And the different damage state of a platform structure can be defined as the reparable damage state and the failure state.(5) The concept of structural seismic safety margin coefficient is proposed.

• (5)在导管架式海洋平台地震破坏分析的基础上，提出了结构抗震安全裕度系数的概念。并针对平台结构进入破坏阶段后的中等破坏状态和局部倒塌状态，给出了相应的表达式。