Performance-Based Design and Assessment of Buildings under Extreme Snow Loads

极端雪荷载下建筑物的基于性能的设计和评估

• 批准号: 0926680
• 负责人: Abbie Liel
• 金额: $ 17.5万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-10-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926680&HistoricalAwards=false
• 关键词: Performance; Based; Design; Assessment; Buildings

The objective of this research is to develop a new framework for performance-based design and assessment of buildings subjected to large snow loads. Snow storms in recent years in the U.S. have caused structural failure, requiring costly repairs, interrupting business, damaging building contents and endangering life safety. Performance-based methods can improve the current approach to snow engineering by explicitly accounting for the risks of snow-induced collapse and building closure in decisions about structural design. The research approach progresses from the development of a probabilistic modular framework to relate snow hazard to structural response and building performance, to nonlinear simulation modeling and probabilistic assessment of the risk of collapse and building closure in structures subjected to snow loads, and to the application of snow load design procedures in a multi-hazard context. Deliverables include the demonstration of the application of the performance-based framework for snow design to typical flat-roof and special arena-type structures, tools for evaluating snow design decisions and building code provisions, documentation of research results, and a colloquia series for undergraduate researchers in civil engineering at CU. This research seeks to develop a new tool for design of buildings to resist snow loads, based on improved characterization of risks of structural failure and building closure. These advancements will facilitate decisions to minimize risk to life and property, leading to improved design of individual buildings and reexamination of code provisions for snow loading. These developments are particularly timely due to increasingly variable weather patterns associated with global climate change. The project will engage a diverse group of undergraduate researchers to promote student interest in structures and hazards research and in pursuing graduate students in civil engineering. Undergraduate and graduate researchers will participate in a new department research colloquia organized by the P.I to increase engagement in the department and wider scholarly community.

本研究的目的是开发一个新的框架性能为基础的设计和评估的建筑物受到大雪荷载。近年来，美国的暴风雪造成了建筑结构的破坏，需要昂贵的维修，中断了业务，损坏了建筑物，危及生命安全。基于性能的方法可以改善目前的方法雪工程明确占雪引起的倒塌和建筑物关闭的风险，在结构设计的决定。研究方法的进展，从一个概率模块化框架的发展，雪灾害的结构响应和建筑物的性能，非线性仿真建模和概率评估的倒塌和建筑物关闭的风险结构受到雪荷载，并在多灾害背景下的雪荷载设计程序的应用。这些内容包括将基于性能的雪设计框架应用于典型的平屋顶和特殊竞技场结构的演示，用于评估雪设计决策和建筑规范规定的工具，研究结果的文档，以及CU土木工程本科研究人员的系列研讨会。这项研究旨在开发一种新的工具，用于设计建筑物，以抵抗雪荷载，基于改进的结构故障和建筑物关闭的风险表征。这些进步将有助于决策，以尽量减少对生命和财产的风险，从而改善个别建筑物的设计和重新审查规范规定的雪负荷。由于与全球气候变化有关的天气模式越来越多变，这些发展特别及时。该项目将吸引不同的本科生研究人员，以促进学生对结构和危险研究的兴趣，并在土木工程方面攻读研究生。本科生和研究生研究人员将参加由P.I组织的新部门研究座谈会，以增加部门和更广泛的学术界的参与。