摘要
以三跨独柱单、双支撑连续箱梁为基本结构,针对不同曲线半径、不同边墩支座间距的桥梁建立有限元模型,研究2种结构边墩支座最小反力变化规律,进而分析独柱双支撑连续箱梁桥横向抗倾覆性能及相对于独柱单支撑的改善情况。数值仿真结果表明:边墩支座间距越大,独柱双支撑式桥梁横向抗倾覆能力越强;相对于独柱单支撑式桥梁,独柱双支撑能够很大程度增强梁体的横向抗倾覆稳定性,桥梁曲线半径较小且边墩支座间距较小时效果明显;合理使用独柱双支撑结构形式,适当增大边墩支座间距,可较大程度地提高桥梁横向抗倾覆性能。
Based on two three-span continuous box girder bridges with single column pier that one is single-point support and the other one is double-point support,the finite element models with different radii of the curve and the distances between the supports of the piers at the end of beam were built.The change laws of the minimum reverse force of two kinds of the supports of the piers at the end of beam were studied to analyze the transverse stability against overturning of continuous box girder bridge with single column pier and double-point support and the improvement of double-point support relative to single-point support.The numerical simulation results show that the larger the distance between the supports of the piers at the end of beam,the stronger the transverse stability against overturning of continuous box girder bridge with single column pier and double-point support.Compared with the continuous box girder bridge with single column pier and single-point support,the single column pier continuous box girder bridge with double-point support can largely enhance the transverse stability against overturning.When the radius of the curve and the distance between the supports of the piers at the end of beam is shorter,the effect is more obvious.The rational selection of the single column pier with double-point support and the appropriate increase of the distance between the supports of the piers at the end of beam can greatly increase the transverse stability against overturning of the bridge.
作者
孙琪凯
高岩
SUN Qikai;GAO Yah(China Academy of Railway Sciences Group Co.Ltd.,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2018年第9期8-10,共3页
Railway Engineering
关键词
公路桥梁
抗倾覆稳定性
数值计算
独柱双支撑连续箱梁桥
独柱单支撑连续箱梁桥
Highway bridge
Stability against overturning
Numerical simulation
Continuous box girder bridge withsingle column pier and double-point support
Continuous box girder bridge with single column pier and single-pointsupport
