阐述了桥梁结构危险性分析的方法论，根据危险性分析服务对象和目的，确定了跨海悬索桥结构危险性分析的内容和方法。在总体危险性分析层面确定需要控制的桥梁结构风险，在单元危险性分析层面确定如何对这些风险的控制，同时将特殊事件和维修等因素也纳入危险性分析，保证了桥梁生命周期内所有风险的无遗漏分析和控制。

The paper states the methodology of SRA (structural risk analysis)of Bridges. In terms of the objects of SRA, the contents and approaches of sea crossing suspension bridge SRA are defined. The risks to be controlled necessarily are concluded by the global risk analysis, and how to achieve the control is worked out by the element risk analysis. Meanwhile, the risks of the external special events and special maintenance are included in the SRA to make sure that all risks are analyzed and controlled and none of risks in the bridge life-cycle is ignored.