Elevated Temperature Performance of Shear Connectors for Composite Beams

复合梁剪力连接件的高温性能

• 批准号: 1031099
• 负责人: Michael Engelhardt
• 金额: $ 27.99万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1031099&HistoricalAwards=false
• 关键词: Elevated; Temperature; Performance; Shear; Connectors

The objective of this research is to develop experimental data, analytical models, and design models for the performance of composite shear connectors at elevated temperatures representative of severe fires in buildings. Composite beams play a key role in the performance of steel buildings in fire, and composite shear connectors, in turn, play a critical role in the performance of composite beams. The ability to predict composite beam performance at elevated temperature requires knowledge of shear connector capacity and load-slip response at elevated temperature. There is, however, virtually no data on the elevated temperature behavior of shear connectors, particularly for the important case of formed metal deck slabs, which is the by far the most common case encountered in steel building construction practice in the US. This research will include both experimental and computational studies on the elevated temperature response of composite shear connectors. The focus of the project will be an extensive series of well-instrumented and carefully controlled experiments on shear connectors embedded within concrete slabs. Tests will be conducted at temperatures ranging from 20 deg. to 1000 deg C. The experiments will be supplemented by computational simulations and by the development of analytical and design models for shear connector response.This research will fill an important gap in the current knowledge base on the performance of structural building components exposed to fire and will contribute towards enabling performance-based engineered fire protection of building structures in the US, with an ultimate goal of providing safer and more cost-effective buildings. This project will also contribute towards training of structural engineering students and of fire fighters on structural fire safety.

这项研究的目的是开发实验数据，分析模型和设计模型，以代表建筑物中严重火灾的高温下复合剪切连接器的性能。复合梁在火中的钢结构性能中起着关键作用，而复合剪切连接器又在复合梁的性能中起着至关重要的作用。在升高温度下预测复合束性能的能力需要了解剪切连接器能力和升高温度下的载荷响应。但是，几乎没有关于剪切连接器温度升高的数据，尤其是对于形成的金属甲板板的重要情况，这是迄今为止美国最常见的案例。这项研究将包括有关复合剪切连接器温度升高的实验和计算研究。该项目的重点将是一系列嵌入混凝土板中的剪切连接器上的一系列备受启发性和精心控制的实验。测试将在20度范围为20度的温度下进行。至1000度C。实验将通过计算模拟以及开发用于剪切连接器响应的分析和设计模型的开发。这项研究将填补当前知识基础的重要空白，即有关暴露于火灾的结构建筑组件的性能，并有助于在US中启用基于绩效的建筑物保护结构的最终成本和更具成本效果的效果。该项目还将有助于培训结构工程专业的学生和消防员有关结构性消防安全的培训。