75504 2712-8172 Magazine of Civil Engineering 5 57 2015 1-117
RAR RUS 3-19 7004066045 0000-0001-7723-6052 Institute Environmental Radioactivity, Fukushima University Zheleznyak Mark zheleznyak.m@gmail.com 6602848417 0000-0002-0587-4722 National Research Moscow State Civil Engineering University Kantardgi Izmail kantardgi@yandex.ru Institute of Mathematical Machine and System Problems Sorokin Maksim maxim.sorockin@gmail.com Moscow State Civil Engineering University Polyakov Aleksey ap.gts@yandex.ru Resonance properties of seaport water areas The article discusses the modern methods of determining the mode of low-frequency oscillations in a port causing harbor oscillations, using as an example the dry cargo area of the Taman seaport and the Gelendzhik seaport that are currently under design. These ports were scanned for risk of harbor oscillation occurrence through an existing regulatory procedure which uses significant simplifications. In order to obtain the resonance characteristics of the port areas, low-frequency wave processes in the port were calculated using the SWASH spectral model. As a result, the resonance properties of various port areas important for port design have been obtained. In this case, white noise was modeled at port entrance, and the gains of the spectral components at critical frequencies were found. It has been shown that the suggested approach allows to obtain the resonance frequencies of the designed harbor. Further development of this approach may result in obtaining the resonance energies as well. 10.5862/MCE.57.1 seaport port water areas low frequency oscillations resonance properties harbor oscillations https://engstroy.spbstu.ru/article/2015.57.1/ 01.pdf
RAR RUS 20-33 6506150284 0000-0003-1139-3164 Moscow State University of Civil Engineering (National Research University) Sainov Mikhail mp_sainov@mail.ru
Moscow, Russia
 3D performance of a seepage control wall in dam and foundation This article analyzes the results of numerical modeling of the stress-strain state (SSS) of a grout curtain carried out by the cut-off wall method in the dam foundation and body of the Yumaguza hydroelectric complex. On the river channel section the wall cuts through not only the riverbed deposits, but also the lower part of the dam. On the right-bank section the wall cuts through only the upper part of a very thick layer of clay soils. The numerical model parameters of the structure and the foundation were selected in a way allowing to obtain approximate conformance of field and calculation data on the settlements of the gallery located beneath the wall. It was revealed during model calibration that the uplift of the gallery recorded from the field data is related to the reservoir filling. At the rise of the groundwater level a part of the soil mass in the dam foundation and body passes into a suspended state. The main type of wall deformations was presented by deformations due to vertical compression from settlements of the surrounding soil. These deformations result in the concentration of compressive stresses in the wall. The non-uniform distribution of settlements along the dam site causes bending deformations in the wall plane. This longitudinal bend results in small tensile stresses appearing in the wall in the direction along the dam site. However, on the whole, the wall SSS is rather good because it is compressed from all sides. Bending deformations of the wall due to its bend are negligible. 10.5862/MCE.57.2 cut-off wall stress-strain state numerical modeling Yumaguza hydroelectric complex field data settlements bend https://engstroy.spbstu.ru/article/2015.57.2/ 02.pdf
RAR RUS 34-44 7102546144 0000-0001-7651-1534 Moscow Automobile and Road Construction State Technical University Kirillov Andrey kirill806@gmail.com
Sochi, Russia
 56503963100 Lomonosov Moscow State University Zavyalov Mikhail zavyalov.m.a@gmail.com Modeling of energy dissipation processes in a pavement – vehicle system The law of conservation of energy for a ‘pavement – vehicle’ system manifests itself primarily in the fact that for any temperature and operating conditions of a road asphalt concrete pavement the potential energy of gravity and the kinetic energy of a vehicle are partially transformed upon contact with the road pavement into elastic deformation energy or thermal energy, while a part of the energy dissipates. These types of energy are to some extent transformed into the internal energy of the road pavement, altering its energy balance and