GOALI: Improving the Reliability of Aluminum Structures During Fire Through Computational Modeling

目标：通过计算建模提高火灾期间铝结构的可靠性

• 批准号: 1400387
• 负责人: Michael Shields
• 金额: $ 34.91万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-06-15 至 2018-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1400387&HistoricalAwards=false
• 关键词: GOALI; Improving; Reliability; Aluminum; Structures

The research objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) project is to construct a probabilistic computational framework for modeling response of aluminum structure in buildings subjected to fire. The results can have a profound impact on the design and analysis practices for aluminum structures (and ductile metal structures in general) by enabling probabilistically informed standards that account for variability in nonlinear material responses. Current methods employing simplistic safety factors apply a large penalty to account for fire risk. The processes developed through this work can result in significant cost saving for numerous industries ranging from civil structural design to automotive, aircraft, and naval vessel design. The research will also afford unique educational opportunities to high school students in the Baltimore area through joint academic-industry mentorship. Graduate students involved in the project will benefit from professional exchange through internship at the industry partner. This project will serve to enhance understanding of the material response of aluminum under simultaneous stress and high temperature by quantifying the uncertainties associated with both the materials and the fire events. The research plan includes assessment of uncertainties at the material level as well as uncertainties related to temperature rate and fire exposure time. The goal is to develop probabilistic reliability analysis that can be incorporated in to finite element software. The program will couple state-of-the-art deterministic computational tools developed by the industry partner which have been shown to accurately model the creep rupture and elastoplastic failure of ductile metals with uncertainty quantification, stochastic simulation, and structural reliability methods developed at the institution. Validation of the analytical model will be done using the previously conducted experimental data available from other sources.

该学术与工业联络资助机会 (GOALI) 项目的研究目标是构建一个概率计算框架，用于模拟建筑物中铝结构在火灾中的响应。通过启用考虑非线性材料响应变化的概率信息标准，结果可以对铝结构（以及一般的延性金属结构）的设计和分析实践产生深远的影响。当前采用简单化安全系数的方法对火灾风险施加了很大的惩罚。通过这项工作开发的流程可以为从土木结构设计到汽车、飞机和海军舰艇设计等众多行业带来显着的成本节省。该研究还将通过学术与行业联合指导为巴尔的摩地区的高中生提供独特的教育机会。 参与该项目的研究生将通过在行业合作伙伴的实习从专业交流中受益。该项目将通过量化与材料和火灾事件相关的不确定性，增强对铝在同时应力和高温下的材料响应的理解。研究计划包括评估材料层面的不确定性以及与温度速率和火灾暴露时间相关的不确定性。目标是开发可合并到有限元软件中的概率可靠性分析。该计划将结合行业合作伙伴开发的最先进的确定性计算工具，这些工具已被证明可以通过该机构开发的不确定性量化、随机模拟和结构可靠性方法准确模拟延性金属的蠕变断裂和弹塑性失效。分析模型的验证将使用之前从其他来源获得的实验数据来完成。