33407 2304-6295 Construction of Unique Buildings and Structures 4 67 2018 1-94
RAR RUS 7-18 Peter the Great St. Petersburg Polytechnic University Bushmanova Aleksandra nicealexa@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Semenov Kirill kvsemenov@bk.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Korovina Victoria vika9696@inbox.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Winter concreting of floor slabs The article deals with the analysis of modern methods and technologies of concreting of monolithic structures and research of the development of concrete strength in reinforced concrete floor slab during the building period in wintertime. In view of climatic conditions on the Russian territory, the problem of development of concrete strength during the building period in wintertime are particularly topical. The article examines the nonsteady temperature fields in concreting section under different ambient temperature, thickness of thermal insulation on the top face of concreting section and electric heating mode on lower face during winter concreting. The article authors determined that it is impossible to provide the optimal temperature of the concrete mixture to gain in critical strength without special job practice. Simulation the development of concrete strength in the program allows you to get the most complete picture of temperature fields, to make a quick selection of the optimal parameters of concreting. 10.18720/CUBS.67.1 69 winter concreting heating wire temperature field development of strength reinforced concrete structures construction period https://unistroy.spbstu.ru/article/2018.67.1/ 1_67.pdf
RAR RUS 19-31 57226357829 0000-0003-3166-1576 Peter the Great St. Petersburg Polytechnic University Dmitriev Andrei Nikolaevich dmitriefan@outlook.com
St. Petersburg, Russian Federation
 Ufa State Petroleum Technological University Semenov Alexander asfugntu@yandex.ru
1, Kosmonavtov St., Ufa, Russia
 AAH-3368-2019 56091980300 0000-0003-3850-424X Peter the Great St. Petersburg Polytechnic University Lalin Vladimir Vladimirovich vllalin@yandex.ru
St. Petersburg, Russian Federation
 Stability of the equilibrium of elastic arches with a deformed axis The paper presents the results of theoretical, numerical and experimental researches of the stability of the equilibrium of metallic arches working in the elastic stage. A review of the literature on the stability of arches equilibrium is presented. The full-scale tests of three samples were performed under the action of various loading options before the onset of the critical state. The results are processed and compared with the values of the critical loads obtained in the analytical and numerical solutions of problems. A method for determining the critical load in SCAD Office 21.1 is proposed, taking into account the geometrically nonlinearity and bending moments in the form of a series of linear calculations. Satisfactory convergence of the obtained values is established (the error does not exceed 9%). 10.18720/CUBS.67.2 69 metal arch stability analytical solution experiment numerical solution critical load deformed scheme SCAD https://unistroy.spbstu.ru/article/2018.67.2/ 2_67.pdf
RAR RUS 32-51 15730895100 0000-0003-3251-3356 Saint Petersburg State University of Industrial Technologies and Design Gorshkov Alexander Sergeevich alsgor@yandex.ru
St. Petersburg, Russian Federation
 57190865804 0000-0002-8136-3246 Peter the Great St. Petersburg Polytechnic University Olshevskiy Vyacheslav Ianushevich 79119199526@yandex.ru
St. Petersburg, Russian Federation
 Limited liability company "AlgoritmStroy" GorshkovRostislav Rostislav rostalsgor@gmail.com
22, Bryusovskaya St., St. Petersburg, Russia, 195251
 Peter the Great St. Petersburg Polytechnic University Kovredov Aleksandr 1kovredov@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 The impact of the extent of mortar filling of brick holes on thermal conductivity of masonry The paper presents a method of calculation the thermal conductivity of perforated ceramic bricks and masonry made of them. The authors calculate the thermal resistance and average thermal conductivity of the facing stone layer with a thickness of 120 mm. Filling holes with mortar leads to an increase in the thermal conductivity of ceramic products and deterioration of their thermal insulation characteristics. The average values of thermal conductivity of face ceramics products and the masonry at different extents of filling of the holes of the mortar are obtained. In case of full filling the holes the thermal conductivity of masonry from perforated bricks becomes comparable with the thermal conductivity of masonry from bricks. In view of this operational thermal conductivity of masonry from perforated facing bricks is higher than the declared value. This fact should be taken into consideration for designing of the facing stone layer from ceramic perforated brick. 10.18720/CUBS.67.3 693.22 ceramics brick mortar masonry wall thermal conductivity thermal resistance energy saving energy efficiency https://unistroy.spbstu.ru/article/2018.67.3/ 3_67.pdf
RAR RUS 52-61 Peter the Great Saint Petersburg Polytechnic University Makarov Alexey almak17@yandex.ru
Polytechnicheskay, 29
 Peter the Great Saint Petersburg Polytechnic University Morina Elena lenusik_ya_ne@mail.ru
Polytechnicheskay, 29
 Peter the Great St. Petersburg Polytechnic University Martynov Gleb martynovgleb@rambler.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Monastyreva Daria 12dm02@rambler.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great Saint Petersburg Polytechnic University Sherstobitova Polina polya-sherstobitova@yandex.ru
Polytechnicheskay, 29
 Peter the Great Saint Petersburg Polytechnic University Begich Yasmin yasmin1010@yandex.ru
Polytechnicheskay, 29
