Solution of Bullet Proof Wooden Frame Construction Panel with a Built-In Air Duct

Abstract

The growing terrorism threats across the world play an important role in the design of civil buildings and living areas. The safety of personnel is a top priority in unclassified buildings, especially military buildings. However indoor air quality and thermal comfort has a direct impact on personal productivity and ability to concentrate on duties and affect the decision making in stress conditions. The use of wooden structures is becoming more common in the building construction, and application of wooden frame structures for the construction of new buildings as well as for retrofitting the existing buildings. Prefabricated wooded frame construction perfectly fits need of unclassified buildings, allowing significant reduction of construction time and integration of various active and passive elements, such as a fresh air supply duct. Within the scope of this paper a 12 mm thick ballistic panel made of aramid was tested. Ballistic panel, thermal conductivity, and fire resistance of wooded construction panel with embedded air duct were analyzed for the various modelled exterior wall solutions. The main advantage of the proposed technology is fast and qualitative modular construction of unclassified buildings, providing all modern requirements not only for safety, but also for the energy efficiency and indoor air quality. It was found that bullet proof aramid panels do not reduce overall fire safety in comparison to traditional construction materials. However embedded outdoor air supply ducts significantly reduces construction heat transfer coefficient.

Plywood Panel with UHMW Polyethylene Board Ballistic Resistance

“…The next experiment would be varying the thicknesses of the plywood and UHMWPE boards (notably, the thickness of plywood could likely be reduced in tests 2_1 and 2_2) to make sure the min- imal possible thickness is used for the maximum lightness of the wall, as well as in combination with other ballistic materials, like aramid fiberboard (Borodinecs et al, 2022).…”

“…Regardless of life expectancy, a unique parameter in the construction of all military facilities is the specifications related to the building's force protection -the structure's inherent ability to provide safety and security and customary conditions to the occupants and equipment inside. (Borodinecs et al, 2019(Borodinecs et al, , 2022Sanborn, 2018) Therefore, for relatively impact fragile civil buildings, wall reinforcement is significant. Traditional explosion-proof walls usually use high-strength concrete or are equipped with many steel bars to achieve wall reinforcement.…”

“…Applying prefabricated building modules significantly reduces on-site installation time and allows correct material specification and energy simulation due to precise measurements. (Borodinecs et al, 2017(Borodinecs et al, , 2019(Borodinecs et al, , 2020(Borodinecs et al, , 2022 The performance of UHMWPE in combination with plywood has not been investigated so far. The authors tested plywood for ballistic resistance (Barone et al, 2022).…”

Characteristics and Mechanism of Fire Spread between Full-Scale Wooden Houses from Internal Fires

“…Therefore, the main factors influencing fire spread need to be analyzed by actual fire tests [33,34]. Traditionally, fire spread tests have been based on small-sized models of wooden structures [35,36]. Although these studies have provided a basic theoretical understanding of the fire spread phenomenon, they focused less on wind speed and space temperature; therefore, their results were not completely realistic [37,38].…”

Influence of Internal Gas Pipelines Built into the Structure on the Safety of Residents and Energy Eficiency Factors of the Building

“…As it is described in Section 3, internal pipelines are hidden inside construction elements that create a barrier for leakage early detection. This problem can also be relevant for builtin HVAC system, for example, the use of panels with a built-in air duct in construction [3]. The authors believe that construction regulatory bodies shall consider these cases of internal gas pipeline installation.…”