According to the bearing capacity , rigidity , failure mode and deformation capcacity , the paper put forward four - line restoring force style of multi - ribbed slab . through multiple experment date compare , the paper concluded the reduction factor of rigidity of other stage to elastic stage 根據密肋復合墻板的承載力、剛度以及破壞模式與變形性能,提出了密肋復合墻板的四線型恢復力模型,在此基礎上根據多次試驗數據擬和進而得出其它各階段的剛度相對于彈性剛度折減系數。