平力用的水平角准确采用,应计入主梁预拱度的影响,桥塔预偏不大时可忽略。
The Tongling Changjiang River Rail-cum-Road Bridge is a steel truss girder cablestayed bridge with a main span of 630m.The stay cables composed of parallel steel strands are arranged in three cable planes.To ensure that the stay cable anchoring parameters designed for the bridge are accurate and reliable,the study was carried out from aspects of the composition,design principles and influencing factors of the stay cables made of steel strands.The results of the study show that the stay cables made of steel strands,in terms of composition,are different from those made of parallel steel wires,but the actual anchoring points of them are the same.When the anchoring parameters are designed,the cable forces in the complete bridge state must be applied accurately according to the horizontal angles used for the derivation of the horizontal forces,the impact of the pre-camber of the main girder must be considered,but when the pre-offsetting of the bridge pylon is not too big,the pre-camber of the main girder can be ignored.
The Tongling Changjiang River Rail-cum-Road Bridge is a steel truss girder cablestayed bridge with a main span of 630m.The stay cables composed of parallel steel strands are arranged in three cable planes.To ensure that the stay cable anchoring parameters designed for the bridge are accurate and reliable,the study was carried out from aspects of the composition,design principles and influencing factors of the stay cables made of steel strands.The results of the study show that the stay cables made of steel strands,in terms of composition,are different from those made of parallel steel wires,but the actual anchoring points of them are the same.When the anchoring parameters are designed,the cable forces in the complete bridge state must be applied accurately according to the horizontal angles used for the derivation of the horizontal forces,the impact of the pre-camber of the main girder must be considered,but when the pre-offsetting of the bridge pylon is not too big,the pre-camber of the main girder can be ignored.
引文
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[10]秦顺全.无应力状态控制法斜拉桥安装计算的应用[J].桥梁建设,2008,(2):13-16.
[2]周孟波.斜拉桥手册[M].北京:人民交通出版社,2004.
[3]秦顺全.武汉天兴洲公铁两用长江大桥关键技术研究[M].北京:人民交通出版社,2009.
[4]王韶华,高海安,石艺歌.黄冈公铁两用长江大桥大规格斜拉索冷铸锚固体系质量控制[J].世界桥梁,2013,41(2):66-70.
[5]堀高夫,村山茂明.悬索理论及其应用[M].北京:中国林业出版社,1992.
[6]谷利雄,林桢楷,王荣辉.斜拉索无应力索长的实用迭代算法[J].中外公路,2012,(1):149-151.
[7]曹东威,魏云祥.苏通大桥钢箱梁锚箱定位精度控制技术研究[J].世界桥梁,2009,(1):23-25.
[8]肖海珠,徐伟,高宗余.安庆铁路长江大桥设计[J].桥梁建设,2009,(5):6-8,20.
[9]石建华,朱运河,李卫华,等.武汉天兴洲公铁两用长江大桥斜拉桥施工监控[J].世界桥梁,2010,(2):24-28.
[10]秦顺全.无应力状态控制法斜拉桥安装计算的应用[J].桥梁建设,2008,(2):13-16.
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