Analyzing the fire performance of concrete columns and slabs under loading and using options, preventing explosive spalling to ensure the pre-set fire resistance

Author:

Garashchenko A. N.1ORCID,Antonov S. P.2ORCID,Danilov A. I.3ORCID,Pavlov V. V.4ORCID,Novikov N. S.4ORCID

Affiliation:

1. PROZASK, LLC

2. The State Fire Academy of the Ministry of Russian Federation for Civil Defense, Emergencies and Elimination on Consequences of Natural Disasters

3. Research Center of Hazardous Fire Factors, LLC

4. All-Russian Research Institute for Fire Protection of Ministry of Russian Federation for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters

Abstract

Introduction. The authors focus on preventing the explosive spalling of concrete and the fireproofing of reinforced concrete structures. The relevance of this issue is explained by the insufficient number of fire tests of such structures under loading and thermal engineering calculations, needed for an objective analysis of testing results.Goal and objectives. The authors analyze the results of a series of fire tests, involving concrete columns and slabs with and without polypropylene microfiber, if no fireproofing is applied, as well as the results of the same tests involving the same items fireproofed by plates or plaster.Methods. The fire resistance of full-scale specimens of concrete was evaluated according to a standardized testing in a fire furnace under loading. It encompasses additional thermocouple measurements used to make a thermal engineering analysis. The analysis entailed both one- and two-dimensional problem formulations, methods and programmes for the numerical computation of non-stationary temperature fields in fireproof structures.Results. New data, obtained in the course of the fire experiments, show the efficiency of the polypropylene microfiber used to prevent the explosive spalling of concrete. The fire resistance limit is R 120 and R 150 under constant static loading. The fire resistance limit of similar structures, fireproofed by PROSASK Firepanel plates or IGNIS LIGHT plaster, was demonstrated. The specimens show the efficiency of methods and programmes for the one- and two-dimensional numerical analysis of non-stationary temperature fields in fireproof structures. The calculation results are presented for various fireproofing options.Conclusions. The testing results and their thermal analysis represent important items of information necessary to ensure the fire safety and the pre-set fire resistance of concrete structures under loading. They can also be used to outline the development pattern of this experimental and theoretical research project. The efficiency of thermal engineering calculations as a tool for evaluating fire protection parameters and the fire resistance of concrete structures is demonstrated, also as an option to reduce the number of expensive fire tests.

Publisher

Moscow State University of Civil Engineering

Reference28 articles.

1. Meshalkin E.A. Investigation of the process of destruction of concrete products in a fire, taking into account their explosive loss of integrity : Dissertation of the Candidate of Technical Sciences. Moscow, 1979; 216. (rus).

2. McNamee R.J., Bostrom L. Fire spalling-the moisture effect. 1st International workshop on Concrete Spalling due to Fire Exposure-From Real Life Experiences and Practical Applications to Lab-scale Investigations and Numerical Modelling. MFPA Institute Leipzig, Germany. September 3-5, 2009; 120-129.

3. Jansson R. Fire spalling of concrete: Theoretical and experimental studies : Doctoral Thesis in Concrete Structures: KTH Royal Institute of Technology. Stockholm, Trita-BKN, Bulletin, 2013; 117.

4. Golovanov V.I., Pekhotikov A.V., Novikov N.S., Pavlov V.V., Kuznetsova E.V. Fire resistance of reinforced concrete tubings of underground structures with polypropylene fiber. Pozharovzryvobezopasnost/ Fire and Explosion Safety. 2019; 28(5):60-70. DOI: 10.18.18322/PVB.2019.28.05.60-70 (rus).

5. Noikov N.S. Fire resistance of fiber concrete constructions for auto roads tunnels and underground : Dis. Candidate of Technical Sciences. Moscow, 2019; 167. (rus).

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3