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

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.

A Traditional Japanese House with a Jointed Wooden Frame and Tsuchikabe Walls: the Kamogawa House in Chiba

The story behind the house built by Seyseysha in Kamogawa (Chiba) began with a couple who wanted a home where their children could grow up freely in nature. So Makoto Fukada and the Seyseysha team set to work using age-old construction methods to craft a dwelling for them in the lush outskirts of Kamogawa. These traditional techniques rest on a solid, centuries-old foundation. Builders of yore, always mindful of Japan’s climate, topography, and regional specificities, developed methods for creating homes that would be sturdy, long-lasting, and at ease in their surroundings. The resulting structures, layouts, and designs of traditional Japanese houses adopt forms attuned to what nature offers, and the Kamogawa House is no exception. With its formal integrity, the dwelling evokes the spirit of a bygone age when people and nature partook in a symbiotic harmony.

RESEARCH OF THE SETTLEMENT OF PRAGUE-KORCHAK CULTURE IN RIVNE CITY

The paper introduces into scientific circulation the results of research of the objects of Early Slavs of the Prague-Korchak culture in a multi-layered settlement in the southern part of Rivne city. The settlement is located on the eastern shore of the Basiv Kut Reservoir, on the oval hill measuring 220 Ч 120 m. The first finds of the Early Middle Ages were discovered here by V. K. Piasetskyi in 1989. In 2019, the excavations were carried out on the area of 590 m2; the housing and storage pit of the Prague-Korchak culture have been discovered. The quadrangular foundation pit of 3.5 Ч 3.5 m square was sunk into the earth to the 0.3—0.4 m from detection level. The remains of stone stove made on the wooden frame were located in the northern corner of the dwelling. Such semi-dugout dwellings with the stove in one of corners was the main type of residential buildings in the population of the Prague-Korchak culture. The pillar holes found in the corners of the foundation pit and in the middle of the walls indicate the frame-pillar construction of the wooden walls. Among the stones from the destroyed stove and on the earthen floor in the central part of the foundation pit of the dwelling the remains of nine clay pots were found. We managed to reconstruct the full profiles of seven of them; two else vessels are represented by the profiles of the upper parts. The pots from the dwelling have a conical body, weakly marked shoulder, scarcely marked neck and short rim. The surface of the item is insufficiently smoothed and bumpy. The admixtures in the clay are mostly of small and medium size, with added fireclay, grus and sand. By their size the vessels are divided into small (1), medium (5) and large (3). All pots from the dwelling belong to variants 1—3 of the first type according to I. P. Rusanova’s classification. This combination is typical of the early monuments of the Prague-Korchak culture. The analysis allows attributing the ceramic complex from Rivne to phaze 1 according to I. O. Havritukhin and to date it as belonging to the second half of 5th — mid-6th centuries. The settlement was not large; two or three farmsteads could simultaneously exist there. They were located at a distance of 100—150 m from each other.

Design Optimization of Bullock Cart Yoke

Since from ancient times weight of bullock cart is concentrated on the neck of the bullock reducing its efficiency. This paper presents various design of the yoke structure for the cart and its analysis whose aim is to reduce the stress acting on the single point i.e. on the neck of the bullock. The stress needs to be distributed over the entire body of the bullock instead of concentrating only on the neck. This paper gives an idea of how the stress is distributed on the bullock and the deflection of the yoke corresponding to the load. The design iterative process is based on the presently used bullock cart yoke structure. This paper also includes the design concepts which provide cushioning at the contact of the wooden frame to the bullock. The best design is then selected based on the structural behaviour for particular boundary and loading conditions. The modelling is done in SOLIDWORKS 2017 software and simulated/analysed using ANSYS 18.2 software.

Materials and technologies to achieve better energy efficiency of buildings

The article will discuss the aspects of the possibilities of improving the energy efficiency of buildings. In particular, the author will analyze innovative technologies in the field of improving the thermal insulation of external partitions and improving the efficiency of underfloor heating. The author will present the results of research on the thermal properties of metal and wooden frame structures, as well as innovative veneer floor panels. Frame structures are increasingly used in single-family housing, and veneer floor panels are used in underfloor heating. Innovative solutions of building partitions are to improve the energy efficiency of newly constructed buildings, and thus reduce the emission of greenhouse gases into the atmosphere.

Identification of application of biological architecture in the South Nias’s traditional House in Indonesia

Nias Selatan is located in the west of the island of Sumatra, Indonesia, has a unique traditional house in the form of a stilt house with a sloping roof, and a wooden frame construction where all the building materials are made of biological materials, obtained from the natural surroundings. Buildings are strongly influenced by the environment and its inhabitants, which are in harmony with the principles of biological architecture. This study aims to identify the application of biological architecture in South Nias traditional houses. The research method used is qualitative content analysis, namely research methods with in-depth conceptual integration. The environment (climate, location, vegetation, land and water) and people / inhabitants (basic human needs, culture, beliefs / religions, and livelihoods) are important indicators as well as factors causing the birth of the traditional house of South Nias. These factors will be analyzed to determine the impact (architectural design, materials, construction) on the building. From the research results, it can be concluded that the traditional houses of South Nias apply biological architecture that reflects the genius locus of their ancestors.

Experiment and Numerical Simulation of Wooden Door Frame

To prevent the wooden door frame of traditional rural houses from being stuck due to diamond deformation under earthquake and improve the seismic capacity of rural houses, an innovative method of reinforcing the angular displacement of the wooden door frame with channel steel and the diagonal brace is proposed. The rationality of the finite element simulation is demonstrated by comparing the results of finite element simulation and quasistatic test based on reinforced and unreinforced wooden door frame specimens. On the basis of the finite element model of wooden door frame, the seismic performance of channel type and diagonal brace thickness of reinforced wooden door frame and the seismic performance of friction coefficient of unreinforced wooden door frame are studied, respectively. The results show that the lateral stiffness and the lateral bearing capacity of the reinforced wooden door frame increase with the increase of channel steel type and the diagonal brace thickness. The height of the channel steel section of the seismic reinforcement structure should be half of the unreinforced structure. With the increase of the friction coefficient, the lateral bearing capacity of the unreinforced wooden frame increases, while the ductility of the unreinforced wooden frame decreases.