69439 2658-5553 11 4 11 2019

REV RUS 7-22 Peter the Great St. Petersburg Polytechnic University Gnam Polina polina_padfoot@mail.ru

St. Petersburg, Russia

Analysis of methodologies for technical inspection of buildings to determine their physical wear The number of dilapidated and emergency buildings and structures is increasing every year. Various factors can lead to this, including obsolescence of structures and natural causes. Besides, maintenance of buildings and structures leads to their aging, that is, to physical wear of structural elements. Therefore, the task of determining the actual technical state of an object becomes important. The article deals with qualitative and quantitative operational characteristics of buildings, as well as an overview of the current state of the real estate fund in St. Petersburg. The purpose of this article is to analyze the change in modern methods and technologies for technical survey and operation of real estate, as well as operational characteristics that affect the normative technical condition of buildings and structures. It has been found necessary to develop a new methodology for calculating the physical wear and tear of a building. 10.18720/ALF.11.1 Building structures operational characteristics deterioration reliability durability housing fund technical survey https://alfabuild.spbstu.ru/article/2019.11.1/ 11_1.pdf

REV RUS 23-33 Peter the Great St.Petersburg Polytechnic University, Russian Federation Pachina Natalia sasha.pa4in@yandex.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Peter the Great St.Petersburg Polytechnic University, Russian Federation Nikitin Stanislav nse85@mail.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Peter the Great St.Petersburg Polytechnic University, Russian Federation Odintsov Nikita Olga19940519@mail.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Corrosion effects on ferroconcrete constructions of a transshipment complex of petroleum products One of the most important problems now is the effect of aggressive environment on reinforced concrete structures. These effects can be a cause of future damaging effects. The purpose of this article is to review the reasons of the aggressive impact on the elements of the mooring structure, caused by the operating environment and technological factors. By reviewing the aggressive effects on structural elements, and by studying the requirements of current regulatory documents for the protection of building structures, and by familiarizing with the classical concept of corrosion, it was established that the existing standards do not allow predicting or setting the service life of building structures depending on the working conditions. A calculation was made, and signs of corrosion of the reinforced concrete structure were determined for different periods of time. The condition of reinforced concrete elements is predicted after prolonged exposure to aggressive environment. The calculation of the loss of strength of the surface layer of concrete. Determined the depth of neutralization of concrete when exposed to an aggressive environment. Conclusions about the possibility of using corrosion parameters to determine the service life of reinforced concrete structures 10.34910/ALF.11.2 Concrete reinforced concrete corrosion durability aggression berthing facilities https://alfabuild.spbstu.ru/article/2019.11.2/ 11_2.pdf

UNK RUS 34-53 Peter the Great St.Petersburg Polytechnic University, Russian Federation Shvets George renegat51rus@mail.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Peter the Great St.Petersburg Polytechnic University, Russian Federation Nedviga Ekaterina nck@bk.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Computer-aided design software for education in Building Engineering The article discusses issues related to the teaching of architectural CAD systems based on BIM-technology in universities with the construction profile. Research was conducted among the most common in the Russia CAD based on BIM-technology (Autodesk Architecture, Nemetschek Allplan, Graphisoft ArchiCAD and Autodesk Revit) in terms of ease to development by students. Authors consider basic tools of each program and make conclusions about their functionality and convenience. As a result, authors called Graphisoft ArchiCAD the most useful program to study. Also, authors discuss the importance of studying programs based on BIM-technologies in universities 10.34910/ALF.11.3 Computer-aided design (CAD) Nemetschek Allplan Graphisoft ArchiCAD Autodesk Revit education comparison BIM https://alfabuild.spbstu.ru/article/2019.11.3/ 11_3.pdf

UNK RUS 54-69 0000-0001-9542-2430 Nurmukhametov Renat Rustamovich nrenatkazan@gmail.com

StroyInvestCapital LLC,26, Sinopskaya embankment, Saint Petersburg, Russia, 191167

Deformability of water saturated clay reinforced by vertical elements Wide range of soft water saturated clays distribution. Not effective technical design used at the moment is generally based on soft soils exclusion from calculations. It leads to necessity of similar scientific researches. Use of different reinforcing elements at weak clays increases young modulus and improves water saturated soils’ deformability. Necessity of new deformation model Invention becomes obvious. Model that would explain behavior of soft clays reinforced by vertical elements. Current research provides theoretical equations those are created based on review of recent scientific publications. Theory is developed based on assumption of soil’s and reinforcement conjunction deformability. Equations for reinforcement and soil’s body stress calculations are made based on sequence of processes at soft clays those appear after load application including consolidation, rheology. Proposed equations allow predicting foundation settlements’ figures depending on time for the cases when bedding consists from soft water saturated clayey soils reinforced with vertical elements. Calculated stresses allow calculating strains of reinforced soil as per heritage creep theory by Boltzmann – Walter. Invented theory certainly requires verification by number of additional tests that would deeply investigate time series deformation. It needs to be simplified by creating simple calculation software program 10.34910/ALF.11.4 strengthening of water saturated clayey soils water saturated clayey soil soil reinforcement soft clay pore pressure buildings’ foundations consolidation rheological parameter time series deformation deformation model https://alfabuild.spbstu.ru/article/2019.11.4/ 11_4.pdf

UNK RUS 70-81 15730895100 Peter the Great Saint-Petersburg Polytechnic University Gorshkov Nikolai