causing destructive processes. The initial level of the internal pavement energy changes while the road is used, on the one hand, through regular contributions from vehicles and from solar raditation, and, on the other hand, from compensating for viscoelastic deformation. Understanding these changes will allow to develop new and more efficient methods for monitoring the pavement condition, as well as a scientifically valid system of scheduling the repairs. In this article, we have assessed the level and the significance of the contribution of the work done by the moving vehicles over the pavement, and of the thermal radiation to the internal pavement energy gain. We have constructed a physical and mathematical model of energy dissipation and storage in the ‘pavement – vehicle’ system accounting for viscoelastic deformation and thermal radiation. We have designed an algorithm allowing to determine a scientifically based repair interval for asphalt concrete pavement. It is shown that the maximum plasticity for some ranges of speeds and transport weights may serve as a criterion of the recommended operating conditions of the road. 10.5862/MCE.57.3 asphalt pavement energy dissipation vehicle power parameters viscoelasticity specific heat capacity deformation https://engstroy.spbstu.ru/article/2015.57.3/ 03.pdf
RAR RUS 45-57 Siberian State Automobile And Highway Academy Gercog Vitaliy vitgerc@bk.ru Siberian State Automobile And Highway Academy Dolgikh Gennadiy gennadiy1987_87@mail.ru
Omsk, Russia
 Siberian State Automobile And Highway Academy Kuzin Nikolay vitgerc@bk.ru Calculation criteria for road pavement evenness. Part 1: substantiating the flatness standards of asphalt concrete pavement This article gives an overview and analysis of the works aimed at finding empirical dependencies linking the indicators of longitudinal and transverse evenness with the parameters of the deformability of road constructions and its individual elements. We list the data of field experiments and laboratory studies of triaxial deformation of materials by a repeatedly applied load. The methods of calculating the deformation based on rheological models, including the theory of hereditary creep, have been analyzed. The results of studies substantiating the acceptable and the critical individual irregularities formed in the longitudinal and transverse directions are discussed. A new method of calculating the acceptable depth of irregularities, allowing for the characteristics of the vehicle, including the time of contact interaction between the wheel and the pavement that depends on the speed of the vehicle, has been suggested. The proposed method of calculating the critical values of irregularities ensures the required level of consumer characteristics (i.e. speed and traffic safety) over the whole lifetime of the road structure. 10.5862/MCE.57.4 evenness depth of unevenness rut depth; the time of contact mutually interacting tire and coatings https://engstroy.spbstu.ru/article/2015.57.4/ 04.pdf
RAR RUS 58-65 H-9967-2013 16412815600 0000-0002-8588-3871 National Research University "Moscow Power Engineering Institute" Kirsanov Mikhail mpei2004@yandex.ru
14, Krasnokazarmennaya, 111250 Moscow, Russia
 Analysis of the deflection of a strut-type lattice girder truss The analytical dependence of the deflection of a statically determinate plane elastic truss with a uniform loading of the upper zone has been found. Forces in rods were determined using the joint isolation method. A system of equilibrium equations has been compiled in matrix form. Midspan deflection has been calculated based on the Maxwell-Mohr formula. All character conversion has been executed in the Maple computer algebra system. The method of induction on the number of panels in the truss was used. Recurrent equations for general members of the sequences of coefficients were obtained and solved using the genfunc operators package from the Maple system. The dependencies of the forces in the rods of the truss and of its deflection on the number of panels are non-monotonic, which is generally characteristic of lattice struts. We have also shown that for an odd number of panels the truss is instantaneously variable. The distribution of possible nodal velocities is given for this case. 10.5862/MCE.57.5 truss deflection kinematic variability induction method exact solution Maple https://engstroy.spbstu.ru/article/2015.57.5/ 05.pdf
RAR RUS 66-73 "Raduga" State Engineering Design Bureau JSC named after A.Y. Bereznyak Tinkov Dmitriy dvtinkov@yandex.ru
