CAREER: An Integrated Experimental and Numerical Vulnerability Assessment of Aging Housing Infrastructure and Communities

该学院早期职业发展（CAREER）奖将促进对木材住宅建筑的慢性和急性自然灾害影响之间相互作用的理解，并将使缓解战略的开发和评估能够改善住房功能恢复。该项目的成果将适用于木结构住房基础设施，供地方社区和政府考虑各种社会经济指标，制定灾后恢复或灾前备灾解决方案。此外，这些成果将为建筑规范提供关于老化基础设施的响应和能力的信息，并在新住宅设计中采用环境退化。教育和推广计划将有助于发展和准备未来多元化的STEM劳动力，并进行跨学科培训，以应对21世纪的住房挑战。这项研究将有助于国家科学基金会（NSF）在国家地震减灾计划（NEHRP）中的作用。该项目的总体目标是制定一个全面的框架，以了解，评估和提高老化的木材住宅基础设施的性能受到慢性和急性（地震）自然灾害及其对住房社区的影响。该项目的研究目标是：（a）量化老化木构件的主要环境引起的退化机制，（B）将长期和急性危害下的木构件和建筑物的结构性能与灾后功能恢复时间、健康和住房社区的社会破坏联系起来。为实现这些目标，研究计划将包括两个重点领域，即在建筑物一级和社区一级对老化木材基础设施的脆弱性进行评估，其任务是：（a）对由于生物腐烂和机械退化而老化的木材构件进行实验性调查;（B）考虑到单独和组合老化机制，为木材构件的主要机械性能开发基于贝叶斯的预测模型，（c）在长期和急性灾害的共同作用下对木结构建筑进行结构性能评估;（d）通过考虑到社会脆弱性指标的住房社区整体代理模型，对老化的住房基础设施和社区进行风险分析;以及（e）通过综合优化分析和征求专家反馈意见，改善住房社区功能恢复的缓解战略。该项目产生的数据将在NSF支持的自然灾害工程研究基础设施（NHERI）数据库（https：/www.DesignSafe-ci.org）中存档并公开提供。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This Faculty Early Career Development (CAREER) award will advance understanding of the interplay between chronic and acute natural hazard effects on wood residential buildings and will enable the development and evaluation of mitigation strategies that will improve housing functional recovery. The project outcomes will be applicable to wood housing infrastructure for post-disaster rehabilitation or pre-disaster preparedness solutions by local communities and governments considering various socioeconomic indicators. Additionally, the outcomes will inform building codes on the response and capacity of aging infrastructure and for the adoption of environmental degradation in the design of new homes. The education and outreach plans will contribute to developing and preparing a future diverse STEM workforce with interdisciplinary training to tackle the housing challenges of the 21st century. This research will contribute to the National Science Foundation (NSF) role in the National Earthquake Hazards Reduction Program (NEHRP). The overarching goal of this project is to develop a comprehensive framework for understanding, assessing, and enhancing the performance of aging wood residential infrastructure subjected to combined chronic and acute (seismic) natural hazards and its impact on housing communities. The research objectives of this project are to (a) quantify the dominant environmentally induced deterioration mechanisms of aging wood members and (b) link the structural performance of wood members and buildings under combined chronic and acute hazards to post-disaster functional recovery time, health, and social disruption of housing communities. To achieve these objectives, the research plan will comprise two thrust areas, namely, building-level and community-level vulnerability assessment of aging wood infrastructure with tasks on: (a) experimental investigations of wood members aged due to biotic decay and mechanical deterioration; (b) development of Bayesian-based predictive models for major mechanical properties of wood members considering individual and combined aging mechanisms, and accounting for uncertainties; (c) structural performance assessment of wood buildings under combined chronic and acute hazards; (d) risk analysis of aging housing infrastructure and communities through holistic agent-based models of housing communities accounting for social vulnerability indicators; and (e) mitigation strategies for improved functional recovery of housing communities through integrated optimization analyses and expert feedback solicitation. Data generated from this project will be archived and made publicly available in the NSF-supported Natural Hazards Engineering Research Infrastructure (NHERI) Data Depot (https:/www.DesignSafe-ci.org).This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.