山区曲线桥梁设计问题的探讨

Discussion on Design Problem of Curve Bridge in Mountain Area

摘要:

受到道路整体线形的布置和地形的阻碍，山区桥梁在设计过程中直线线形通常不能满足指标要求，所以曲线桥的发展越来越受到人们的关注。直线桥和曲线桥的设计要求大相径庭，针对曲线桥的设计进行了分析研究。主要研究了曲线桥的受力方式、曲线桥的分析方法及不同曲率下桥梁的空间分析。通过利用Midas FEA桥梁建立实体模型，计算分析了曲率半径对支座反力、主梁内外侧挠度差值及应力差值的影响。对桥梁的设计工作提供了相应的理论依据。

Abstract:

Obstructed by the overall linear layout and terrain of a road, the straight line shape of mountain bridges cannot usually meet the index requirements in the design process. Therefore, the development of curved bridges has attracted more and more attention. The design requirements of straight and curved bridges are very different. The design of curved bridges are specially analyzed and studied. The stress mode of curve bridge, the analysis method of curve bridge and the spatial analysis of curve bridge under the different curvatures are mainly studied. By using the MIDAS FEA Bridge to establish a solid model, the influences of the radius of curvature on the bearing reaction force, the differences of deflection and stress between the inside and outside of main beam are calculated and analyzed. The corresponding theoretical basis is provided for the design of bridges.