On the basis of the Mohr-Coulomb yield criterion, an internal force yield condition expressed by the bent moment is deduced by analyses of the internal forces of plate unit in differing forced states.

• 以不同受力状态下圆板单元体进入塑性极限状态时的内力分析为基础，建立了圆板在摩尔库仑准则基础上用弯矩表示的内力屈服条件。