KR102066132B1 - A fiber reinforced blast resistance door - Google Patents

Abstract

The present invention relates to an explosion-proof door reinforced with a steel sheet and fiber-reinforced concrete. The explosion-proof door includes: an inner steel sheet; an outer steel sheet spaced therefrom; lateral steel sheets (30) combined with lateral parts of the inner and outer steel sheets; and a concrete filling part (50) filling a space between the inner and outer steel sheets (10, 20). In order to prevent concrete from being peeled off from the inner and outer steel sheets due to explosion force, a plurality of engagement members (11, 21) protruding from the inner surface of one of the inner and outer steel sheets (10, 20) are formed to be engaged with the concrete (51) of the concrete filling part (50). Therefore, the concrete can be prevented from being peeled off from the inner and outer steel sheets through the engagement protrusions protruding from the inside of the inner and outer steel sheets, and further, reinforcement fibers included in concrete mortar along with rebars spaced at a predetermined distance from the inner and outer steel sheets can keep the concrete from being broken into small pieces by explosion pressure. Therefore, the durability of the explosion-proof door against bending and a tension cracking can be enhanced, and the penetration resistance to an explosive can be improved. Moreover, the peeling-off of the concrete coming into contact with the inner and outer steel sheets as well as the breakage of the front and rear sides thereof can be prevented, and the thickness and rebar volume of a concrete layer can be reduced. Therefore, the door can be lightened and production costs can be lowered.

Description

Explosion-proof door of composite structure reinforced with steel plate and fiber reinforced concrete {A FIBER REINFORCED BLAST RESISTANCE DOOR}

The present invention relates to an explosion-proof door, in particular, the composite structure of the fiber-reinforced concrete filled between the steel plates inside and outside the door, the front fragments peeled off due to the impact of the explosion, and the small pieces of concrete inside by the impact force transmitted The present invention relates to an explosion-proof door of a composite structure reinforced with a steel plate and fiber reinforced concrete which has improved durability by suppressing cracking and cracking of the back of the furnace.

In general, the doors for entrances and exits of structures or shelters related to military installations, nuclear power plants and major national installations, such as ammunition, where explosives are stored, are intended to prevent explosion or explosives of ammunition or explosives contained therein against the explosion of explosives by terrorism or direct attack Explosion-proof performance with resistance to external shocks and explosions is very important for protection.

The explosion-proof door is conventionally formed by filling the concrete (2) in the inner and outer steel sheet (1), as shown in Figures 1 and 2, but the concrete is peeled off from the steel sheet due to the weight of the explosion-proof door and cost reduction and explosion force There was a problem that the durability is reduced by being broken or cracking finely.

In order to improve the durability of explosion-proof doors, Korean Patent Publication No. 10-2016-0144554 (published December 19, 2016) includes water, binders, aggregates, bundle steel fibers, and organic fiber bundles ( A method for producing high toughness composite fiber reinforced concrete using organic / inorganic composite fibers by molding and moisturizing a mortar including bundle type organic fibers) is disclosed.

As another example, Korean Patent No. 10-1818145 (registration date January 08, 2018) is a concrete member in which steel fibers are mixed, and the steel fiber reinforcement in which the steel fibers are disposed in an area where tensile force is generated by an explosion outside the structure. Including a part, the protective explosion-proof concrete member is a wall of the reinforcing bar is assembled, the protective explosion-proof concrete member construction method in which the steel fiber reinforcement is formed in the inner region of the wall is disclosed.

However, the explosion-proof concrete reinforced by steel fibers in the above-described prior art has a problem in which concrete fragments are scattered due to explosion pressure, which may cause death, and even when steel plates are installed on the outside, the concrete inside may be peeled off or cracked. There was a problem that the durability is reduced.

