Taking a four-track continuous prestressed concrete girder bridge with span arrangement (48 + 2x80 + 48)-m within Ganju Station of Lanzhou-Chongqing Railway as the design example, the paper analyzes the transverse stress of the structure, the effective calculation width, the dislorsion, the worpping and other mechanical effects in the bridge. The paper also analyzes the influencing factors of concrete shrinkage and creep. In addition, the paper provides some structural treatment measures, and introduces how to choice the calculation parameters. Moreover, this paper points out that; the time variable should be led in the continuous girder design, and the indexes within bridge's working life should be controlled too.%借助兰渝铁路桔柑站内(48+2×80+48)m四线预应力混凝土连续梁的设计,通过采用MIDAS程序计算析了结构横向应力、有效计算宽度、畸变、翘曲等力学效应规律和混凝土收缩、徐变影响因素,提出了结构构造处措施和计算中参数的选取,连续梁设计应引入时间变量,结构设计中应考虑桥梁生命期内的指标控制.
展开▼
