In this paper, the effect of the spandrel on the lateral stability of deck-type arch is analyzed and a formula to determine the critical load is given.

• 本文在模型实验基础上,采用能量方法分析了上承式双肋拱桥的横向稳定性,给出了上承式肋拱桥横向失稳临界荷载计算式。