33407 2304-6295 Construction of Unique Buildings and Structures 5 44 2016 1-89
RAR RUS 7-18 Peter the Great St. Petersburg Polytechnic University uznetsova Valeria kuznetsova_vy@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 AAH-2547-2019 7801686579 0000-0001-7011-8213 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation Barabanshchikov Iurii Germanovich ugb@mail.ru
St. Petersburg, Russian Federation
 Corrosion of the steel thin-walled profiles in the enclosure structures Light steel thin-walled structures (LSTS), in particular, thermoprofiles are widely used in construction of building frames. According to the latest amendments in the documentary standards, zinc coated thermoprofiles without additional paint coating may be used as load-bearing structures only in non-aggressive conditions. Applying paint coating in addition to a zinc one entails extra expenses, while efficiency of this measure may not correspond to the costs. Resolving this issue requires special researches. The purpose of this article is to analyze conditions of corrosion processes and to develop methods of testing thin-walled steel products, taking into account the features of their service in walling. 10.18720/CUBS.44.1 УДК 691.714:691-422 thin-walled galvanized steel profiles; thermal profile; corrosion; procedure for corrosion testing; protecting coating of paint; https://unistroy.spbstu.ru/article/2016.44.1/ 1_barabanschikov_44.pdf
RAR RUS 19-30 Peter the Great St. Petersburg Polytechnic University Kiryudcheva Anastasia kirudcheva@mail.ru Peter the Great St. Petersburg Polytechnic University Shishkina Victoria Lampyxx@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 G-2929-2018 56227381900 0000-0003-2673-4566 Peter the Great St. Petersburg Polytechnic University Sergeeva (Nemova) Darya Viktorovna darya0690@mail.ru
St. Petersburg, Russian Federation
 Energy efficiency of building envelopes for public buildings One of the simplest and best ways to save energy in the construction industry is the reduction of heat loss through the building envelope of buildings and structures. The theme of energy efficiency is becoming more and more popular, many scientific articles are published, however the purpose of this article is to identify the most energy-efficient building envelope in public building. To do this, two types of designs were chosen: the usual multilayered facade and hinged ventilated facade with the same thickness of insulation layer. This article consists of three main parts: first of all, the best and most used envelope constructions for public buildings have been chosen; Then the Thermal calculation of structures have been made; finally the facades were compared from economical point of view, which have shown that the the total cost of materials and installation for the facade of a multi-layer is less than for ventilated facades, but the difference is small, so in the result it is recommended to use the ventilated facade. 10.18720/CUBS.44.2 УДК 699.86 energy efficiency; building envelop; hinged ventilated facade; thermotechnical calculation; energy saving; https://unistroy.spbstu.ru/article/2016.44.2/ 2_kiryudcheva_44.pdf
RAR RUS 31-45 Federal University of Technology Minna Auta Samuel Mahuta smahuta@yahoo.com
Minna, Nigeria
 Federal University of Technology Minna Uthman Ademola uthmania@yahoo.com
Minna, Nigeria
 Federal University of Technology Minna Sadiku Salawu profssadikov@gmail.com
Minna, Nigeria
 Federal University of Technology Minna Tsado Theophilus Yisa teoaggie@yahoo.com
Minna, Nigeria
 Peter the Great St. Petersburg Polytechnic University Shiwua John jshiwua@yandex.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Flexural strength of reinforced revibrated concrete beam with sawdust ash as a partial replacement for cement This article examines the flexural strength of reinforced and re-vibrated concrete beams using Saw Dust Ash (SDA) as a partial replacement for Ordinary Portland Cement (OPC). Chemical analysis of the SDA sample contains the major chemical oxides found in cement: SiO2 (27.23%), Al2O3 (29.05), Fe2O3 (9.32%). Seven beams of sizes 150mm x 150mm x 600mm reinforced with 12mm diameter steel bars (Y12) were cast for each 0%, 5%, 10%, 15% and 20% replacements of OPC with SDA. The beams were re-vibrated for 20 seconds at an interval of 10 minutes successions up to 1 hour after initial vibration. Another set of three beams of same size and reinforcement for each percentage replacements of OPC with SDA were also cast but were not revibrated. Fifty beams were cast in total: thirty-five revibrated and fifteen non-revibrated beams and were all cured for 28 days. Flexural strength test carried out on each beam shows maximum flexural strength at 0% followed by 5% replacement at twenty (20) minutes revibration time lag interval. The maximum flexural strength attained were 10N/mm2 at 0% then 9.5N/mm2 at 5% for the revibrated beams respectively, while for non-revibrated beams 8.87N/mm2 and 6.67N/mm2 for 0% and 5% replacements were attained. Revibration is thus seen to improve the flexural strength of reinforced concrete beams and thus SDA can be used up to 5% to replace cement. 10.18720/CUBS.44.3 УДК 691.3 concrete; flexural; strength; revibration; sawdust ash https://unistroy.spbstu.ru/article/2016.44.3/ 3_auta_44.pdf
