CAREER: Impact of Green Roof and Vertical Greenery Systems on Structural Performance for Multi-Hazard Scenarios

该学院早期职业发展(CAROR)奖将通过为绿色基础设施(GI)(即绿色屋顶和垂直绿化结构)产生一种新的设计方法来减少与这些事件相关的金钱损失、死亡和停机时间，从而提高社区应对气候变化和从地震等自然灾害事件中恢复的韧性和能力。应对气候变化需要具有GI的可持续结构。这项研究将通过一套适用于地理标志重量变化的应用指南，解决地震/风力风险地区具有地理标志的建筑的工程师和使用者在资源上的严重缺口，包括各种湿度水平下的相关需求，以实现最佳结构性能。该教育计划包括为本科生和研究生制作一系列关于可持续结构复原力的教育视频，并为来自代表性不足群体的五名大学生助理提供研究经验。此外，开放获取研究结果、设计指南和新的教育材料将为加州州立大学系统的土木工程专业学生、美国执业土木工程师和公众消费者提供信息，以增加可持续发展努力，减少气候变化和自然灾害事件的负面影响。该项目产生的数据将在国家科学基金会支持的自然灾害工程研究基础设施数据库(https://www.DesignSafe-CI.org).)中公开提供该奖项支持美国国家科学基金会在国家减少地震灾害计划中的作用。该奖项的目标是提前了解GI的敏感性、对结构行为的影响以及作为缓解策略的潜力。有必要将结构响应描述为可持续和有弹性的设计之间的综合努力，因为在过去几十年中，GI使用的增长速度已经超过了支持工程界设计努力的研究。该项目的研究目标包括：(1)量化由于自然灾害(即干旱、风暴潮)、自然增长和其他生命周期因素(即维护不善)导致的GI变化导致的结构行为分布；(2)为提高抗震性能制定初步设计战略；以及(3)创建一套考虑GI变化的可持续结构的变革性设计指南。这将通过对振型行为的敏感性分析和使用地震情景的非线性时程分析对战略GI计划进行测试来实现。教育目标是培训下一代土木工程师，让他们了解可持续建筑设计，使用新的、开放获取的教育材料，并让执业土木工程师和公众了解可持续发展努力的积极影响，以减少气候变化和风/地震事件的负面影响。告知和建立工程师对GI设计的信心将：(1)通过改进设计、建模和分析程序提高结构弹性；(2)减少与结构故障相关的人力/经济成本；以及(3)在促进可持续发展的同时增加GI的使用。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势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 contribute to the resilience and capacity of communities to address climate change and recover from natural hazard events, such as earthquakes, by producing a novel design approach for green infrastructure (GI) (i.e., green roof and vertical greenery structures) to decrease monetary losses, deaths, and downtime associated with these events. Sustainable structures with GI are needed to tackle climate change. This research will address a critical gap in resources for practicing engineers and users of buildings with GI in regions with seismic/wind risk with a set of applied guidelines for weight variations of GI, including associated demands at various moisture content levels for optimal structural performance. The educational plan includes an educational video series on sustainable structural resilience for undergraduate and graduate students and research experiences for five university student assistants from underrepresented groups. Further, open access to research results, design guidelines, and new educational materials will inform civil engineering students in the California State University system, practicing civil engineers in the U.S., and public consumers to increase sustainability efforts and decrease negative impacts of climate change and natural hazard events. Data generated from this project will be made publicly available in the National Science Foundation (NSF)-supported Natural Hazards Engineering Research Infrastructure Data Depot (https://www.DesignSafe-CI.org). This award supports the NSF role in the National Earthquake Hazards Reduction Program. The goal of this award is advance knowledge on GI’s sensitivities, influences on structural behavior, and potential as a mitigation strategy. There is an established need to characterize structural response as a combined effort between sustainable and resilient design because the increase in GI usage over the past several decades has outpaced research to support the engineering community in its design efforts. The project’s research objectives include: (1) quantification of structural behavior distributions due to changes in the GI from natural hazards (i.e., drought, storm surge), natural growth, and other life-cycle factors (i.e., poor maintenance); (2) development of an initial design strategy for increased seismic performance; and (3) creation of a transformative set of design guidelines for sustainable structures considering GI variabilities. This will be achieved through sensitivity analyses of modal behavior and testing of a strategic GI plan using nonlinear time history analyses for a seismic scenario. The educational goals are to train the next generation of civil engineers to understand sustainable building designs with new, open-access educational materials and to inform practicing civil engineers and the public about the positive impacts of sustainability efforts that decrease the negative impacts of climate change and wind/seismic events. Informing and building engineering confidence in GI design will: (1) increase structural resilience with improved designs, modeling, and analysis procedures; (2) reduce the human/economic costs associated with structural failure; and (3) increase the use of GI while promoting sustainability.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.