Similitude Modeling of Structural Damage by Fire

火灾结构损坏的相似建模

• 批准号: 0301643
• 负责人: James Quintiere
• 金额: $ 36.31万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-01 至 2006-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0301643&HistoricalAwards=false
• 关键词: Similitude; Modeling; Structural; Damage; Fire

Similitude Modeling of Structural Damage by Fire 0301643PI: James Quintiere, University of Maryland Dimensionless modeling parameters are presented in order to develop physical scale models to emulate and predict the behavior of full-scale structures in fire with respect to their fire characteristics and the effect of fire on the structure. Experiments will be conducted at three scales to validate and assess the accuracy of the scaling. Fire and structural collapse will be studied for a frame steel construction of a compartment subject to a fully involved fire. The motivation of the study is the collapse of the World Trade Center towers due to fire and aircraft damage. Given appropriate accuracy of the scale model approach, the WTC collapse can be demonstrated to be a valid modeling strategy. The scaling approach has value in design and investigation as the WTC. This is an interdisciplinary proposal between fire and structural engineering. These two disciplines do not normally converse. Yet the fire resistance of buildings has been based on input from both practices. Admittedly, the WTC buildings were constructed with no direct consideration of the actual fire effect other than the requirement in the regulation. No design for fire was explicit. How can this better be done? Scale modeling offers a viable, and perhaps a more accurate approach than computer simulations. Scale modeling is a scientific approach, but it should be validated. Even with no complete success, the results can aid in validating computational modeling. The fire scaling can be an input to computational structural modeling, and can serve to validate computational fire models. This proposal is the first time a complete combination of the fire and structural failure scaled experiment is considered. If successful such scaling will aid in the understanding of structural behavior in fire. Society will benefit from having safer and more reliable buildings.

火灾造成的结构损伤的相似建模0301643 PI：James Quintiere，马里兰州大学提出了无约束的建模参数，以开发物理比例模型，模拟和预测火灾中全尺寸结构的行为，考虑到它们的火灾特性和火灾对结构的影响。 实验将在三个尺度下进行，以验证和评估缩放的准确性。 火灾和结构倒塌将研究一个框架钢结构的隔间受到充分参与火灾。 这项研究的动机是世界贸易中心塔楼因火灾和飞机损坏而倒塌。 考虑到比例模型方法的适当精度，世贸中心倒塌可以被证明是一个有效的建模策略。 该方法具有一定的工程应用价值. 这是火灾和结构工程之间的跨学科建议。 这两个学科通常不会相互匡威。 然而，建筑物的耐火性一直是基于这两种做法的投入。 诚然，世贸中心建筑物的建造没有直接考虑到实际的火灾影响，除了法规的要求。 没有明确的防火设计。 如何才能更好地做到这一点？ 比例模型提供了一个可行的，也许是一个更准确的方法比计算机模拟。 比例模型是一种科学的方法，但它应该得到验证。 即使没有完全成功，结果也可以帮助验证计算模型。 火灾缩放可以是计算结构建模的输入，并且可以用于验证计算火灾模型。 这一建议是第一次考虑火灾和结构破坏比例实验的完整组合。 如果成功的话，这种缩放将有助于理解火灾中的结构行为。 社会将受益于更安全、更可靠的建筑。