| 大跨度钢桁拱桥架设方案优化 |
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| 引用本文： | 陈强,;葛凯,;黄鸿建,;马宏亮.大跨度钢桁拱桥架设方案优化[J].钢结构,2014(5):46-51. |
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| 作者姓名： | 陈强 ;葛凯 ;黄鸿建 ;马宏亮 |
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| 作者单位： | [1]蒙西华中铁路股份有限公司,北京100743; [2]中国铁道科学研究院铁建所,北京100081; [3]中国铁道总公司工程管理中心,北京100844 |
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| 摘 要： | 以宜万铁路大跨度铁路钢桁拱桥——万州长江大桥为工程背景,通过对施工方案进行有限元空间过程仿真进一步优化了杆件安装顺序,并开展线形及应力监控测试,保证架设全过程中钢桁拱的结构安全及稳定;温度效应的理论计算及测试,为选定合龙时机、合龙微调提供了数据支持。采用优化的杆件架设方案顺利实现了大跨度钢桁拱结构的"零误差、零附加应力"合龙,对同类桥梁的施工方案比选和优化具有借鉴意义。
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| 关 键 词： | 钢桁拱桥 仿真 工序优化 斜拉索 温度效应 |
DESIGN SCHEME OPTIMIZATION OF LONG-SPAN STEEL TRUSS ARC BRIDGE |
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| Affiliation: | Chen Qiang ,Ge Kai ,Huang Hongjian, Ma Hongliang (1. Mengxi-Huazhong Railway Co. Ltd, Beijing 100743, China 2. China Academy of Railway Sciences, Institute of Railway Construction, Beijing 100081, China 3. Project Management Center of China Railway Corporation, Beijing 100844, China) |
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| Abstract: | Taking Wanzhou Yangtze River Bridge for example, FEM is applied to simulate the whole bridge construction process in order to optimize truss member assembling sequence. The monitoring of deflection and stress is carried out to assure the structure＇s strength safety and stability. Theoretical computations and measurements of temperature effects are valuable for closure time selection and temperature deformation adjustment. Optimized construction scheme is selected and the middle span is closed under the conditions of ＂zero error and zero additional stress＂. The success of construction of this bridge gives the experience to other similar bridge construction. |
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| Keywords: | steel truss arc bridge simulation process optimization cable temperature effects |
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