33407 2304-6295 6 21 2014 1-147

RAR RUS 7-16 Ss. Cyril and Methodius University in Skopje Samardzioska Todorka samardzioska@gf.ukim.edu.mk

blvd. Goce Delcev 9, 1000 Skopje, Republic ofMacedonia

Acoustic performance residential buildings(for example Macedonia) The intensity in the building construction, populous areas, traffic congestion and the numerous noise sources, especially in the urban areas, impose the need of adequate materialization of buildings that will ensure an ideally insulated living space. Best confirmation whether the partition walls meet the required value for sound insulation is the field measurement, which reflect the actual situation taking into consideration all of the imperfections of the building process and the flanking transmission of the sound. Field measurements of 18 differenttypes of partition walls in residential buildings in Macedonia were carried out. The results are summarized in the form of conclusions, observations, and recommendations for further research in this area. 10.18720/CUBS.21.1 69 sound noise sound insulation sound reduction index partition wall https://unistroy.spbstu.ru/article/2014.21.1/ 1_samardzioska_21.pdf

RAR RUS 17-31 Saint-Petersburg State Polytechnical University Startsev Sergey StartsevSA@biospacestroy.ru

29 Polytechnicheskaya st., St.Petersburg, 195251, Russia

Peter the Great St. Petersburg Polytechnic University Sundukova Arina asun91@mail.ru Reinforcement of brick masonry with composite materials and screw-in anchors In this paper, methods of masonry reinforcement by composite materials and by anchoring with stainless steel screw rods were observed. Analysis was made for existing methods of strengthening against which highlighted these two methods, as applied abroad and just begin to use on our practice. Low domestic experience of application similar techniques is explained by lack of regulatory base, which would regulate their use. Traditional methods of strengthening are effective, but also have a number of features, and are unacceptable for use in certain cases. For example,strengthening of the historical buildings, which appearance must to be kept. Application of these methods, can serve as real alternative, in that case.In this article was made analysis of existing methods of reinforcement masonry and also was suggested method of calculation. Conclusions and recommendations were made based on it. Advantages and disadvantages were viewed to each method, which should be based in the choice of works on strengthening brickwork. At the end, the conclusions were made for modeling and calculation of behavior of bricklaying with use of these materials, and for ideas of further tests, to confirmation by practical results. 10.18720/CUBS.21.2 69 reinforcement of structures brick masonry composite materials bars screw-in anchors https://unistroy.spbstu.ru/article/2014.21.2/ 2_sundukova_21.pdf

RAR RUS 32-57 AAR-2529-2020 6506030356 0000-0001-6744-9249 Tampere University, Tampere, Finland Garifullin Marsel marsel.garifullin@tuni.fi

Tampere, Finland

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

Buckling analysis of thin-walled cold-formed beams — short review This article provides a review of recent publications relating to buckling analysis of cold-formed profile in bending. Nowadays thin-walled structures offer a promising direction of development of civil engineering in Russia and worldwide and can be used in the construction of a number of structures for various purposes. The rapid pace of the scientific and technological progress, as well as the emerging trends towards rationalization of design and installation works,assign thin-walled structures one of the major roles in modern civil and industrial engineering. The review includes both theoretical works based on the rod and shell modeling of structures and experimental research results. Attention is paid to the publications containing a comprehensive analysis of the problem and including a comparison of analytical and experimental results. 10.18720/CUBS.21.3 69 bending local buckling distortional buckling global buckling interaction https://unistroy.spbstu.ru/article/2014.21.3/ 3_garifullin_21.pdf

RAR RUS 58-69 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 Komarinskiy Mikhail komarin@cef.spbstu.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Superplasticized technological properties of concrete mixtures Studieshave shown the ability of the Additive-3(C-3)in a significant dilution of the concrete mix. The mixture with OK=4 cm thinned to mobility OK more than 20 cm, and in experiments on the blurring of the test (for Suttardu) superplasticizer C-3 showed higher efficiency than superplastifikatory used. Furthermore, the addition of Additive-3 (C-3), unlike the polycarboxylates not possesses selective activity against various cements, which ensures the stability characteristics of the cement concrete mix different batches supplied during construction. With increasing content of cement in the concrete superplasticizer efficiency increases C-3, both in respect of workability and in relation to the concrete mix water separation. 10.18720/CUBS.21.4 69 superplasticizer concrete mix workability water gain mortar separation air entrainment https://unistroy.spbstu.ru/article/2014.21.4/ 4_barabanschikov_21.pdf

