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连续刚构桥组合式桥墩临界荷载分析

DOI: 10.3969/j.issn.1674-0696.2014.01.04, PP. 17-20

Keywords: 连续刚构桥,组合式桥墩,临界荷载,面外失稳,分界点位置,continuousrigidframebridge,combinedpier,criticalload,out-of-planeinstability,cutoffposition

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Abstract:

:?根据弹性稳定理论中的瑞利-里兹法,推导了连续刚构桥中由双薄壁墩与独墩组合而成的组合式桥墩在悬臂施工阶段面外失稳临界荷载计算公式。结合工程实例,探讨了双薄壁墩与独墩分界点位置对11备界荷载和失稳模态的影响。给出了组合式桥墩计入其自重作用的弹性稳定系数计算公式以及双薄壁墩与独墩分界点位置的建议值。

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