33407 2304-6295 Construction of Unique Buildings and Structures 8 71 2018 1-72
RAR RUS 1-12 Peter the Great St. Petersburg Polytechnic University Atavin Ilya ilya_region51@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University Kazakova Yuliya permkim5@gmail.com
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 O-1930-2017 6701751705 0000-0002-7889-1996 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation Melnikov Boris Evgenevich melnikovboris@mail.ru
St. Petersburg, Russian Federation
 7402499192 Chair of mechanics of multifunctional structures, Institute of Solid Mechanics, Dresden University of Technology, Leading researcher Semenov Artem Semenov.Artem@googlemail.com Influence of nodal connection stiffness on the mechanical characteristics of the rack The article is devoted to the evaluation of the torsional stiffness of the beam junction. The influence of the connection on the bearing capacity and stability of the construction of a thin-walled rack is analyzed. As an example, we consider models of beams with a length of 1.5 m. Torsional stiffness values for a beam-stanchion connection under extreme loads are obtained. Results of full-scale tests will be compared with the results of electronic calculations made in a specialized software package. 10.18720/CUBS.71.1 69 structural mechanics light-weight steel thin-walled structure cold-formed profile finite-element method https://unistroy.spbstu.ru/article/2018.71.1/ 1_Atavin_71-(1).pdf
RAR RUS 13-21 Peter the Great St. Petersburg Polytechnic University Zimin Sergej zimin_sergei@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Vasilyeva Ekaterina katrinfr@inbox.ru Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia Sudar Alexey sudar2307@mail.ru Stress-strain state of brick facing in interface with floor slabs in absence of an expansion joint The article gives results of investigations of the stress-strain state of the face layer made of brickwork in the zone of conjugation with overlap at temperature influence. For getting estimated data was used software package ANSYS. There was made a model of brickwork between two reinforced-concrete ceiling panels. Pretest analysis of general stress strain behavior allowed to determine the most dangerous points, where strain changes depending on variable parameters were controlled. After the analysis were got dependence of strain from anchor rigidness and contact area value. Detected relationships could allow select optimal anchor rigidness and value of brickwork cantilever to provide minimal strain in dangerous points. That could rise working life of bricks without any damages. 10.18720/CUBS.71.2 69 brick masonry ancho multi-layer wall facing layer temperature effects https://unistroy.spbstu.ru/article/2018.71.2/ 2_Zimin_71.pdf
RAR RUS 22-40 G-1611-2018 56352359500 0000-0002-5156-7352 Volgograd State Technical University Korniyenko Sergey Valeryevich svkorn2009@yandex.ru
Volgograd, Russian Federation
 O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru
St. Petersburg, Russian Federation
 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
 Peter the Great St. Petersburg Polytechnic University Pestryakov Igor pestr47@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Operational humidity of autoclaved aerated concrete in outer walls Moisture is a big problem for outer walls in Russia since it causes destruction of buildings and structures. The objects of investigation are outer walls from autoclaved aerated concrete blocks (AAC) for apartment residential buildings located in various climatic zones of the Russian Federation. The calculation of moisture conditions of outer walls is extended by two ways: by simplified method (according to National Standard SP 50.13330) and specified method on the basis of the analysis of moisture conditions of enclosing structures in an annual cycle. Calculations showed that, there is not a critical repetitive moisture accumulation on the layers of the wall, the placement of an additional vapor barrier layer in designs isn't required. The functional dependence of the specific heat-insulation characteristic of a building on humidity of AAC in outer wall is defined. The criterion of remoistening of AAC in outer wall based on the admissible operational humidity is formulated. The results of investigation allow estimating more precisely moisture conditions of AAC at design of buildings. 10.18720/CUBS.71.3 69 AAC outer walls thermal conductivity vapor permeability heat insulation humidity https://unistroy.spbstu.ru/article/2018.71.3/ 3_Kornienko_71.pdf
RAR RUS 41-50 0000-0001-9325-2335 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation Ismailov Aleksey ismailov-aleksei@mail.ru
St. Petersburg, Russian Federation