RAR RUS 70-88 Peter the Great St. Petersburg Polytechnic University Churakov Artemy temach11@gmail.com Biaxial hollow slab with innovative types of voids The invention of a new type of hollow core slabs was a breakthrough at the turn of 20th and 21st centuries. During the first decade there have been many studies on the feasibility of using the new technology. This article presents the different types of hollow core slabs technology that have appeared over the last 15 years. As a result of the review the advantages of a new kind of hollow slab over a solid slab were summed up.In this article the most famous of present examples of the new technology are also demonstrated. All the experiments and studies carried out, mainly by manufacturer companies, are supported by regulations and local/international codes. 10.18720/CUBS.21.5 69 voided slab biaxial hollow slab structural behavior punching shear capacity LEED bubbledeck cobiax u-boot https://unistroy.spbstu.ru/article/2014.21.5/ 5_churakov_21.pdf

RAR RUS 89-103 Peter the Great St. Petersburg Polytechnic University Duvanova Irina duvanova.i@mail.ru Peter the Great St. Petersburg Polytechnic University Salmanov Ildus ildussalmanov@gmail.com

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Concrete-filed steel tube columns in construction high-rise building and structures Modern construction is characterized by an increase in height of buildings and spans of overlaps, etc. This requires the use of columns having a high load bearing capacity at small cross-sections. One of solutions to this problem is to use concrete-filled steel structures. The article provides an overview of the application of these structures in foreign countries. The basic advantages and disadvantages of concrete-filled steel structures are stated. The basic problems of their application in modern construction and ways of theirsolution are given. 10.18720/CUBS.21.6 69 tube-reinforced concrete tube-reinforced concrete element composite material high-rise building exploitation bearing capacity https://unistroy.spbstu.ru/article/2014.21.6/ 6_duvanova_21.pdf

RAR RUS 104-119 Saint-Petersburg State Polytechnical University Maskaleva Vera vera.maskaleva@gmail.com

Russia, 195251, St.Petersburg, Polytechnicheskaya, 29

Peter the Great St. Petersburg Polytechnic University Mukhamadiev Vladimir mucha@list.ru Features of the weak clay soils The Article considers methodology of foundation calculation, providing safety of urban construction in difficult engineering - geological conditions of St.-Petersburg. Object of research is waterlogged argillous adjournment of various genesis and age of small and average degree. The article analyzes most widespread mathematical models of soil. The article gives the results of research: - the analysis of a situation in underground building of the St.-Petersburg region; - the analysis of nonlinear soil models, applied in most popular programs of calculation (model of Coulomb-Mohr, models of Cam Clay, EDP Cap Model, models with double hardening); - the analysis of soil in the conditions of a weighting and discharge; - the analysis of soil model combined by clayey grounds. 10.18720/CUBS.21.7 69 safety ofurban construction model of soil plastic soil deformation Cam Clay model model of Coulomb-Mohr EDP Cap Model foundation deformation https://unistroy.spbstu.ru/article/2014.21.7/ 7_maskaleva_21.pdf

RAR RUS 120-127 Peter the Great St. Petersburg Polytechnic University Korenevskaya Marina marishka.korenevskaya@gmail.com Peter the Great St. Petersburg Polytechnic University Lysiakova Ekaterina LKate26@mail.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

Peter the Great St. Petersburg Polytechnic University Bulatov Georgiy gybulatov@mail.ru

29 Politechnicheskaya St., St. Petersburg, 195251, Russia

The resumptive pile load capacity equation The article is devoted to different formulas, describing the equation of pile load capacity. The most part of current building projects, ranging from country houses to high-rise building, utilizes various types of pile foundations. Today exists a broad practice of designing piles and calculating pile load capacity, such as pyramidal, fundex, caisson piles etc. This brings the immense actualityto the universal methods of estimating these loads and verifying results. This approach should be based on a deep understanding of physical and mechanical principals of the process. Basing on the analysis of scientific literature and the common practice of pile load capacity equation, we introduce a universal formula to estimate pile load capacity for all types of piles. The resumptive formula may be widely used in different building projects and as an effective tool while developing engineering computer applications. 10.18720/CUBS.21.8 69 pile load capacity piles,pile types piles foundation calculating of pile load capacity https://unistroy.spbstu.ru/article/2014.21.8/ 8_korenevskaya_21.pdf

RAR RUS 128-147 Peter the Great St. Petersburg Polytechnic University Shagina Ekaterina shagina@me.com Robotics as a method of improving the safety construction production Construction is one of the leading sectors of economic activity. Every day the variety of performed construction projects is increasing, the complexity of the construction is also increasing. Construction work is usually characterized by high complexity and monotony that is particularly difficult for the workers. At the same time, the success of any construction project is determined by three factors: cost, quality and time. To improve these factors it is necessary to change the technology of construction, in accordance with international practice and technologies. To do this, there are robotic technologies that can speed up the construction process, improve the quality of work and reduce the proportion of manual labor. The article discusses the increasing safety constructionvia the introduction of robots. 10.18720/CUBS.21.9 69 building process automation robotization injuries in construction construction safety production construction robot https://unistroy.spbstu.ru/article/2014.21.9/ 9_shagina_21.pdf