RAR RUS 46-57 Peter the Great St. Petersburg Polytechnic University Pestryakov Igor pestr47@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Gumerova Eliza eliza_gumerova@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 LLC "Applied Mechanics",52 (304) Kupchin Alexey cup4in@ya.ru
Marshala Govorova St., St. Petersburg, Russia, 198095
 Assessment of efficiency of the vibration damping material «Teroson WT 129» The application of vibration damping material is considered to be the most effective way of vibration absorbing of the steel shells of wagons and locomotives. The study showed dissipative characteristics of material by the example of the "Teroson WT 129", which were obtained experimentally: the elastic modulus E=0,096; 0,103 MPa, the dissipation factor ŋ=0,628; ŋ=0,454 for appropriate coating thickness 3.6 mm and 6.1 mm. Based on the findings comparative analysis was made with existing vibration-absorbing mastics: characteristics of the new coating "Teroson WT 129" higher than dissipative properties of other materials. In addition, our task was to estimate the effectiveness of the new material: a reduction of the vibration level ∆N is equal to 29dB. The final result of this study was the good prospects of practical application of studied material in thin sheet metal constructions in the manufacture of vehicles, railway wagons. 10.18720/CUBS.44.4 УДК 691 Vibration; vibroabsorbing; vibration absorbing materials; mechanical loss coefficient; rail transportation; construction https://unistroy.spbstu.ru/article/2016.44.4/ 4_pestryakov_44.pdf
RAR RUS 58-71 Peter the Great St. Petersburg Polytechnic University Sudar Olga SudarOlga@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 56297902900 0000-0003-2842-4633 OZIS-Venture LLC Ulybin Alexey Vladimirovich ulybin@mail.ru
St. Petersburg, Russian Federation
 Peter the Great St. Petersburg Polytechnic University Kukushkina Galina kukushkina_ga@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 The cost calculation of inspection buildings and structures on engineering man-hours There is a large number of collections of reference prices, used by specialists, to assess the cost of the inspection of buildings and structures now. However, there is no uniform collection to determine the cost of the inspection. In addition, there is no unified approach to the formation of prices for the execution of works. The article deals with existing approaches to determining the value of work based on the calculation of labor costs. Determine the cost of works on visual inspection of a variety of ways: in labor costs and collections of basic prices. The authors concluded about the application of the method of calculating the value of labor costs and possible ways of its application. 10.18720/CUBS.44.5 УДК 69.003 engineering man-hours; inspection buildings and structures; collection of basic prices; estimated cost; pricing; https://unistroy.spbstu.ru/article/2016.44.5/ 5_sudar_44.pdf
RAR RUS 72-89 Peter the Great St. Petersburg Polytechnic University Sudar Olga SudarOlga@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 56297902900 0000-0003-2842-4633 OZIS-Venture LLC Ulybin Alexey Vladimirovich ulybin@mail.ru
St. Petersburg, Russian Federation
 Peter the Great St. Petersburg Polytechnic University Kukushkina Galina kukushkina_ga@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 The review of the existing standards of pricing on technical inspection of buildings and structures There is a large number of standards of pricing for technical inspection of buildings and structures now. At pricing for carrying out prospecting works experts use collections. In this article the analysis of contents of several collections of the prices is made for establishment of the reason of dispersion of costs of the works determined by different budget standards. The order of determination of cost of inspection is considered. Comparison of values of the correcting coefficients complicating performance of work and also quotations on tool measurements in various reference books is executed. By results of the analysis of standards the conclusion is drawn on need of development of the uniform collection for determination of cost of inspection. 10.18720/CUBS.44.6 УДК 69.003 pricing; collection of the base prices; estimated cost; inspection of buildings and structures; design and exploration work; https://unistroy.spbstu.ru/article/2016.44.6/ 6_sudar_44.pdf