Ye.M. Yermak, P.N. Kalinin
Parameters of optimal adjusting of warping resilient devices for bridge cranes
Ukranian state akademy of railway transport
Abstract. The modernizing of a running part acting of bridge cranes by warping resilient devices (stabilizers) is invoked to change power interaction of running sprockets with crane ways and is directed on raise of macrobiosis of sprockets, decrease of horizontal efforts acting on a skeleton of an industrial building. In a paper the questions of synthesis of parameters of tuning up of these stabilizers are construed.
Keywords: brige cranes of industrial buildings, brige warps, lateral forces, stabilizers, optimal tooling, programme «Stub».
V.N.Кushenko
Calculation of dynamic forces in lifting cables under calculation of building structures of mowing mine headframes
Donbas National Academy of Civil Engineering and Architecture
Abstract. The article showed the results of analysis and synthesizing of experimental and theoretical investigations of dynamic character of loads in mowing mine headframes under operational loadings in lifting cables. The engineering prinsiples of loading definition on mowing mine headframes from operational tension form lifting cables which allowed to estimate the dynamic forces from lifting mechanism oscillations were proposed.
Keywords: mine headframes, dynamic forces in lifting cables, dynamic coefficient, calculation loads.
S.F. Pichugin, A.V. Makhinko
Some questions of calculation of steel structure reliability
Poltava National Technical University named in honor of Yuri Kondratyuk
Abstract. In this article the brief review of authors researches in the field of steel structures reliability is given. Analytical probabilistic models are developed for maxima of stochastic loads and combined load effects on building structures are taken into account; recommendations for standardization of combined factors are given. Several practical methods of reliability analysis of steel structure elements are proposed. In accordance with the proposed methods the optimum level of elements reliability of steel structures is given on a class of the buildings responsibility. It is allowed to calculate the values of importance factor. All formulated and developed probabilistic methods are characterized by analytical simplicity.
Keywords: reliability of structures, stochastic loads, probabilistic models of load, probabilistic method.
O.V. Semko, A.V. Gasenko
Reliability of the compressed steel elements of channels at corrosion deterioration
Poltava National Technical University named in honour of Jury Kondratyuk
Abstract. Reliability of the centralcompressed elements of square section that consist of two channels is considered, at corrosion deterioration. It is resulted the formula that allows to estimate reliability of an element in conditions of uniform corrosion at the normal law of distribution of a random variable of initial speed of corrosion. It is considered the most important characteristics corrosion at nonuniform deterioration. It is applied the theory of extreme values to the description this corrosion.
Keywords: the compressed steel element, corrosion deterioration, reliability.
Ye.V. Horokhov, A.M.Alyochin
Mathematical problem definition about besieging of cloudy drops on wires of electronetwork systems
Donbas National Academy of Civil Engineering and Architecture
Abstract. A mathematical task about besieging of cloudy drops on the wires of the electronetwork systems is formulated in the article.
Keywords: icing, wires of the electronetwork systems, model, model terms, integral coefficient of capture, cloudy drops, ice, local coefficient of freezing.
R.I. Kinash, Y.S. Gook
Сalculation principles of wind parameters for settlements of zakarpatskiy region, carpathian peaks and passes
National University “Lviv Polytechnics, Uzhgorod National University
Abstract. The wind parameters are used under projecting of local planning, planning and erection of settlement buildings, substantiating of selection of all kinds of building operations, engineer geological, techno-ecological researches and calculations of wind loads on buildings and constructions. Wind parameters are given in SNiP 2.01.01.82 for such cities as Beregovo, Khoost and Uzhgorod according to researches till 1975. Wind parameters which are described in this article are calculated on basis of researches of 1950-2000 for 9 weather stations of Zakarpatskiy region with accordance to high altitude coefficients strategy.
Keywords: calculation of wind parameters.