This paper presents the extended travelling fire method (ETFM) framework, which considers both energy and mass conservation for the fire design of large compartments. To identify its capabilities and limitations, the framework is demonstrated in representing the travelling fire scenario in the Veselí Travelling Fire Test. The comparison between the framework and the test is achieved through performing a numerical investigation of the thermal response of the structural elements. The framework provides good characterization of maximum steel temperatures and the relative timing of thermal response curves along the travelling fire trajectory, though it does not currently address a non‐uniform fire spread rate. The test conditions are then generalized for parametric studies, which are used to quantify the impact of other design parameters, including member emissivity, convective heat transfer coefficient, total/radiative heat loss fractions, fire spread rate, fire load density, and various compartment opening dimension parameters. Within the constraints of this study, the inverse opening factor and total heat loss prove to be the most critical parameters for structural fire design.

中文翻译：

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基于性能的结构设计的扩展行进火法框架

本文提出了扩展行进火法（ETFM）框架，该框架同时考虑了大车厢的防火设计中的能量守恒和质量守恒。为了确定其功能和局限性，在VeselíTraveling Fire Test中演示了行车场景的框架。框架和测试之间的比较是通过对结构元件的热响应进行数值研究来实现的。该框架可以很好地表征最高钢温和沿行进火轨的热响应曲线的相对时间，尽管该框架目前尚不能解决火势扩散速度不均匀的问题。然后将测试条件推广到参数研究中，用于量化其他设计参数的影响，包括构件的发射率，对流换热系数，总/辐射热损失率，火势蔓延率，火荷载密度以及各种舱室开口尺寸参数。在这项研究的限制内，反开口系数和总热损失被证明是结构防火设计的最关键参数。