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。
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.
出处
《钢结构》
2014年第5期46-51,共6页
Steel Construction
关键词
钢桁拱桥
仿真
工序优化
斜拉索
温度效应
steel truss arc bridge
simulation
process optimization
cable
temperature effects