Korean Laid-Open Patent Publication No. 10-2016-0144554 (published December 19, 2016) Domestic Patent No. 10-1818145 (Registration date Jan. 08, 2018)

An object of the present invention, in order to solve the problems of the explosion-proof door of the prior art, while embedding the fiber-reinforced reinforced concrete between the inner and outer steel sheets, the concrete inside the inner and outer steel sheet is not peeled off even under explosion pressure In addition, it is to provide a explosion-proof door of the composite structure reinforced with steel sheet and fiber reinforced concrete, which is reinforced with reinforced concrete so that cracks are suppressed so as not to be broken finely.

In order to achieve the above object, the explosion-proof door of the composite structure reinforced with steel sheet and fiber reinforced concrete according to the present invention, the inner steel sheet, the outer steel sheet spaced therefrom, the side steel plate is coupled to the sides of the inner and outer steel sheets In the explosion-proof door having a concrete filling portion filled between the inner and outer steel sheet,

In order to prevent the concrete from being separated from the inner and outer steel sheets by the explosive force, a plurality of engaging members protruding integrally from the inner surface of at least one of the inner and outer steel sheets are formed to engage with the concrete of the concrete filling part. It is characterized by the above-mentioned.

The concrete filling part is placed in the concrete reinforcement state between the inner and outer steel plates, the reinforcing bars are spaced apart at regular intervals in a lattice form at positions spaced apart from each other at predetermined intervals from the inner and outer steel sheets Is installed.

The engaging members are preferably extended in width at the free end to engage with the concrete of the filling portion filled between the inner and outer steel sheets.

In addition, the concrete filling part is formed by pouring concrete reinforcing fiber yarn in the concrete composition, the reinforcing fiber yarn is formed from any one selected from steel fibers, nylon fibers, polypropylene fibers, PVA fibers, cellulose fibers, PET fibers Can be.

The explosion-proof door of the composite structure reinforced with the steel sheet and the fiber reinforced concrete according to the present invention does not peel off the concrete inside and outside the steel sheet by a plurality of biting protrusions formed to protrude inside the inner and outer steel sheets, The reinforcing fibers included in the concrete mortar together with the reinforcing bars that are spaced apart at predetermined intervals from the outer steel sheets prevent the concrete from being crushed finely against the explosion pressure, thereby improving the durability of the explosion-proof door bending and tensile cracking due to the explosive force. In addition, the penetration resistance of the bomb is improved, cracking is suppressed, and the thickness of the concrete layer and the amount of rebar are reduced, and the weight is reduced and the cost is reduced. There is an effect that can be done.

1 is a front view of a state in which a part of a conventional explosion-proof door is cut open and disassembled.
2 is a cross-sectional view of the explosion-proof door of FIG.
Figure 3 is a schematic exploded perspective view of the explosion-proof door of the composite structure reinforced with steel sheet and fiber reinforced concrete according to the present invention.
Figure 4 is a front view with a partially cross-sectional view showing that the explosion-proof door of Figure 3 is assembled and reinforced with reinforcing bars inside and filled with concrete.
FIG. 5 is a sectional view, partially enlarged in FIG. 4; FIG.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the explosion-proof door of the composite structure reinforced with steel sheet and fiber reinforced concrete of the present invention will be described in more detail the present invention.

3 to 5, the explosion-proof door of the composite structure reinforced by the steel sheet and the fiber reinforced concrete according to the present invention, the outer steel sheet 10, the inner steel sheet 20 spaced therefrom, the inner and outer steel sheet (10, Side steel plates 30 coupled to the sides of the 20 and the concrete filling section 50 reinforced with reinforcing fibers filled between the inner and outer steel sheets (10, 20).

The upper and lower ends of the inner steel sheet 20 and the side ends of both side steel sheets 30 are bent and then bent again to form flanges 22, 23, and 31, and the outer steel sheet to the ends of the side steel sheets 30. 10 is joined to the flanges and sealed.

The concrete filling unit 50 is formed by pouring concrete in a state in which the reinforcing bar 40 is disposed between the inner and outer steel sheets 10 and 20.

