贵州省思南县岩头河大桥不对称连续刚构桥设计思路

Design Thought of Asymmetry Continuous Rigid Frame Bridge on Yantou River in Sinan County Guizhou Province

介绍了连续刚构桥的特点及不对称连续刚构桥产生原因与适应条件。依托岩头河大桥的工程实例,对分跨不对称类型进行结构受力分析,通过分析计算结果总结出不对称结构在恒载、活载、温度及收缩徐变作用下的受力特点,并引入了不对称连续刚构不对称系数概念,给出了不对称连续刚构桥的分跨比例界限;同时总结了在不对称连续刚构设计过程中的注意事项,供不对称连续刚构桥的设计与施工参考。

The article introduces the features of continuous rigid frame bridge and construction theories and conditions of asymmetry continuous rigid frame bridge. Based on Yantou River bridge engineering project, structure stress analysis has been done to the asymmetry type. The loading features of asymmetric structure type under the effect of dead loading, live loading, temperature variation and concrete shrinkage and creeping have been summarized by analyzing the calculation. The concept of asymmetry coefficient of asymmetry continuous rigid frame has been introduced and the proportion limit of asymmetry continuous rigid frame bridge has been given; meanwhile, precautions during the design process of asymmetry continuous rigid frame are summarized, which can provide a reference for the design and construction of asymmetry continuous rigid frame bridge.