75504 2712-8172 Magazine of Civil Engineering 4 39 2013 1-127
RAR RUS 3-11 Peter the Great St. Petersburg Polytechnic University Bukhartsev Vladimir gts.bu@cef.spbstu.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great Saint Petersburg Polytechnic University Volkov Evgeniy volkov.e.n@gmail.com
Polytechnicheskay, 29
 Influence of discontinuities on the rock mass stress-strain state around excavation Adequate mathematical modeling of selvage zone and natural fracturing as well as assessment of its impact on stress-strain state – urgent problems in calculation of hydraulic tunnels. Modern Russian regulations in fact give dependences only to solve the problems in plane deformation conditions. The specificity of work of the tunnel that crosses the discontinuity, as a space frame are not taken into account. This article presents influence of discontinuities and fracture characteristics on the rock mass stress-strain state around excavation. Fractured rock mass model was analyzed. Formula of modulus of elasticity for fractured rock mass at distance from the fault was deduced. Influence of discontinuities on the stress distribution was estimated with using experiment design method. On the basis of the conducted research it was established, that assessing rock stress-strain state around the fracture is necessary to consider rock mass fracture characteristics; and using principal stresses distribution in combination with Lode parameter we can clearly estimate the type of stress-strain state in each point, therefore, we can use different strength theories for different sections of the tunnel. 10.5862/MCE.39.1 stress-strain state tunnel discontinuities rock fracturing principal stresses Lode parameter https://engstroy.spbstu.ru/article/2013.39.1/ 01.pdf
RAR RUS 12-21 Vologda State University Utkin Vladimir UtkinVoGTU@mail.ru
Vologda, Russia
 Vologda State Technical University Shepelina Elena lenashepelina12@mail.ru Calculation of reliability of foundation bed in the deformations at the operational stage Russian standards recommend using certain probabilistic-statistical methods as methods of calculation of reliability of structures and bases at the operational stage. However such methods can be applied only when there is total statistical information about monitored parameters of computable models. In practice, at the operational stage, such information is often not complete and consequently probabilistic-statistical methods for foundation bed can not be used. The methods for calculating the reliability of foundation bed of buildings and structures on the operational stage with limited (incomplete) statistical information on the monitored parameters of computable models by the strength criteria and the following notes on the calculation of the reliability of the base by the deformation criteria are given in the article. There are two ways of calculations of reliability regarding to the real conditions of collecting information on the monitored parameters. The first method features description of the functions of random variables distribution capabilities, and in the second method the random variables (parameters) are described by distribution functions obtained from the Chebyshev’s inequality. 10.5862/MCE.39.2 reliability foundation bed operational stage strength of the ground pressure on the ground limited information monitored parameters https://engstroy.spbstu.ru/article/2013.39.2/ 02.pdf
RAR RUS 22-34 Siberian State Automobile And Highway Academy Aleksandrov Anatoliy Aleksandrov00@mail.ru
Omsk, Russia
 Plastic deformation of the granodiorite gravel and sand-gravel mixtures when exposed to cyclic triaxial load This article gives an overview and analysis of models of plastic deformation of soils and granular materials. It was found that the most frequently used functions are power, logarithmic and exponential, connecting the plastic deformation with the deformation of the first effect of the load or with deformation, accumulated over a certain relatively small number of load applications. Using the theory of hereditary creep generalizing models for calculating the plastic deformation of the cyclic loading were obtained. The proposed method of calculating the residual deformations of granular materials by cyclic loading is integrating the power functions describing the increment of plastic strain. By analyzing the experimental data on the dependence of the residual strain on the number of loads, the maximum and minimum stresses the coefficients of these equations were obtained. The comparison of the calculation results with the experimental data obtained in triaxial test of sand-gravel mixture and granodiorite gravel is presented. 10.5862/MCE.39.3 plastic deformation of granular materials triaxial test RLT test granodiorite granodiorite gravel https://engstroy.spbstu.ru/article/2013.39.3/ 03.pdf
RAR RUS 35-45 Siberian State Automobile And Highway Academy Kalinin Alexsandr a1exsandr55ne@mail.ru
Omsk, Russia
