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马掌坝桥为一座简支梁拱组合体系桥,为研究其稳定性,通过改变结构参数,建立了多个空间有限元模型。采用特征值屈曲分析的方法,得出了在横撑形式、吊杆的非保向力效应、宽跨比等参数下的稳定安全系数,并对其常见的失稳模态进行了探讨。
Horseshoe Dam Bridge is a simple supported beam arch bridge system. In order to study its stability, a number of space finite element models have been established by changing the structural parameters. Using the method of eigenvalue buckling analysis, the stability safety factor in the form of bracing, the non-retention effect of boom, the ratio of width to span and so on are obtained, and the common failure modes are discussed.