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引用次数: 0
摘要
钢连接的失效会导致整个结构的逐步倒塌。对高温下的钢连接件进行精确建模，可使结构防火工程师在设计钢结构时应对火灾的严重程度。prEN 1993-1-14 提出了钢连接静态设计检查的数值设计计算方法。本文提出了一种基于构件的有限元模型（CBFEM），用于设计高温下的 T 型管。生成的模型与分析模型和实验研究的结果进行了验证和确认。阻力、失效模式和载荷-变形曲线被用来验证 CBFEM 模型在高温下的钢连接设计。结果表明，CBFEM 是在高温条件下建立螺栓连接模型的实用设计工具，可以将 EN 1993-1-5 推荐的 5%塑性极限应变用于螺栓连接的防火设计。
Numerical Design Calculation of T-stubs at Elevated Temperatures
The failure of steel connections can lead to the progressive collapse of the entire structure. Accurate modelling of steel connections at elevated temperature allows structural fire engineers to design steel structures that may deal with the severity of a fire. The prEN 1993-1-14 proposes numerical design calculation for the static design check of steel connections. This paper presents a component-based finite element model (CBFEM) to design the T-stubs at elevated temperatures. The generated model is verified and validated against the results from the analytical model and experimental study. The resistance, failure modes and the load-deformation curves are used to validate and verify the CBFEM models for steel connection design at elevated temperatures. The results stated that the CBFEM is a practical design tool to model bolted connections at elevated temperatures and it is possible to apply the recommended 5% plastic limit strain by EN 1993-1-5 for fire design of bolted connections.
期刊介绍：
Fire Technology publishes original contributions, both theoretical and empirical, that contribute to the solution of problems in fire safety science and engineering. It is the leading journal in the field, publishing applied research dealing with the full range of actual and potential fire hazards facing humans and the environment. It covers the entire domain of fire safety science and engineering problems relevant in industrial, operational, cultural, and environmental applications, including modeling, testing, detection, suppression, human behavior, wildfires, structures, and risk analysis.
The aim of Fire Technology is to push forward the frontiers of knowledge and technology by encouraging interdisciplinary communication of significant technical developments in fire protection and subjects of scientific interest to the fire protection community at large.
It is published in conjunction with the National Fire Protection Association (NFPA) and the Society of Fire Protection Engineers (SFPE). The mission of NFPA is to help save lives and reduce loss with information, knowledge, and passion. The mission of SFPE is advancing the science and practice of fire protection engineering internationally.
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