Then the curves of transverse load and the axial thrust follow, which means that the coefficient of movement arm is the most critical to the failure of voussoir beam.

• 初始纵向载荷较低时，3条曲线中力臂系数首先取得峰值，其次是横向载荷曲线，最后是纵向载荷曲线，说明力臂系数对铰接拱破坏最为敏感；