ON THE ISSUE OF DETERMINING THE QUALITY OF FOAMING AGENTS DURING THEIR STORAGE AT FACILITIES

В статье представлены результаты анализа экспертных заключений по отчетным материалам, выполненным испытательными пожарными лабораториями ФГБУ ФПС в 2021 году по контролю качества пенообразователей и смачивателей, хранящихся в пожарных частях, на объектах, а также в установках пожаротушения. There are presented the results of analysis of expert reports on the reporting materials carried out by fire testing laboratories of FGBU FPS in 2021 concerning quality control of foaming agents and wetting agents stored in fire departments, at facilities, as well as in fire extinguishing installations.

A Review of the Structural Fire Performance Testing Methods for Beam-to-Column Connections

The structural fire performance tests for beam-to-column connections are critical in determining their fire performance at high temperatures. The current standard fire testing methods provide the procedures for establishing the fire resistance of each construction element exposed to a standard fire. However, these methods cannot verify the fire behaviour of the connections between building elements. Researchers have performed numerous fire tests on beam-to-column connections despite the lack of structural fire performance testing methods. This paper presents a comprehensive literature review of the structural fire performance testing methods for beam-to-column connections. The major areas in this review are travelling fires, development of travelling fires on beam-to-column connections, fire testing considerations, fire testing criteria, recent fire testing, and loading applications. This paper identifies the key issues and challenges of the structural fire performance testing methods for beam-to-column connections. Finally, this paper provides recommendations and discusses the way forward for structural fire performance tests on beam-to-column connections.

Predicting and comparing the fire performance of a small-scale composite structure

The purpose of this paper is to investigate a strategy for the fire testing of reduced scale structural models which will help engineers design safer structures and reduce the loss from fires. The concept of this work is how composite frame floor arrangements, beam-column connections might be modelled at a small scale suitable for fire testing. Testing full-scale is expensive, besides the testing of scaled model produces reasonable results which help us to understand the failure mechanism and all significant thermo-structural responses involved in a fire. Thermal effects within a structural element generate fire curve, thermal input and structural displacement output, in other words cause and impact. Dimensional analysis, which is a condition for dynamic similarity between prototype and model, can be achieved when all the dimensionless groups are set equal for both model and prototype. On the other hand, scaling rules are used to decide how much insulating material will be used on a structure. 5-storey composite building with composite floors and steel columns has been modelled at small scale with 1/5. The obtained results from various parametric investigations show that the reduced scale model fire test method would be a feasible way to investigate the fire performance of composite structures.

Multi-Axial Hybrid Fire Testing based on Dynamic Relaxation

This technical note presents the experimental validation of a hybrid fire testing coordination algorithm recently developed by some of the authors. For the first time, the algorithm is applied to solve the static response of a multiple-degrees-of-freedom hybrid model.