3 and 5, in the state where the reinforcing bars 40 are spaced apart at regular intervals in a lattice form at positions spaced apart from each of the inner and outer steel sheets 10 and 20 at predetermined intervals, respectively, as shown in FIGS. Concrete 51 is filled is formed.

A plurality of engagement members 11 and 21 protruding integrally from the inner surface of at least one of the inner and outer steel sheets 10 and 20 are formed, and in the illustrated embodiment, the inner and outer steel sheets 10 and 20. It is preferable that the plurality of engaging members 11 and 21 are formed to be disposed away from each other on the inner surfaces of the teeth.

The free ends of the engaging members 11 and 21 are expanded in diameter or width so as to be engaged with the concrete 51 of the concrete filling part 50 filled between the inner and outer steel sheets 10 and 20 so that the concrete surface may be exploded. It is broken to support concrete from peeling off from the inner and outer steel sheets.

In addition, the concrete filling unit 50 is mixed by placing the concrete reinforcing fiber yarn 53 in the concrete composition, it is preferable to prevent being broken into small pieces by the crack, explosion force of the concrete. For example, the reinforcing fiber yarns may be formed from any one selected from steel fibers, nylon fibers, polypropylene fibers, PVA fibers, cellulose fibers, and PET fibers. The reinforcing fiber yarns are preferably filled with concrete aggregate and mixed uniformly.

In accordance with the present invention, the concrete is mixed with the reinforcing fiber yarns in the state where the reinforcing bar is reinforced between the inner and outer steel plates by the engaging members 11 and 21 formed to protrude on each of the inner surfaces of the inner and outer steel sheets. Composed of steel plate and fiber reinforced concrete composite structure, it minimizes warpage and tensile crack of explosion-proof door due to explosive force, and front fracture that breaks and peels off the concrete surface facing outer steel plate by impact load generated during explosion. The impact is transmitted to the rear side to prevent the rear fracture phenomenon up to the concrete rear surface facing the inner steel plate, and the penetration resistance of the bomb is greatly improved, and thus the impact resistance and durability against the explosive force are improved, so that it is relatively By reducing the thickness of the concrete and reducing the amount of rebar, the weight of the explosion-proof door can be reduced and the cost can be reduced. There.

The present invention can be used in protective and explosion-proof doors that require durability against impact and explosion-proof.

10,20,30: steel plate 11,21: engaging member
40: rebar 50: filling part
51 concrete 53 reinforced fiber yarn

Claims (4)

Between the outer steel sheet 10, the inner steel sheet 20 spaced therefrom, the side steel plates 30 coupled to the sides of the inner and outer steel sheets 10 and 20, and the inner and outer steel sheets 10 and 20. In the state in which the reinforcing bar 40 is disposed in the concrete reinforcing fiber yarns (53) mixed with concrete is poured into the concrete filling unit 50 is filled, the reinforcing bars are each of the inner and outer steel sheets (10, 20) In the explosion-proof door of the steel plate and fiber-reinforced concrete composite structure is installed at intervals spaced apart at predetermined intervals from the reinforcing bars 40 are installed at regular intervals,
Protrude from the inner surfaces of each of the inner and outer steel sheets 10 and 20 so as to prevent the concrete from being peeled off from the inner and outer steel sheets by the explosive force and extend up to the height of the reinforcing bar 40 which is disposed in the inner and outer steel sheets. , Explosion-proof door of the composite structure reinforced with a steel plate and fiber reinforced concrete, characterized in that a plurality of engaging members (11, 21) of the width is extended at the free end to be engaged with the concrete (51) of the filling section (50).
delete delete The method of claim 1,
The reinforcing fiber yarn 53 is explosion-proof door of a synthetic structure reinforced with steel sheet and fiber reinforced concrete, characterized in that formed from any one selected from steel fibers, nylon fibers, polypropylene fibers, PVA fibers, cellulose fibers, PET fibers.

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