Evaluating the Response of the Steel Bending Frame Against Fire After the Explosion

Document Type : Original Research

Authors
H. Salimi Mozafarabadi 1
S. Hosseini 2
1 Master's Degree, Faculty of Passive Defense, Malek Ashtar University of Technology
2 Assistant Professor, Faculty of Passive Defense, Malek Ashtar University of Technology
10.22034/23.6.8
Abstract
Fire and explosion are often synergistic. A fire may occur after an explosion or a fire may occur first and then an explosion occurs. The consequences of a combined fire and explosion scenario about each component must be considered in the design or evaluation of the structure. The analysis of fire and explosion should be done together and the effects of one on the other should be carefully analyzed. In most researches and design guidelines, fire and explosion phenomena are investigated independently and their interaction is less considered. In this research, this issue is addressed and the fire after the explosion and the interaction and synergy of these two phenomena are studied together. The studied structure is a two-story steel structure with different occupancy (dwelling, office, etc.). which is subject to various explosions and as a result fire caused by the equipment inside the building. Explosive loading has been calculated using UFC 3-340-02 instruction charts and fire load using the concept of fire density and relationships of EUROCODE 1 and EUROCODE 3 regulations. In order to simulate explosive and thermal loading, Abaqus finite element software and combined thermal-deformation dynamic analysis have been used. The temperature caused by the fire has been used as a natural fire, and the cooling and post-cooling stages of the fire have also been investigated. After validating the proposed simulation with two valid laboratory works, the analysis of the structure's response against various types of explosive loads and subsequent fires was performed by a numerical model. The results of these investigations showed that the response and deformation of the structure in the chain combined analysis (applying the interaction of explosion and fire on the structure) compared to the independent combined analysis (independent analysis of the structure against explosion and fire and collecting the responses together) It increases by 15%, and considering the interaction of explosion and fire is not only important but also necessary, and not considering this interaction in most cases will cause the response of the structure to be less than the reality, and as a result, it will cause an unsafe design.

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Subjects

1- RP, API., 2006. Recommended Practice for the Design of Offshore Facilities Against Fire and Blast Loading.
2- Tarinejad, R., Ghanbari, H., Kalate, F., 2018. Effects of blast loading on the response of concrete arch dam (Case study: Karun 4). Modares Civil Engineering journal, 18(1), 43-54.
3- Bakhtiyari, S., Jamali Ashtiani, M. 2019. Heat release rate of materials and fire modelling of Plasco building’s incident.
4- Izzuddin, B. A., Song, L., Elnashai, A. S. and Dowling, P. J. 2000. An integrated adaptive environment for fire and explosion analysis of steel frames—Part II: verification and application. Journal of Constructional Steel Research 53.1: 87-111.
5- Liew, JY Richard and Hong Chen. 2004. Explosion and fire analysis of steel frames using fiber element approach. Journal of structural engineering 130.7: 991-1000.
6- Richard Liew, J. Y. and Hong Chen. 2004. Direct analysis for performance‐based design of steel and composite structures. Progress in structural engineering and materials 6.4: 213-228.
7- Ding, Y., Wang, M., Li, Z. X., and Hao, H. 2013. Damage evaluation of the steel tubular column subjected to explosion and post-explosion fire condition. Engineering Structures 55: 44-55.
8- Arablouei, Amir, and Venkatesh Kodur. 2016. Effect of fire insulation delamination on structural performance of steel structures during fire following an earthquake or an explosion. Fire Safety Journal 84: 40-49.
9- Forni, Daniele, Bernardino Chiaia, and Ezio Cadoni. 2017. Blast effects on steel columns under fire conditions. Journal of Constructional Steel Research 136: 1-10.
10- Guo, Z., Chen, W., Zhang, Y. and Zou, H. 2017. Post fire blast-resistances of RPC-FST columns using improved Grigorian model. International journal of impact engineering 107: 80-95.
11- Chen, W., Pan, J., Guo, Z. and Zou, H. 2019. Damage evaluations of fire-damaged RPC-FST columns under blast loading. Thin-Walled Structures 134: 319-332.
12- Gerasimidis, S., Khorasani, N. E., Garlock, M., Pantidis, P., & Glassman, J. 2017. Resilience of tall steel moment resisting frame buildings with multi-hazard post-event fire. Journal of Constructional Steel Research 139: 202-219.
13- Pordel Maragheh, Babak, Abdolrahim Jalali, and Seyyd Mohammad Mirhoseini Hezaveh. 2020. Effect of Initial Local Failure Type on Steel Braced Frame Buildings against Progressive Collapse. International Journal of Engineering 33.1: 34-46.
14- Roy, Tathagata, and Vasant Matsagar. 2021. Mechanics of damage in reinforced concrete member under post-blast fire scenario. Structures. Vol. 31. Elsevier.
15- U.S. Department of Defense. 2014. Structures to Resist the Effects of Accidental Explosions. UFC 3-340-02.
16- EN 1991-1-2: Eurocode 1: Basis of design and actions on structures. Part 1.2: Actions on structures exposed to fire. Comite Europeen de Normalisation/British Standards Institution.
17- EN 1993-1-2: 2005. Eurocode 3: Design of steel structures - Part 1-2: General rules - Structural fire design. Comite Europeen de Normalisation/British Standards Institution.
18- Yahyaei, M., Saedi-Daryan, A., 2012. Structural fire safety engineering. Darian Engineers Publications. (In Persian).
19- Tao, Zhong, Xing-Qiang Wang, and Brian Uy. 2013. Stress-strain curves of structural steel and reinforcing steel after exposure to elevated temperatures. Journal of Materials in Civil Engineering 25.9: 1306-1316.
20- Yang, Hua, Lin-Hai Han, and Yong-Chang Wang. 2008. Effects of heating and loading histories on post-fire cooling behaviour of concrete-filled steel tubular columns. Journal of Constructional Steel Research 64.5: 556-570.‏
21- Yahyai, Mahmood and Amir Saedi Daryan. 2011. The study of welded semi‐rigid connections in fire. The Structural Design of Tall and Special Buildings 22.10: 783-801.
Modares Civil Engineering journal
Volume 23, Issue 6
November and December 2023
Pages 113-129