Fire testing of large-scale structural prototypes is costly and requires highly specialized facilities. For this reason, most of the research on the structural response to fire loading relies on cheaper single-component experiments. However, such experiments do not reproduce the internal force redistribution in a realistic assembly, which plays a pivotal role in determining the failure mode of every component. Hybrid fire testing overcomes this limitation by harnessing fire experiments and numerical simulations in a closed feedback loop. Specifically, the boundary conditions of the tested specimen are updated on-the-fly to match those of a numerically simulated subassembly. In order to test gypsum-plasterboard-based wall assemblies under realistic loading scenarios, the Danish Institute of Fire and Security Technology has recently implemented hybrid fire testing. This paper describes the developed hybrid testing setup and the results of a demonstrative experimental campaign.

大型结构原型的耐火测试成本高昂，并且需要高度专业化的设施。因此，关于火荷载的结构响应的大多数研究都依赖于便宜的单组分实验。但是，这样的实验不能在实际的装配中重现内力的重新分布，这在确定每个组件的失效模式中起着举足轻重的作用。混合式防火测试通过在封闭的反馈回路中利用防火实验和数值模拟来克服此限制。特别是，被测样品的边界条件会实时更新，以匹配数值模拟子组件的边界条件。为了在实际的负载情况下测试基于石膏-石膏板的墙组件，丹麦消防和安防技术学院最近实施了混合式消防测试。本文介绍了已开发的混合测试设置以及演示性实验活动的结果。