Hollow slab that dissipates explosion energy

Abstract

The invention relates to a hollow sandwich slab that creates voids within standard concrete used in building construction and dissipates the explosion energy through these voids.

Description

[0001] HOLLOW SLAB THAT DISSIPATES EXPLOSION ENERGY

[0002] TECHNICAL FIELD

[0003] The invention relates to a hollow sandwich slab that creates voids within standard concrete used in building construction and dissipates the explosion energy through these voids.

[0004] PRIOR ART

[0005] The development and production of chemical substances have become easier today, making it possible to manufacture large quantities of explosives. Particularly in terrorist attacks, explosives are placed in vehicles such as cars, minibuses, or trucks, increasing the potential damage. Various methods have been developed to mitigate such damage. One approach is to build security walls at specific distances in front of structures, and another is to reinforce the fagade of the structure exposed to the explosion with armor materials or to use such materials within the structure to strengthen it.

[0006] For structures designed to withstand explosion pressure, high-strength concrete, and steel reinforcements are used to resist shear and punching forces caused by explosions. These structures use special, costly materials in both the structure and its cladding. However, due to the heavy weight and large volume of these structures, transportation and assembly issues arise. Therefore, there is a need for structures that can divert explosion energy away from the protected sections without imposing any load or causing damage, without compromising the structural integrity, and without creating transportation or assembly problems.

[0007] Companies already manufacture explosion-resistant structures, where high- strength concrete and a high amount of steel reinforcements are used. In our invention, the concrete grade used is standard concrete (C30-35), which is commonly used in building construction, making it cost-effective. Additionally, hollow sandwich slabs are lightweight, making them much easier to transport compared to products from other manufacturers. BRIEF DESCRIPTION OF THE INVENTION

[0008] The invention relates to a hollow sandwich slab that dissipates explosion energy resulting from a large number of explosives, such as those caused by vehicle explosions, before the energy reaches the section of the structure that requires protection, either by discharging the energy through the voids or by absorbing it with armor. The sandwich slab creates voids within standard concrete used in building construction, allowing the explosion energy to be discharged through these voids. As a result, with this invention, while the explosion energy is diverted away from the structure, the protected section is not subjected to any load or damage, and the structural integrity is preserved. Therefore, no extra costly manufacturing is required for the structure.

[0009] LIST OF FIGURES

[0010] Figure 1. Top View of the Hollow Slab

[0011] Figure 2. Side View of the Hollow Slab

[0012] DETAILED DESCRIPTION OF THE INVENTION

[0013] The invention involves creating lightweight and hollow sandwich slabs made of thin concrete plates. The amount of explosive used on the sandwich slab is determined based on the quantity that will not compromise the structural integrity or stability, with the explosive amounts calculated based on the voids in the sandwich slab. After detonation, the explosive first penetrates the upper plate. Then, the explosion energy is discharged from the void in approximately 1 / 10,000th of a second. During this discharge, if no damage occurs to the structural elements within the sandwich slab, this value is referred to as either limit or sub-limit pressure. The limit explosive quantity that can be withstood without causing damage to the sandwich slab's voids is determined. The ratio of explosive to slab void was defined as 1 / 10, and the pressure discharged from the sandwich slab void was measured with the first sensor, while the explosion pressure formed on the upper part of the sandwich slab was measured with the second sensor.

[0014] The thin concrete plates in our invention have a minimum width of 100 cm and a length of at least 150 cm (optimal: 200 cm). The inner wall thickness of the upper and lower parts of the hollow sandwich slab is at least 5 cm, and the thickness between the sandwich plates is at least 5 cm. The width of a single-void sandwich slab is at least 15 cm (optimal: 20 cm), and its height is at least 15 cm (optimal: 20 cm). The explosives are detonated at least 10 cm away from the sandwich slab. The values are calculated for scenarios where explosive-loaded vehicles detonate, and the connection between the explosive distance from the structure and the amount of explosive is established. Based on this, an explosive-void cross-section area graph is created (Graph 1). In Graph 1 , the distance from the structure to the explosive is defined as 2 meters (R=2m). At this distance, the hollow slab's resistance to the explosive weight is described in TNT units. For example, a slab with a cross-sectional area of 500 cm2can withstand 2000 kg of explosive at R=2m. At R=6m (where the explosive detonates 6 meters away from the structure), a hollow slab with a cross-sectional area of 200 cm2can withstand 15,000 kg (15 tons) of TNT equivalent, easily dissipating the explosion load. At 500 cm2, the slab can withstand 32,000 kg (32 tons) of explosive at a distance of 6 meters, easily dissipating the explosion load without damaging the security structure.

[0015] Explosive weight - hollow area.

[0016] Graph 1.

Claims

CLAIMS1. It is a slab that dissipates explosion energy, characterized by; opening hollows in the concrete and discharging the explosion energy from these hollows, non-forming load or damage and non-disrupting the integrity of the structure, a lightweight and hollow sandwich structure, at least 100 cm wide, at least 150 cm long, at least 15 cm high and at least 5 cm inner wall thickness.

2. It is a slab mentioned in claim 1 , characterized by; using the first sensor to measure the pressure discharging from the hollow of the hollow sandwich slab and the second sensor to measure the explosion pressure formed on the slab.

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