CAREER: A Risk-Based Model to Achieve Sustainable Solutions for Bridge Infrastructure Subjected to Multiple Threats

职业：基于风险的模型，为遭受多重威胁的桥梁基础设施实现可持续解决方案

• 批准号: 1055301
• 负责人: Jamie Padgett
• 金额: $ 42万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1055301&HistoricalAwards=false
• 关键词: CAREER; Risk; Based; Model; Achieve

The research objective of this Faculty Early Career Development (CAREER) award is to develop a new approach to bridge infrastructure enhancement where risks posed by multiple threats are mitigated while balancing broader goals of sustainability. Our nation's bridge infrastructure faces multiple threats, including aging and deterioration, increased demand by a growing population, and natural hazards that may become more frequent with climate change. These threats result not only in physical damage, but cascading social, environmental, and economic impacts that impair sustainability. In the proposed model, "Sustainable Solutions for Bridge Infrastructure Subjected to Multiple Threats (SSIMT)", performance goals are driven by sustainability metrics, such as energy usage, life-cycle cost, and downtime, while ensuring safety. The risk assessment tools for SSIMT are derived through an analytical research approach supported by field data, with case studies conducted with stakeholder input. First, vulnerability models will be developed to uncover the complex coupled effects of storm surge, earthquakes, aging and deterioration, and increased demands on bridge reliability. This physical vulnerability will then be related to metrics of sustainable performance for specific social, environmental, and economic impacts, ranging from safety to downtime, and from life-cycle cost to energy usage. An analytical risk-based method will be formulated to evaluate and select bridge rehabilitation strategies that simultaneously mitigate threats while promoting sustainability.The outcome of this research will be an integrative model to determine sustainable solutions for bridges exposed to multiple threats, benefitting the civil engineering practice, public at large, and new generations of students. Its application will yield bridges that are safer, more cost-effective, and require less energy or emissions throughout their lifetime. The integrated education program aims to cultivate a pipeline of diverse participants in infrastructure engineering prepared to address our nation's infrastructure deficiencies and apply the proposed SSIMT model. Context-based learning will be tested to provide students with an understanding of principles of sustainable engineering and natural hazard risk mitigation through international exchange, stakeholder interaction, and educational games. The pool of engineers and educators in infrastructure engineering will be diversified by recruiting and retaining underrepresented students through mentoring and research experiences. Through these new educational materials, practices, and unique exchange experiences, a pipeline of next generation civil engineers will be prepared with the sustainable engineering concepts, multi-disciplinary teaming, and contextual sensitivity needed to tackle one of our nation?s biggest challenges--safeguarding our critical infrastructure.

该学院早期职业发展（CAREER）奖的研究目标是开发一种新的方法来桥接基础设施增强，其中减轻了多种威胁带来的风险，同时平衡了更广泛的可持续发展目标。 我国的桥梁基础设施面临着多种威胁，包括老化和恶化，人口增长带来的需求增加，以及随着气候变化可能变得更加频繁的自然灾害。这些威胁不仅会造成物理破坏，还会对社会、环境和经济产生连锁反应，损害可持续性。 在所提出的模型“遭受多种威胁的桥梁基础设施可持续解决方案（SSIMT）”中，性能目标由可持续性指标驱动，如能源使用，生命周期成本和停机时间，同时确保安全。 SSIMT的风险评估工具是通过实地数据支持的分析研究方法得出的，案例研究是在利益攸关方的投入下进行的。 首先，将开发脆弱性模型，以揭示风暴潮、地震、老化和退化以及对桥梁可靠性要求的增加等复杂的耦合效应。 然后，这种物理脆弱性将与特定社会，环境和经济影响的可持续性能指标相关，从安全到停机时间，从生命周期成本到能源使用。 将制定一个基于风险的分析方法，以评估和选择桥梁修复策略，同时减轻威胁，同时促进可持续性。这项研究的结果将是一个综合模型，以确定暴露于多种威胁的桥梁的可持续解决方案，使土木工程实践，广大公众和新一代的学生受益。 它的应用将使桥梁更安全，更具成本效益，并且在其整个生命周期中需要更少的能源或排放。 综合教育计划旨在培养基础设施工程的多元化参与者，以解决我国基础设施的不足，并应用拟议的SSIMT模型。 将测试基于上下文的学习，通过国际交流，利益相关者互动和教育游戏，为学生提供可持续工程和自然灾害风险缓解原则的理解。基础设施工程领域的工程师和教育工作者将通过指导和研究经验招募和留住代表性不足的学生来实现多样化。 通过这些新的教育材料，实践和独特的交流经验，下一代土木工程师的管道将准备与可持续的工程概念，多学科的团队合作，和上下文的敏感性需要解决我们的国家之一？最大的挑战是保护我们的关键基础设施。