Recent catastrophic events in Southeast Asia have emphasized that roofs made of wood/steel frames and lightweight metal roofing sheets are the most vulnerable component in the building envelope when subjected to typhoon-induced wind uplift. This also applies to aging cultural heritage (CH) assets, which deserve special consideration because of their intangible value for local communities, and their essential role for inclusive and sustainable socio-economic development through cultural tourism.

This paper introduces a simulation-based framework for fragility analysis and typhoon risk assessment of CH-asset roofs. Fastener pullout and roof-panel pullover are explicitly considered in the proposed framework to model the progressive failure of the roof system. A simplified roof geometry is assumed, requiring limited information about the structure under investigation and low computational resources. Such a low computational burden allows modeling wind-induced demands and component capacities probabilistically as well as considering the effects of load redistributions due to fastener failure and fastener/roof-panel corrosion. Variance-based sensitivity analysis (i.e., Sobol’ indices) based on polynomial chaos expansions of the limit state function is also performed, highlighting the parameters most affecting typhoon-fragility variance and then requiring special attention during data collection. Climate-change impact on the typhoon risk estimates is finally investigated through the use of various scenarios and a time-dependent function modifying the wind hazard profile of the site where the assets of interest are located.

The proposed framework is applied to 25 CH assets in Iloilo City, Philippines. The required input data was collected through rapid visual surveying combined with new technologies, such as drones. It is shown that the proposed framework can be adopted in practice for both risk prioritization at a building-portfolio level and simplified risk assessment at a building-specific level.

东南亚最近发生的灾难性事件强调，在遭受台风引起的风隆起时，由木/钢框架制成的屋顶和轻质金属屋顶板是建筑围护结构中最脆弱的组件。这也适用于老化的文化遗产（CH）资产，由于其对当地社区的无形价值以及它们通过文化旅游对包容性和可持续社会经济发展的重要作用，值得特别考虑。

本文介绍了一种基于模拟的CH资产屋顶脆弱性分析和台风风险评估框架。在提出的框架中明确考虑了紧固件拉出和屋顶面板套穿，以对屋顶系统的渐进式故障进行建模。假定屋顶的几何形状简化，要求有关正在研究的结构的信息有限且计算资源较低。如此低的计算负担允许对风诱导的需求和组件容量进行建模，并考虑由于紧固件故障和紧固件/屋顶面板腐蚀而引起的载荷重新分配的影响。还执行了基于极限状态函数的多项式混沌展开的基于方差的敏感性分析（即，Sobol指数），突出显示最影响台风脆弱性变化的参数，然后在数据收集期间需要特别注意。最后，通过使用各种方案和时变函数来研究气候变化对台风风险估计的影响，该函数会修改目标资产所在站点的风灾概况。

提议的框架适用于菲律宾伊洛伊洛市的25个CH资产。所需的输入数据是通过快速的视觉调查结合无人机等新技术收集的。结果表明，所提议的框架可以在实践中被采用，既可以用于建筑物组合级别的风险优先级划分，也可以用于特定建筑物级别的简化风险评估。