Abstract

This paper presents a uniform and consistent semi-quantitative classification of consequences of failure of buildings as part of a multi-level seismic risk management framework for existing buildings to help building owners make risk-informed decisions for the seismic evaluation and retrofit of existing buildings to minimise the life safety risk. The management framework consists of three levels of risk assessment, namely: (i) Level 1: Preliminary seismic screening; (ii) Level 2: Semi-quantitative seismic risk screening; and (iii) Level 3: Quantitative seismic evaluation. The proposed classification consists in general of three classes, namely: (i) Consequence Class – Low (CC-L), (ii) Consequence Class – Medium (CC-M); and (iii) Consequence Class – High (CC-H). These consequence classes are based on semi-quantitative criteria, including building occupancy, number of people at risk, building area, number of storeys, and mobility and ability to escape. The proposed classification can be used to refine the building importance classification in many codes, standards and guides to yield more uniform classification of consequences of failure that can be integrated with the seismic risk management framework to determine more uniform risks of failure. An example illustrating the application of the proposed classification is provided for the case of office buildings.

摘要

本文介绍了建筑物故障后果的统一一致的半定量分类，作为对现有建筑物的多级地震风险管理框架的一部分，以帮助建筑物所有者为地震评估和改造现有建筑物做出风险相关的决策。降低生命安全风险。管理框架包括三个级别的风险评估，即：（i）第1级：初步地震筛查；（ii）第2级：半定量地震风险筛选；（iii）第3级：定量地震评估。提议的分类大体上分为三个类别，即：（i）结果等级–低（CC-L），（ii）结果等级–中（CC-M）；（iii）结果等级-高（CC-H）。这些结果类别基于半定量标准，包括建筑物占用率，面临危险的人数，建筑物面积，层数以及活动能力和逃生能力。提议的分类可用于完善许多规范，标准和指南中的建筑物重要性分类，以产生更统一的失效后果分类，该分类可与地震风险管理框架集成以确定更统一的失效风险。对于办公楼，提供了一个示例，说明了建议的分类的应用。标准和指南可以对故障后果进行更统一的分类，可以将其与地震风险管理框架集成在一起，以确定更统一的故障风险。对于办公楼，提供了一个示例，说明了建议的分类的应用。标准和指南可以对故障后果进行更统一的分类，可以将其与地震风险管理框架集成在一起，以确定更统一的故障风险。对于办公楼，提供了一个示例，说明了建议的分类的应用。