The Italian “Guidelines for risk classification, safety assessment and structural health monitoring of existing bridges” were recently approved to define the technical principles for the management of the national network of existing bridges. This is a powerful tool to establish a common framework for risk mitigation and safety assessment of reinforced concrete (R.C.) bridges that represent most of the existing stock. The guidelines are code-based and allow practitioners to deal with the concepts behind the modern design in terms of target reliability and partial safety factors as well as properly developed traffic-load models. This paper illustrates a novel methodology for safety assessment and performance class definition of existing R.C. bridges according to the guidelines. A prestressed R.C. bridge is finally presented as a case study to show the completeness of the procedure.

中文翻译：

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根据意大利新指南评估道路交通荷载下的现有钢筋混凝土桥梁

意大利“现有桥梁风险分类、安全评估和结构健康监测指南”最近获得批准，用于定义国家现有桥梁网络管理的技术原则。这是一个强大的工具，可以为代表大部分现有库存的钢筋混凝土 (RC) 桥梁建立风险缓解和安全评估的通用框架。该指南是基于代码的，允许从业者在目标可靠性和部分安全系数以及适当开发的交通负载模型方面处理现代设计背后的概念。本文根据指南说明了现有 RC 桥梁的安全评估和性能等级定义的新方法。预应力钢筋混凝土