Initial Stage of the Explosion with a Blast Relief Panel Structure Located in the Roof of the Building


The initial phase of a gas deflagration explosion is considered, taking into account the action of blast relief panel structures in the roof of the building, which provide overpressure relief to protect the building structures from the explosion and maintain their integrity. This, in turn, ensures the protection of people in the building from the collapse of the building itself. The structure is a lightweight panel. It closes the opening in the roof and is buried in it to its thickness. The panel comes into motion under pressure. The movement begins after the pressure force overcomes the resistance, which is composed of the weight of the structure and the bond force of the structure with the roof frame. After the blast relief structure is shifted to the depth of sealing, the space for depressurizing is opened. The dynamics of the panel movement and pressure change are studied before the start of pressure relief through the opening space along the perimeter of the opening.

By the time the panel exits the opening, the explosion pressure may reach values incompatible with the stability of the bearing structures. The paper presents dimensionless complexes that determine the explosion process at this stage. The maximum pressure at this stage of the explosion is determined by the mass per unit area of the blast relief panel, the bursting pressure of the connections of the blast relief panel with the frame, and the ratio of the opening time of the opening to the time of the start of movement of the blast relief panel. The relation of these times depends on the dimensionless complexes defined in the work. An unacceptable increase in pressure at the considered stage of the explosion can occur at any opening area. In general, the process is determined by the properties of the panel, the volume of the room, the speed of combustion and the nature of the panel attachment.

1. Gorev V.A. Ensuring explosion safety of residential buildings. MATEC Web of Conferences. 2018. Vol. 193. DOI: 10.1051/matecconf/201819303046
2. Gorev V.A., Korolchenko A.D. The effect of venting structures on overpressure caused by an indoor explosion. Pozharovzryvobezopasnost = Fire and Explosion Safety. 2022. Vol. 31. № 3. pp. 12–23. (In Russ.). DOI: 10.22227/0869-7493.2022.31.03.12-23
3. Gorev V., Chelekova E. Assessment of structural bearing capacity in case of internal explosion. E3S Web of Conferences. 2021. Vol. 263. DOI: 10.1051/e3sconf/202126302048
4. Pilyugin L.P. Ensuring buildings explosion resistance with the help of safety structures. Мoscow: Assotsiatsiya «Pozharnaya bezopasnost i nauka», 2000. 224 p. (In Russ.).
5. Hochstand S., Leuckel W. On the effect of venting large vessels with mass inert panels. Journal of Loss Prevention in the Process Industries. 1989. Vol. 11. № 2. pp. 89–97.
6. Cooper M.G., Fairweather M., Tite J.P. On the mechanisms of pressure generation in vented explosions. Combustion and Flame. 1986. Vol. 65. Iss. 1. pp. 1–14. DOI: 10.1016/0010-2180(86)90067-2
7. Molkov V.V., Eber R.M., Grigorash A.V., Tamanini F., Dobashi R. Vented gaseous deflagrations: modelling of translating inertial vent covers. Journal of Loss Prevention in the Process Industries. 2003. Vol. 16. Iss. 5. pp. 395–402. DOI: 10.1016s0950-4230(03)00066-4
8. Molkov V., Grigorash A., Eber R, Tamanini F., Dobashi R. Vented gaseous deflagrations with inertial vent covers: State-of-the-art and progress. Process Safety Progress. 2004. Vol. 23. Iss. 1. pp. 29–36. DOI: 10.1002/prs.10002
9. Rastorguev B.S., Plotnikov A.I., Khusnutdinov D.Z. Design of buildings and structures under emergency explosive impacts: textbook. Мoscow: Izd-vo ASV, 2007. 152 p. (In Russ.).
10. Pilyugin L.P. Building structures of explosive production facilities (theoretical foundations of design). Мoscow: Stroyizdat, 1988. 316 p. (In Russ.).
11. Pilyugin L.P. Forecasting the consequences of internal emergency explosions. Мoscow: Pozhnauka, 2010. 380 p. (In Russ.).
12. Lyzhin O.V., Popov H.H., Pasmorgyev B.C. Calculation of building structures for the action of explosive waves. Dinamicheskiy raschet sooruzheniy na spetsialnye vozdeystviya: sprav. proektirovshchika (Dynamic calculation of structures for special effects: designer reference guide). Мoscow: Stroyizdat, 1981. pp. 5–28. (In Russ.).
13. Kotlyarevskiy V.A. Analysis of the work of impulsively loaded beams considering the delay of dynamic yield. Stroitelnaya mekhanika i raschet sooruzheniy = Structural Mechanics and Analysis of Constructions. 1980. № 2. pp. 59–62. (In Russ.).
14. Masri A.R., AlHarbi A., Meares S., Ibrahim S.S. A comparative study of turbulent premixed flames propagating past repeated obstacles. Industrial & Engineering Chemistry Research. 2012. Vol. 51. Iss. 22. pp. 7690–7703. DOI: 10.1021/ie201928g
15. Quillatre P., Vermorel O., Poinsot T., Ricoux P. Large eddy simulation of vented deflagration. Industrial & Engineering Chemistry Research. 2013. Vol. 52. № 33. pp. 11414–11423. DOI: 10.1021/ie303452p
16. Vermorel O., Quillatre P., Poinsot T. LES of explosions in venting chamber: A test case for premixed turbulent combustion models. Combustion and Flame. 2017. Vol. 183. pp. 207–223. DOI: 10.1016/j.combustflame.2017.05.014
DOI: 10.24000/0409-2961-2022-12-29-35
Year: 2022
Issue num: December
Keywords : bearing capacity pressure blast relief panel combustion rate internal explosion pressure relief opening pressure opening
  • Gorev V.A.
    Gorev V.A.
    Dr. Sci. (Phys.–Math.), Prof., Moscow State University of Civil Engineering, Moscow, Russia
  • Chelekova E.Yu.
    Chelekova E.Yu.
    Cand. Sci. (Eng.), Assoc. Prof. of the Department, Moscow State University of Civil Engineering, Moscow, Russia
  • Leshchev N.V.
    Leshchev N.V.
    Student Moscow State University of Civil Engineering, Moscow, Russia