 Application of modified yield criteria for calculation of safe pressures on the subgrade soil The article deals with design the road constructions by ensuring the shear resistance of the subgrade soil and pavement layers made of weakly cohesive materials. The analysis of Mohr–Coulomb plasticity criterion was performed and it was found, that in case of a limiting condition state by this criterion pavement smoothness goes out of the limits regulated by normative documents. On the basis of analysis of Drucker-–Prager yield criterion there were obtained formulas connecting ultimate strength uniaxial compression and tension with the parameters of MohrCoulomb failure envelope. Substitution of these expressions into the original criteria for the strength of materials, that are continuums, allowed modifying certain conditions so that the tensile strength changed the angle of internal friction and cohesion. A number of dependencies for calculating safe pressure on discrete material of half-space is obtained from the modified conditions of plasticity. Comparison of the numerical results to experimental data allowed determining the most suitable formula for the design of road constructions. 10.5862/MCE.39.4 yield criteria principal stresses safe pressure https://engstroy.spbstu.ru/article/2013.39.4/ 04.pdf
RAR RUS 46-50 Peter the Great St. Petersburg Polytechnic University Sokolov Vladimir sva0808@rambler.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Strakhov Dmitry sdaleks2008@rambler.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Sinyakov Leonid
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Design of tower type structures to dynamic effects taking into account flexibility of the pile foundation and the base The necessity to take into account flexibility of pile foundation in design of such structures as towers for mobile communication or radio equipment especially under dynamic loads (seismic, fluctuating component of wind load and the resonant vortex excitation) has been considered. The specific features of modeling of pile ductility, using program complex SCAD, were discussed and examples of corresponding calculations are given. The influence of pile parameters on internal forces and deflections of structure were also discussed. It was found, that for screw piles in the calculation results are mostly influenced by diameter of the broadening; the influence of trunk diameter of piles is considerably less. The effect of trunk pile diameter is much more important for piles without the broadening than for screw piles. It was also found that in most cases the effect of pile ductility in the vertical direction is much more significant than in horizontal. 10.5862/MCE.39.5 tower type structures pile foundation base flexibility of piles dynamic effects https://engstroy.spbstu.ru/article/2013.39.5/ 05.pdf
RAR RUS 51-59 South Russian State Technical University (Novocherkassk Polytechnic Institute) Kasharin Denis dendvk1@mail.ru University of Transport and Communications Thai Thi Kim Chi chittk@utc.edu.vn
3, Cau Giay, Lang Thuong, Dong Da, Ha Noi, Vietnam
 Increasing stability of flexible dam-foundations in engineering protection of buildings from flooding This article is about the calculation of flexible dam structures used for protection of populated areas from flooding, which is actual problem because of the climate changes and inadequate conditions of existing river dykes, which frequently do not satisfy ecological requirements in Russian Federation. Issue of shape calculation of water-filled membranes is considered, depending on internal pressures and external forces. Stability of water-filled membranes under hydrostatic pressure and uplift forces is analyzed. Explanations and requirements for creating new structures of flexible dams are given; they satisfy requirements for ecological infrastructure and provide reliability in terms of construction on biogenic soils and in crowded urban places. Designed structures are biopositive and can be erected without using massive equipment in emergency conditions. 10.5862/MCE.39.6 foundation stability engineering protection flexible dams flooding protection biopositive structures https://engstroy.spbstu.ru/article/2013.39.6/ 06.pdf
RAR RUS 60-69 56825663400 0000-0003-4172-7591 “B.E. Vedeneev VNIIG”, JSC Shipilov Alexander a.shipilov@yahoo.com
St. Petersburg, Russia
 Peter the Great Saint Petersburg Polytechnic University Lavrov Nikolai n.lavrov@inbox.ru
Polytechnicheskay, 29
 Kyrgyz-Russian Slavic University Loginov G. Discharge capacity of sluiceway channel of water intake structure for diversion power plant in winter The paper presents results of research hydraulic processes at the intake structures of diversion power plants in winter. On the basis of the physical modeling results the flow characteristics of sluiceway channel of water intake on the river Issyk-Ata, Kyrgyzstan were determined. Statistical models of discharges of elements of sluiceway channel with their mutual influence were obtained, using the methods of experimental design and data analysis. The influence of the concentration of brash ice on the sluiceway channel and its elements is described. The comparison of experimental data with data obtained by other authors before is made by comparing flow coefficients. Recommendations for normal operation of ice pass at sluiceway track channel of water intake structure for diversion power plant are given. 10.5862/MCE.39.7 water intake structure sluiceway channel physical modeling brash ice winter water withdrawa https://engstroy.spbstu.ru/article/2013.39.7/ 07.pdf
