Yaroslav Huk
Calculation Methods of Standard Surface Area of Flat Roofs for Internal Wasteway through Cast Iron Pipe and Funnel Set-point Diameters in the Transcarpathian Region
Uzhgorod National University
Abstract. The calculation of standard surface areas of flat roofs made by SNiP II-32-74 and DBN V.2.5-75 2013 and according to data III B and IV climatic regions excluding the results of observations of precipitation at 9 weather stations of Transcarpathian region. For the standard surface area calculation of flat roofs it is suggested using materials observations of rainfall in 1889–2014 years in at 9 weather stations of the Trans¬carpathian region with appropriate heights above the Baltic Sea: Coast – 113.0 m, Uzhhorod – 114.6 m, Big Bereznyj – 209.0 m, Hust – 166.0 m, Rachel – 438.0 m, Intermountain – 456.0 m, Lower Gate – 500.0 m, Lower Jelly – 615.0 m, Play – 1 330.0 m. To calculate rainfall parameters for settlements, peaks and bridgewalls of Carpathians it has been suggested using 23 areas between 9 weather stations and 18 transition stations for which precipitation parameters defined at least in two directions between stations and altitude rainfall efficiency. In particular, it has been calculated the rainfall parameters for the 8 peaks of Carpathian Mountain: Valley Llevel – 1 470 m, Big Top – 1 598 m, Tempe – 1 634 m, Unharyaska – 1 707 m, Syvulya, Thick – 1 818 m, Pip Ivan – 1 936 m, Petros – 2 020 m and Goverla – 2 061 m. The calculation of rainwater parameters for cast-iron water pipes and funnels has been made in four areas: Coast – Playa, Uzhgorod – Playa, Hoost – Play, V. Bereznyy – Play. For the purpose of legal practice areas of flat roofs for cast-iron pipes and funnels offered peg 13 districts of Transcarpathian region 9 weather stations.
Keywords: annual precipitation, annual precipitation and mixed rare, the absolute daily maximum precipitation, altitude, altitude, rainfall rates, funnels, flat roofs, iron spillway.
Volodymyr Mushchanov, Igor Garanzha, Anatoliy Orzhekovskiy
Calculation Methods of Standard Surface Area of Flat Roofs for Internal Wasteway through Cast Iron Pipe and Funnel Set-point Diameters in the Transcarpathian Region
Donbas National Academy of Civil Engineering and Architecture
Abstract. In this paper, we consider three different methods for calculating the probability of failure (the method of two moments, statistical tests and Monte Carlo) of the rod element. As an example, a calculation is made for a statically determinate single-span beam loaded with snow load. As initial stochastic values, the cross-sectional area, snow load and the yield point of the construction material were considered. The analysis of the obtained results of failure probability is made and recommendations are made on the applicability of the methods considered..
Keywords: probability of failure, statistical tests, two-point method, Monte Carlo method, random variable.
Andrey Alyokhin, Anton Burdel
Numerical Studies of the I-Beam Floor Beam of 4th Class of Section According to Eurocode 3
Donbas National Academy of Civil Engineering and Architecture
Abstract. In the article numerical investigations of the beam of I-beam cross-section according to Eurocode 3 have been given: «Steel structures» [1]. The I-beam section beam is produced as an element of the general 4th class, in which the loss of local stability occurs before reaching the yield point in any one or more regions of the cross-section. To ensure the load-carrying capacity of the beam, the local stability of the wall, the load-bearing capacity of the wall on the shear were checked. The load-bearing capacity of the section was checked from the combined effect of shearing force, bending moment and axial force. Based on the calculation results, the metal capacities of the beams were determined depending on the height and wall thickness, as well as the pitch of the transverse stiffeners. Based on the obtained results, the optimum thickness and height of the beam wall and the required step of the transverse stiffeners have been determined. The analysis of the obtained values has been carried out and the main factors influencing the metal intensity of the beam of the 4th class have been determined.
Keywords: beam overlap, 4 class cross-section, effective area, local stability, transverse stiffeners, yield strength, building frame, I-section.
Volodymyr Vasylev, Nataliia Kashirina, Anton Tarasenko, Konstantin Moshak
Metal-wooden trusses of building fabrication from traditional profiles
Donbas National Academy of Civil Engineering and Architecture
Abstract. The article presents an analysis of constructive solutions for metal-wood trusses and beams, offers of manufacturers, print publications, etc. Currently, in the construction of low-rise buildings, glued wooden I-beams are most often used, so as in their production it is used the materials that are processed on one traditional technological equipment of woodworking shops. Today there is an increase in the trend of construction of private housing construction facilities, pavilion type, objects of agricultural purpose and storage facility by private traders and small construction companies, which benefit from building on their own. This condition requires the development of new structural forms of load-bearing wooden structures. The prospect of using metal-wood trusses for building construction from traditional profiles has been proved. New design solutions for metal-wood trusses have been developed, taking into account the availability of the equipment and the technological capabilities of the private developer. Constructional manufacturing of trusses involves the manufacture of a structure, using materials, tools and technological processes, traditional for the construction site. The peculiarities of the VAT of the developed trusses have been analyzed, which will make it possible to select the design schemes reasonably in numerical studies.
Keywords: a metal-wood truss, a metal-wooden beam, a wooden belt, a grating from a rolling angle, a discharged grating, a triangular lattice, cylindrical nagels, a building fabrication.