梁格法求转体曲线桥预偏心的方法研究  

Research on Method of Calculating Pre-eccentricity of Rotary Curved Bridge by Grillage Method

作　　者：薛达 XUE Da

机构地区：[1]广东省铁路规划设计研究院有限公司,广东广州510000

出　　处：《城市道桥与防洪》2022年第9期222-227,M0019,M0020,共8页Urban Roads Bridges & Flood Control

摘　　要：转体曲线桥预偏心值的计算精度要求比一般弯梁桥要求更高,是转体成功的重要因素之一,而理论公式推导难度大,实体建模耗时久,影响设计时效。以2×68 m转体曲线桥为背景,对梁格法求预偏心进行方法研究,先由矩形曲线梁入手,理论推导预偏心公式,再辅以大量梁格模型进行结果对比,得出一般规律,并提出梁格收敛法求预偏心,并将方法逐步推广至箱梁结构。研究成果可对转体曲线桥的预偏心准确设置提供指导作用。The calculation accuracy of the pre-eccentricity value of the rotary curved bridge is more demanding than that of the general curved bridges,which is one of the important factors for the success of the rotation.However,the theoretical formula is difficult to derive and the entity modeling takes a long time,which will affect the design timelines.Based on the background of 2×68 m rotary curved bridge,the pre-eccentricity method by the grillage method is studied.Firstly,the pre-eccentricity formula is theoretically derived from the rectangular curved beam,and then the results are compared with a large number of grillage models to obtain the general rules.The grillage convergence method is proposed to obtain the pre-eccentricity,and the method is gradually populated to the box girder structure.The research results can provide the guidance for the calculation accuracy of the pre-eccentricity of the rotary curved bridge.

关 键 词：桥梁工程 预偏心计算 数值计算 转体曲线桥 梁格法 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]