本文件规定了涉及结构的系统风险评估的一般原则。重点是与结构设计、评估、维护和退役相关的战略和运营决策。这还包括制定和校准相关规范和标准。涉及结构的系统可能使社会各阶层的利益相关者面临重大风险。本文件的目的是促进和加强有关监测、减少和管理风险的决策，并以高效、经济高效和透明的方式做好应急准备。在更广泛的风险管理背景下，风险评估为决策者提供了确定是否以及以何种方式处理风险的程序。 本文件提供了识别危险以及评估、评估和处理涉及结构的结构和系统风险的一般框架和程序。 本文件还为代码编写者和设计人员提供了依据，以便根据风险考虑的结果设定合理的目标可靠性水平，如ISO 2394中所述。对于现有结构，其目的是根据本文件中规定的原则，对与原始设计中未考虑的事件或使用变更相关的风险进行评估。本文件还可用于特殊结构的风险评估，具体修改和详细说明后，其设计通常不在现有规范的范围内。

This document specifies general principles of risk assessment for systems involving structures. The focus is on strategic and operational decision-making related to design, assessment, maintenance and decommissioning of structures. This also includes formulation and calibration of related codes and standards. Systems involving structures can expose stakeholders at various levels in society to significant risks. The aim of this document is to facilitate and enhance decision-making with regard to monitoring, reducing and managing risks, and preparing for emergency in an efficient, cost-effective and transparent manner. Within the broader context of risk management, risk assessment provides decision-makers with procedures to determine whether or not, and in what manner, it is appropriate to treat risks. This document provides a general framework as well as a procedure for identifying hazards and estimating, evaluating and treating risks of structures and systems involving structures. This document also provides a basis for code writers as well as designers to set reasonable target-reliability levels, such as stated in ISO 2394, based on the result of risk considerations. For existing structures, it is intended that assessment of the risks associated with the events that were not considered in the original design or with changes in use be implemented according to the principles stated in this document. This document can also be used for risk assessment of exceptional structures upon specific adaptation and detailing, the design of which is not usually within the scope of existing codes.