Dubna, Russia
 Comparative analysis of analytical solutions to the problem of truss structure deflection We have found new exact analytical expressions of the deflection of various plane truss structures and analyzed the existing ones. Truss deflections have been calculated by the Maxwell-Mohr formula assuming the elastic behavior of the truss elements using the method of induction on the number of panels. We have carried out a comparative analysis with known solutions and studied the quantitative and qualitative features of solutions. Characteristic features and limits on the number of panels have been identified. The studies have been carried out with the support of the Maple computer mathematics system in symbolic form. We used the Lira multifunctional software package aimed at designing and calculating civil and engineering structures for comparing the solutions and testing them. 10.5862/MCE.57.6 plane trusses deflection analytical solution induction Maple Lira https://engstroy.spbstu.ru/article/2015.57.6/ 06.pdf
RAR RUS 74-85 Peter the Great Saint Petersburg Polytechnic University Sinelnikov Aleksey alexey_sinelnikov@mail.ru
Polytechnicheskay, 29
 Reticular-stretched thermoprofile: a numerical and analytical study There are certain advantages to utilizing thin-walled cold-formed profiles in construction, as their use enables construction in all weather conditions, and allows to achieve better assemblage accuracy and to reduce costs. Thermoprofiles have slots in webs that decrease thermal flow through the web, but have a negative effect on the strength of the profiles. The reticular-stretched thermoprofile is the new type of thin-walled perforated profile. Studies undertaken by the authors have revealed that no analytical research of the profile has been carried out yet. Numerical analysis allowed to obtain the values of critical compressed loads for reticular-stretched thermoprofiles with different parameters. Reduction coefficients were calculated for strength analysis in accordance with Eurocode 3 and Ayrumyan’s manual. 10.5862/MCE.57.7 thin-walled cold-formed profile strength finite-element method Eurocode effective cross-section https://engstroy.spbstu.ru/article/2015.57.7/ 07.pdf
RAR RUS 86-96 Riga Technical University Hirkovskis Arturs arturs.hirkovskis@rtu.lv Riga Technical University Goremikins Vadims goremikins@gmail.com H-5843-2013 57205122537 0000-0002-8367-7927 Riga Technical University Pakrastins Leonids leonids.pakrastins@rtu.lv M-6585-2013 6508103761 0000-0002-1196-8004 Peter the Great Saint Petersburg Polytechnic University Vatin Nikolai vatin@mail.ru
Polytechnicheskay, 29
 6508223358 Riga Technical University Serdjuks Dmitrijs Dmitrijs.Serdjuks@rtu.lv
1 Kalku Street, Riga LV-1658, Latvia
 Behaviour analysis of load-bearing aluminium members Aluminium is one of the traditional structural materials. Structures made of aluminium alloys are widely used in the civil engineering for erection of new civil and industrial buildings and reconstruction of the existing ones. Increased corrosion resistance, stability of mechanical properties at negative temperatures, lightness and increased durability are the main advantages of aluminium alloys as the structural materials. Design approaches described in  EN 1999  and SNiP 2.03.06-85 for the aluminium elements, subjected to bending and combined bending and compression, were compared analytically and on the base of laboratorial experiment for the simple beams with the rectangular hollow cross-sections with the heights 65, 85 and 105 mm loaded by the two concentrated forces. It was stated, that the difference between the results is within the limits from 5.82 % to 12.92 %. The differences between the experimental and numerical results are within the limits from 3 % to 7 % for both methods. Rational values of height of the transversal arch, amount of the arch’s segments and a spacing of transversal arches of load-bearing framework for spacious exterior structure were determined by the response surface method for the structure with the span equal to 9 m. It was shown, that the rational height of the transversal arch and amount of the arch’s segments changes from 1.76 to 1.94 m and from 10.70 to 11.97 m, correspondingly. The corresponding minimum materials consumptions were equal to 6.16, 5.38 and 5.54 kg/m2. 10.5862/MCE.57.8 rational parameters spacious aluminum structure response surface method https://engstroy.spbstu.ru/article/2015.57.8/ 08.pdf