 Peter the Great St. Petersburg Polytechnic University Lazarev Yuri Lazarev-yurij@yandex.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Quality indicators of Russian bitumen road emulsions The object of investigation is bitumen road emulsions. The article deals with the main quality indicators of bitumen road cationic emulsions (EBDC) produced on semi-automated installations KATION-10. Current studies of existing techniques for the preparation of bitumen emulsions are analyzed. Studies of EBDK-B and EBDK-M made on various emulsifiers have been carried out. The obtained experimental data are analyzed. The most effective technological solutions for providing the required quality of bitumen road cationic emulsions have been identified. 10.18720/CUBS.71.4 69 emulsions bitumen road cationic; quality control; emulsifiers technological processes technological solutions highways hydraulic structures https://unistroy.spbstu.ru/article/2018.71.4/ 4_Ismailov_71.pdf
RAR RUS 51-62 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
 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 Zimin Sergej zimin_sergei@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru
St. Petersburg, Russian Federation
 Peter the Great St. Petersburg Polytechnic University Borshcheva Ksenia ksenbor@icloud.com
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia Belkina Tatyana Belkina18.1996@gmail.com Crack-resistance of the reinforced concrete wall under conditions of temperature deformation constrained by the foundation The article considers the problems of temperature and contractible cracks formation in thin (200-300 mm) and extensional reinforced concrete walls constructed on hardened concrete foundation. The temperature gradients in walls of small thickness are insignificant and do not cause dangerous tensile stresses, however, the hardening of fresh concrete is often accompanied by the formation of vertical cracks starting at the area of contact with the base and extending upward, sometimes to the full height of the wall. Cracking in such cases occurs due to the thermal deformation constraint by the wall base. Generally, the process of walls cooling after maximum selfheating represents the main danger, when the thermal deformation acts in the same direction with shrinking, that causes the tensile stresses. The aim of the research is to verify the efficiency of the proposed methods of thermal cracking resistance by the results of thermal stress strain state calculation of the reinforced concrete wall rigidly connected to the foundation. The hypotheses, heating the surface of the base before concreting the wall and creating transverse slots formed by the laying of steel plates in the lower zone of the wall, have not proven their effectiveness. The article recommends taking measures to reduce the temperature peak during the first days after concrete has been laid (concreting takes place during the cold time of the day; prevent sunlight from acting on concrete and not using heat insulating shelters or heating). After passing through the temperature peak, it is necessary to slow down the cooling by applying thermal insulation or heating. Control of shrinkage should be carried out at all stages of concrete production, starting with the selection of its composition. 10.18720/CUBS.71.5 69 crack resistance thermal stress-strain state ANSYS thermal forces strength deformations shrinkage https://unistroy.spbstu.ru/article/2018.71.5/ 5_Borshcheva_71.pdf
RAR RUS 63-72 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia Cherkasov Sergey serezhacherkasov98@mail.ru Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia Akinin Oleg olegakinin98@yandex.ru St. Petersburg State University of Architecture and Civil Engineering Korneeva Elena linka360639020@yandex.ru
St. Petersburg, Russia
 ABD-2048-2021 57205074229 0000-0003-3154-8207 Peter the Great St. Petersburg Polytechnic University Sabri Mohanad Muayad Sabri mohanad.m.sabri@gmail.com
St. Petersburg, Russian Federation
 Absorption of water of Crimean nummulite limestone One of the most common facies of limestone in Crimea is nummulite. Unfortunately, physic-mechanical properties of this building material are insufficiently investigated. The purpose of this research is to study the Crimean nummulite limestone and analyze the results obtained in the course of the experiment to determine its water absorption by mass. The main research methods were the analysis of scientific literature and the conduct of laboratory tests. Several Russian articles allowed to find numerous deposits of this building material in the Crimea. Furthermore, the water absorption of nummulite limestone was determined experimentally and compared with the results of other laboratory tests of this material. Also, index of the water absorption can be improved by various additives such as calcium polysulphide or fluorine-silicone compounds. Contrary to expectations, the results indicated that nummulite limestone can be used in construction of the road surfaces, industry and other spheres. 10.18720/CUBS.71.6 69 absorption of water limestone nummulite limestone mountain Crimea building materials https://unistroy.spbstu.ru/article/2018.71.6/ 6_CHerkasov_71.pdf