连续梁桥的抗倾覆稳定性研究

Research on the Anti-overturning Stability of Continuous Beam Bridge

文章详细分析了连续梁桥倾覆破坏的特征和机理,并以某高速公路大桥为例,采用Midas Civil软件建立有限元模型,并采用参数控制变量法研究支座预偏心、支承方式、曲率半径、桥面宽度等因素对主梁抗倾覆稳定性的影响。通过对比分析,结果表明双支座支承体系能改变倾覆轴线位置,减小倾覆力矩,抗倾覆稳定性相较于单支座提升了90%以上。研究内容可为桥梁工程设计和施工提供重要参考,有效提高桥梁的抗倾覆稳定性。

The characteristics and mechanism of overturning failure of continuous beam bridge are analyzed in detail.Taking an expressway bridge as an example,the finite element model is established by Midas Civil software,and the influence of factors such as bearing pre-eccentricity,support mode,curvature radius and bridge deck width on the anti-overturning stability of the main beam is studied by parameter control variable method.Through comparative analysis,the results show that the double bearing support system can change the position of the overturning axis,reduce the overturning moment,and improve the anti�overturning stability by more than 90%compared with the single bearing.The research content of this paper can provide important reference for the design and construction of bridge engineering,effectively improving the anti�overturning stability of the bridge.