曲线变宽连续钢箱梁桥的设计要点

Design Essentials of Curve Widening Continuous Steel Box Girder Bridge

摘要:

对曲线变宽连续钢箱梁采用MIDAS软件建立空间梁单元、空间板单元进行计算分析，优化曲梁单元计算模型更加符合实际受力情况。依据新规范对各个设计要点如：局部稳定折减、剪力滞折减、第二体系、空间腹板配比等分项阐述，总结曲线钢箱梁计算规律与设计要点，提出优化设计思路。根据梁、板单元特性与结构特点合理选择计算模型。

Abstract:

MIDAS software is used to establish the spatial beam element and spatial plate element for the calculation and analysis of a curve widening continuous steel box girder. The optimization of the curved beam element calculation model is more consistent with the actual stress conditions. According to the new code, the design essentials of local stable reduction, shearing force lag reduction, the second system and spatial web proportion are expounded respectively. The calculation rules and design essentials of curve steel box girder are summarized. The idea of optimal design is proposed. Based on the properties of girder, plate element and structure, the calculation model is reasonably selected.