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首页> 外文期刊>Journal of Constructional Steel Research >Response of high-strength steel beam and single-storey frame in fire: Numerical simulation
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Response of high-strength steel beam and single-storey frame in fire: Numerical simulation

机译：高强度钢梁和单层框架在火灾中的响应：数值模拟

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The design principles for high strength steel (HSS) structures exposed to fire are under development. In this paper, the response of HSS structures in fire is studied through numerical simulation of a beam and a two-bay frame. Geometrical imperfections and residual stresses are introduced into the structural models. Deformation limit criteria are used to compare the critical temperatures of the structures made of HSS and mild steel. The comparisons show that HSS structures have higher strength reserve than mild steel structures. Using the mechanical properties at elevated temperatures from literature sources, it is observed that the deflection behaviour of the studied structures depends on the ratio of strength to elastic modulus. The deflection of the studied beam is sensitive to yield strength reduction factors as the beam fails by plastic hinge mechanism. Whereas, the deflection of the HSS frame is sensitive to the reduction factors of the elastic modulus as the frame fails by inelastic instability. The above-mentioned observations on the studied structures are made using a three-stage mechanism which is developed for interpreting the deformation response. (C) 2018 Elsevier Ltd. All rights reserved.
机译：正在开发着火的高强度钢（HSS）结构的设计原理。本文通过梁和两跨框架的数值模拟研究了HSS结构在火灾中的响应。将几何缺陷和残余应力引入结构模型。变形极限标准用于比较由高速钢和低碳钢制成的结构的临界温度。比较表明，HSS结构比软钢结构具有更高的强度储备。使用文献来源的高温下的机械性能，可以观察到所研究结构的挠曲行为取决于强度与弹性模量的比率。由于塑料铰链机制导致梁失效，因此研究梁的挠度对屈服强度降低因子敏感。然而，当框架由于非弹性不稳定性而失效时，HSS框架的挠度对弹性模量的减小因子敏感。对研究结构的上述观察是使用三阶段机制进行的，该机制是为解释变形响应而开发的。 （C）2018 Elsevier Ltd.保留所有权利。

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