中山一桥桥面系的方案选择
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摘要
桥面系的方案选择是关系到整座桥的造价以及受力性能的重要因素,广州市中山一桥在进行桥面设计时采用了两个方案,一个是钢-混凝土结合梁体系,另一个是钢箱体系。通过对两种方案的截面几何尺寸、构件内力、挠度和变形曲线、自振周期和振型这几个方面的分析比较,得到它们之间的受力性能异同,结合中山一桥的具体特点和这两种方案下受力性能间的分析比较,最终选定桥面系的方案为钢箱体系。这种体系具有桥面系轻,各主要构件的内力小,桥面的挠度值小,施工速度快的特点,尤其适合于要求施工工期短的城市桥梁,将钢箱体系应用于中山一桥中取得了很好的综合经济效益。通过对中山一桥桥面系方案选择的探讨,旨在为类似桥梁桥面系方案的选择提供参考。
Plan selection concerning bridge floor system is an important factor that affects cost and behavior of a bridge.Two plans(concerning) bridge floor system of Zhongshan No.1bridge in Guangzhou are used,one of that is steel-concrete composite beam system,and the other one is steel-box system.Section sizes,internal forces of members,displacements and deformation curves,natural(vibration) periods and modes concerning the two plans are compared,thus differences and common points of behaviors are obtained,moreover,Zhongshan No.1 bridge is in busy urban area,so at last steel-box system is chosen in view of comparison of behaviors and specialties of the bridge.The conclusion is achieved that steel-box system has lighter bridge floor system smaller internal forces of primary members、smaller displacement and shorter construction period than steel-concrete composite beam system,and steel-box(system) is(especially) fit for urban bridges,that must be finished in short time.Steel-box system is applied in Zhongshan No.1bridge with good(economic) benefits.References and suggestions are provided concerning plan selection of bridge floor system of similar bridges,based on discussion concerning plan selection of bridge floor system of Zhongshan No.1bridge.
Plan selection concerning bridge floor system is an important factor that affects cost and behavior of a bridge.Two plans(concerning) bridge floor system of Zhongshan No.1bridge in Guangzhou are used,one of that is steel-concrete composite beam system,and the other one is steel-box system.Section sizes,internal forces of members,displacements and deformation curves,natural(vibration) periods and modes concerning the two plans are compared,thus differences and common points of behaviors are obtained,moreover,Zhongshan No.1 bridge is in busy urban area,so at last steel-box system is chosen in view of comparison of behaviors and specialties of the bridge.The conclusion is achieved that steel-box system has lighter bridge floor system smaller internal forces of primary members、smaller displacement and shorter construction period than steel-concrete composite beam system,and steel-box(system) is(especially) fit for urban bridges,that must be finished in short time.Steel-box system is applied in Zhongshan No.1bridge with good(economic) benefits.References and suggestions are provided concerning plan selection of bridge floor system of similar bridges,based on discussion concerning plan selection of bridge floor system of Zhongshan No.1bridge.
引文
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[3]童丽萍,郭静.空间组合拱梁体系施工阶段的静力稳定分析[J].桥梁建设,2004,(1):20-23.
[4]郭静,童丽萍.空间组合桥梁体系的动力特性分析[J].世界地震工程,2002,18(4):163-166.
[5]戴公连,李建德.桥梁结构空间分析设计方法及应用[M].北京:人民交通出版社,2001.
[6]R W克拉夫,J彭津.结构动力学[M].北京:科学出版社,1981.
[7]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1992.
[8]周念先.桥梁方案比选[M].上海:同济大学出版社,1997.
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