 Peter the Great St. Petersburg Polytechnic University Morina Anna anuta_yaya_ne_@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Elastic and strength characteristics of masonry meshes The walls of brick are considered to be one of the strongest structures, however, they can also collapse. The cause of masonry damage can be both operational and constructive. It is necessary to think about the strength and durability of the structure at the stage of erection. So, to avoid the destruction of brickwork, including the formation of cracks, as well as significantly and extend the life of the masonry allows its reinforcement. The article considers the method of increasing the strength of brickwork by reinforcing it with grids from various materials, and effectiveness of their application was analyzed. In the course of the work, the elements of steel, glass and basalt-plastic grids were tested for tensile stress, calculations were carried out, elastic and strength characteristics of the samples were obtained, and conclusions about the effectiveness of reinforcing brickwork with various materials were drawn. On the basis of the results obtained, a comparative analysis was carried out, advantages and disadvantages of using composite or steel masonry nets were revealed. Also, the performance and cost-effectiveness of the application of these materials was determined. 10.18720/CUBS.67.4 691.618.92 brickwork reinforcement of structures coil mesh composite materials steel net composite mesh innovations in construction https://unistroy.spbstu.ru/article/2018.67.4/ 4_67.pdf
RAR RUS 62-71 G-1611-2018 56352359500 0000-0002-5156-7352 Volgograd State Technical University Korniyenko Sergey Valeryevich svkorn2009@yandex.ru
Volgograd, Russian Federation
 Volgograd State Technical University Glukhoverya Darya damamne@mail.ru
28, Lenina Ave., Volgograd, Russia, 400005
 Influence of placement of the window block on wall thickness on heat losses Interface of the window block to an external wall is one of the most responsible knots at thermal engineering design of envelope. For reduction of thermal losses through knot, it is necessary to consider not only design features of a window and wall, but also an arrangement of the window block in the thickness of a wall. In this article the assessment of influence of placement of the window block on thickness of the wall made of constructive and thermal-insulating materials on additional losses of warmth through knot is executed. Various options of an arrangement of the window block on wall thickness are considered: on depth of "quarter" and in the middle of a wall. From the received results of graphic calculation of the two-dimensional stationary temperature field it is established that specific additional losses of warmth in knot of interface of the window block to a wall with application of "quarter" are 38% more, than at placement of the window block in the middle of a wall. Placement of the window block in a neutral zone of an external wall reduces specific additional losses of warmth and increases thermal efficiency of knot. Calculated values of specific additional thermal losses through knot of interface of the window block to a wall are agreed with the data of DIN 4108 of Bbl 2:2004-01 that confirms correctness of results of research. The results of graphic calculation are preliminary and can be specified by numerical modeling of the two-dimensional stationary temperature field. Results of calculation of the temperature field can be used at specification of standard requirements to placement of the window block on thickness of the wall made of constructional and thermal-insulating materials in construction and by means of thermorenovation 10.18720/CUBS.67.5 699.865 buildings construction civil engineering heat losses energy efficiency window block enclosing structures temperature field graphical approach jamb https://unistroy.spbstu.ru/article/2018.67.5/ 5_67.pdf
RAR RUS 72-85 Volgograd State Technical University Zakurdaeva Olga olya.zakurdaeva.n@yandex.ru
28, Lenina Ave., Volgograd, Russia, 400005
 Volgograd State Technical University Golikov Alexander alexandr_golikov@mail.ru
28, Lenina Ave., Volgograd, Russia, 400005
 Damageability of antenna and mast constructions of cellular communication The article classifies and describes the main types of AMS and their damage. Estimation of the influence of certain types of damage on the bearing capacity and usability. The calculation of the influence of the angle of the braces relative to the barrel of the mast on the operation of the structure as a whole. Built analytical dependences characterizing the influence of individual damages on the stress-strain state of masts of cellular communication. 10.18720/CUBS.67.6 624.07 antennas-mast constructions masts delays injuries stress-strain state bearing capacity usability https://unistroy.spbstu.ru/article/2018.67.6/ 6_67.pdf
RAR RUS 86-94 H-9967-2013 16412815600 0000-0002-8588-3871 National Research University Moscow Power Engineering Institute Kirsanov Mikhail Nikolaevich mpei2004@yandex.ru
Moscow, Russian Federation
 The formula for calculating the deformations of the arched truss with arbitrary number of panels The scheme of statically determinate planar symmetric arched truss is proposed. Lattice of truss comprises a rack and braces. The derivation of the formula for the deflection of a truss under the influence of a load uniformly distributed over the nodes of the upper or lower belt, depending on the size of the truss and the number of panels is given. To summarize the number of solutions for trusses with a finite number of panels to the General case used the method of induction. All the transformations and solution of equilibrium equations of nodes are performed in the system of computer mathematics Maple. For finding recurrence equations satisfied by the coefficients in the formulas involves specialized operators of the system Maple. Asymptotic property of the solution is found out. Obtained and analyzed formula for forces in the most compression and tie rods. 10.18720/CUBS.67.7 624.04 truss arch Maple induction deflection exact formula critical forces https://unistroy.spbstu.ru/article/2018.67.7/ 7_67.pdf