连续箱梁桥抗倾覆稳定性分析

Analysis on Stability Against Overturning of Continuous Box Girder Bridge

汲取独柱墩桥梁倾覆事故的经验和教训,采用有限元软件Midas对京哈高速公路杏山枢纽立交改建工程A匝道第三联(4×25m预应力混凝土连续箱梁桥)进行建模分析计算,对其施加各类极限工况下的桥面荷载,并调整布载方式,分析此类桥梁的抗倾覆能力,提出相关验算方法,讨论与连续箱梁桥抗倾覆稳定性的相关因素。

Learning experience and lessons from overturning accident of single - column pier bridge, the modeling analysis and calculation are made on No. 3 （4 ×25m prestressed concrete continuous box girder bridge） of Ramp A in Reconstruction Project of Xingshan Hub Interchange of Jingha Expressway by adopting finite element software Midas, so as to impose bridge deck load under all kinds of limited conditions, and adjust loading mode. The capacity against overturning of such kind of bridge is analyzed, the relevant check calculation method is put forward, and factors relating to stability against overturning of continuous box girder bridge are discussed.