RAR RUS 70-82 “B.E. Vedeneev VNIIG” JSC Ivanov Timofey ivanovts@vniig.ru “B.E. Vedeneev VNIIG” JSC Badenko Nikolay badenkonv@vniig.ru JSC “B.E. Vedeneev VNIIG” Oleshko Vyacheslav vyacheslavoleshko@gmail.com Geoinformation methods of identifying locations for prospective HPP Currently large-scale studies of water-power potential of minor and mean rivers are being conducted to identify location of prospective hydropower plants and estimate their manufacture and economic efficiency. Because of tight schedule, large study area and large number of criteria involved in choosing prospective hydropower plants, it is necessary to use modern methods and technologies to solve the problem. This paper reviews the methodology that allows performing multi-criteria analysis to find locations on plain rivers suitable for hydropower development. All estimations were performed using geographic information systems (GIS). Traditional way to find location for prospective hydropower plants consists in comparing several variants of location for hydropower development and several marks of normal pond level. Unlike traditional method, developed methodology and GIS-based tools allow analyzing large number of locations and considerably automating calculations. 10.5862/MCE.39.8 geographic information systems (GIS) multi-criteria analysis hydropower plant (HPP) prospective HPP decision-making https://engstroy.spbstu.ru/article/2013.39.8/ 08.pdf
RAR RUS 83-93 Peter the Great Saint Petersburg Polytechnic University Mikhalev Mikhail mikhalev@cef.spbstu.ru
Polytechnicheskay, 29
 Calculating the main canals In the proposed method hydraulic design of the main canal is combined with the selection of optimal solution. As a goal function it was accepted the dependence, minimizing the amount of excavation and concrete works on the establishing the canal. The optimization parameter is a slope of the canal bottom with a uniform motion of the water in it. The paper considers canals, lined within the wetted perimeter by concrete and by coarse-grained non-cohesive soils, and unlined canals without facing. In the process of calculation all hydraulic parameters of the canal are changing, except for the relative width of the canal along the bottom and ratio of slope gradient above and below the shore line. The dependence of the optimal amount of works in non-cohesive soils on the defined parameters of the canal was analyzed. The effect of the limiting the flow rate of water in the canal by the noneroding velocity value on the optimal technical decision was investigated. 10.5862/MCE.39.9 main canal; hydraulic calculation optimal solution goal function parameter optimization optimal slope flow rate hydraulic radius cladding within the wetted perimeter noneroding velocity https://engstroy.spbstu.ru/article/2013.39.9/ 09.pdf
RAR RUS 94-105 S-1676-2017 6507460407 0000-0002-8907-7869 Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Mirsaidov Mirziyod theormir@mail.ru
39, Kori Niyoziy St., Tashkent, Uzbekistan, 100000
 55586710000 0000-0002-6498-5043 Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Sultanov Takhirjon tz-sultanov@mail.ru
Tashkent, Republic of Uzbekistan
 Institute of Mechanics and Seismic Stability of Building Rumi D. An assessment of dynamic behavior of the system "structure – foundation" with account of wave removal of energy Detailed review of the problem of wave removal of energy through the border of finite area of a foundation is given in the paper. Variation statement, methods and algorithms of solution of different dynamic problems for viscous-elastic system with account of non-reflective conditions on the border of finite foundation are given. The possibility to use non-reflective conditions is shown in tests problems. Dynamic behavior of heterogeneous viscous-elastic system ”dam – foundation” is studied under short-time intensive load subjected to the foundation. Weak dependence of energy dissipation in a system with hereditary viscous-elastic properties of material on the frequency of natural oscillations, as well as dependence of wave removal of energy on principal natural frequencies of system oscillations are revealed. In investigation of steady forced oscillations, the possibility of application of finite region of foundation is shown when non-reflective conditions are absent on the border and in exclusive cases only, when the frequency of external effect differs from artificial natural oscillations of discussed finite region; whereas the presence of non-reflective conditions on the border of finite region permits to avoid artificial resonance, unavailable in reality. 10.5862/MCE.39.10 dam foundation dynamic behavior non-reflective conditions wave removal of energy viscous elasticity https://engstroy.spbstu.ru/article/2013.39.10/ 10.pdf