St. Petersburg, Russian Federation

https://orcid.org/0000-0002-8723-4154 Peter the Great St.Petersburg Polytechnic University, Russian Federation Zheleznov Sergei fiery_eagle@bk.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Peter the Great St.Petersburg Polytechnic University, Russian Federation Lemeshko Roman romanlemeshcko@mail.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Peter the Great St.Petersburg Polytechnic University, Russian Federation Poyda Sergey Poida-serega2012@yandex.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

The introduction of BIM technologies in construction The main problem of any innovative technology is its implementation in the production process. The aim of this work is the identification of advantages and disadvantages of BIM technologies, defining the prospects and tendencies of development of the technology. Building information modeling is an approach to the construction, equipping, operation and repair of the building, which involves the collection and comprehensive processing in the design process of all architectural design, technological, economic and other information about the building. Active the widespread adoption of BIM is a guarantee of high quality of the project, efficient use of resources, as well as the key to improving people's lives and reduce the impact on the environment. The research object of this article is directly the BIM modeling technology. The relevance of this topic is high, because the implementation of BIM technologies in the construction allows you to solve a number of issues: significantly reduce the engineering time, increases the operating efficiency of the finished building, reduced the number of errors. The work identified the main advantages and disadvantages of the introduction of BIM technology in construction, is considered on the example of domestic and foreign organizations and companies. The tendencies of development of technologies in the field of civil engineering are identified 10.34910/ALF.11.5 building information model - BIM Building project innovative technology planning and design building industry information model information management engineering and construction industries https://alfabuild.spbstu.ru/article/2019.11.5/ 11_5.pdf

REV RUS 82-91 Peter the Great St.Petersburg Polytechnic University, Russian Federation Galay Vladislav galaj.vs@edu.spbstu.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Stability of steel centrally compressed rods in the methods of SP 16.13330.2011 and EN 1993-1-1 One of the necessary calculations in the design of steel structures is the calculation of stability. And today, when calculating steel structures, as a rule, engineers are guided by various normative documents. Such as, for example, the Russian code of rules (SP) and European norms (EN). In this paper, the methods for calculating steel centrally compressed rods for stability according to the normative documents of SP 16.13330.2011 and EN 1993-1-1 are compared. Variants of calculation methods are chosen, which ensure the smallest difference between the factors determining the stability in the two methods. The factors determining the stability of the rods are analyzed. Graphs of the dependences of the bearing capacity of the rod on stability from the length of the rod, the yield stress of steel, and the geometric characteristics of the cross-section are given. The difference between the results of calculations using two methods is analyzed considering the type of the cross-section of the rod. In conclusion, the results of the study are presented 10.18720/CUBS.11.6 stability of steel rods central compression Euler's formulae yield stress of steel analysis of calculation methods https://alfabuild.spbstu.ru/article/2019.11.6/ 11_6.pdf

UNK RUS 92-110 Peter the Great St.Petersburg Polytechnic University, Russian Federation Grigorian Erik grigoryan.ea@edu.spbstu.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Peter the Great St.Petersburg Polytechnic University, Russian Federation Surovenko Victor victorandmihas@mail.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Peter the Great St.Petersburg Polytechnic University, Russian Federation Demidova Yulianna juliaandreeva99@mail.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Additive manufacturing. A review of research, opportunities and challenges 3D printing, known as additive manufacturing, can change the construction industry for the better. Greater structural efficiency, lower material costs, increased accuracy and cost-effectiveness, all these characteristics are inherent in the additive manufacturing process. The article talks about a sharp increase in publications on the topic of additive manufacturing. 50% of them are suitable for use as a fine aggregate. They also considered ways to improve the properties of materials: strength, speed, hardening, moisture protection, etc. Additive manufacturing opens up many possibilities for construction, but new problems arise with this, with a greater emphasis on testing and stress testing and new design methods 10.34910/ALF.11.7 3-D printing Additive manufacturing Building Information Modeling Construction industry Concrete Building materials https://alfabuild.spbstu.ru/article/2019.11.7/ 11_7.pdf

REV RUS 111-120 Peter the Great St.Petersburg Polytechnic University, Russian Federation Proskurovskis Arturs arprosk@gmail.com

195251, Russia, St. Petersburg, Polytechnic St., 29

0000-0001-6383-6639 Peter the Great St.Petersburg Polytechnic University, Russian Federation Nazinyan Levon Gaykovich nazinyan.lg@edu.spbstu.ru

Saint-Petersburg, Russia

Peter the Great St.Petersburg Polytechnic University, Russian Federation Tarasova Anna tarasova3.aa@edu.spbstu.ru

195251, Russia, St. Petersburg, Polytechnic St., 29

Peter the Great St.Petersburg Polytechnic University, Russian Federation Belyaeva Svetlana sbelaeva@gmail.com

195251, Russia, St. Petersburg, Polytechnic St., 29

Energy efficient wall materials for building cottages The main problem in choosing housing is the choice of the optimal place to live in terms of environmental cleanliness, developed infrastructure, safety of the area or territory, as well as the cost of housing itself. After analyzing the above mentioned factors, people often prefer to build cottages. That is why one of the primary tasks is the choice of enclosing structures and its materials because they make a substantial contribution to the durability, energy efficiency and thermal protection of a building. The purpose of this work is to analyze the market of wall building materials, select the most frequently used and energy-efficient solutions, as well as compare their energy efficiency and cost per square meter of the wall made from each of the selected materials 10.34910/ALF.11.8 gas concrete ceramsite concrete bricks durable materials energy efficient materials wall materials price comparison https://alfabuild.spbstu.ru/article/2019.11.8/ 11_8.pdf