69439
2658-5553
AlfaBuild
9
2
9
2019
1-88
REV
RUS
7-16
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Petrov
Stanislav
Smileik1998@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Magomadov
Ismail
Ismailwlya@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
10.34910/ALF.9.1
https://alfabuild.spbstu.ru/article/2019.9.1/
9_1.pdf
REV
RUS
17-28
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Karimova
Alina
alinakari19@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Paramonova
Marina
MaryRG@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Rupture and repair of artificial runway pavements
Plane is one of the most widespread kinds of transport nowadays. Planes are essential part of our life. Safety during the flight is very important. It is known that takeoff and landfall are the most dangerous moments of the flight. That is why it is important to make provision of the reliability at these points in time. A special airfield runway is necessary to make takeoff landfall operations possible. There are many different runway pavements nowadays and it is necessary to define the safest one. The main factors in choosing materials for aerodrome pavement are stability, safety during operations, coefficient of shagginess and smoothness. Quickness and robustness are very important factors while making a selection of methods of repair airfield runway. It has been discovered that all irregularities embarrass air staff during their work. It has been made with the help of questioning of pilots. The aerodrome pavement condition is constantly controlled with the help of different methods and tools. By so doing, it is possible to define operational endurance and necessity of repair. Previous studies have indicated immunities to usual workloads of different aerodrome pavements, behavioral ruptures and methods of repair of such materials. The results of the study show that pavements that are less subject to any changes are the safest. Based on the findings it has been discovered that definitive material for aerodrome pavements is in developmental stage now. That is why this problem is one of the most important capital problems under discussion in modern aviation. All researches are directed to determination of the material that would be steady to surface scaling and breaking down. Finding of such material will help to escape 10% of all flight accidents and safe a lot of people’s lives. Because of it, this problem is the subject of wide speculation
10.34910/ALF.9.2
Construction; civil engineering; airfield runway; runway pavements; repair airfield runway; pavement condition; surface scaling
https://alfabuild.spbstu.ru/article/2019.9.2/
9_2.pdf
REV
RUS
29-40
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Simankina
Tat'yana
talesim@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Yufereva
Anna
yufereva.a-16@yandex.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Urbancova
Michaela
urbancova.misa@seznam.cz
Accident rate in construction in Russia and the Czech Republic
In addition to the visible result, an illustration of the high quality of construction work is the qualitative provision of safety and labor safety, the main indicator of which is the level of industrial injuries on the site, in the enterprise and in the industry as a whole. The article analyzes the causes of injuries on construction sites in Russia and the Czech Republic, presents the statistical data on injuries and deaths over the years, identifies similarities and differences in the field of injuries. Despite the development of technology, analysis of the causes of injuries showed that the level of injuries is high everywhere. The issues of strengthening control over the observance of safety rules and labor discipline, as well as the introduction of the most advanced methods for preventing injuries in construction, optimization of management methods and work organization remain relevant.control over the observance of safety rules and labor discipline, as well as the introduction of the most advanced methods for preventing injuries in construction, optimization of management methods and work organization remain relevant
10.34910/ALF.9.3
construction
labour protection
occupational injuries
accident rate
fatality rate
labour safety
risk
risk factors
https://alfabuild.spbstu.ru/article/2019.9.3/
9_3.pdf
REV
RUS
40-61
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Semashkina
Daria
daria.semashkina@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
56237511300
Steel Construction Development Association
Nazmeeva
Tatiana Vilsovna
naztv@mail.ru
Moscow, Russian Federation
Diagrid structures as load-bearing systems of buildings
The article is devoted to one of the tendencies of modern high-rise construction - diagrid bearing structures. Such type of load-bearing system have become a popular solution in recent decades for buildings with different functional purposes, shapes, heights and spans, due to their simultaneous constructive efficiency and architectural expressiveness. Also diagrid structures are able to adapt and provide structural support to a wide range of non-rectilinear geometric shapes. The author considers the history of development and the prerequisites for the application of diagonal-grid shell systems as the main structural framework of buildings, including unique ones. The main projects with the use of diagrid structural systems as well as studies related to similar structures were analyzed. The main directions in the construction of high-rise buildings were disassembled
10.34910/ALF.9.4
load-bearing system
frame
diagrid system
building structures
unique buildings
metal frame
https://alfabuild.spbstu.ru/article/2019.9.4/
9_4.pdf
REV
RUS
62-69
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Shishkina
Viktoria
Lampyxx@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Ermoshin
Nikolay
ermonata@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Methodology for assesing the human resources quality of the design organization
In the conditions of economic instability and economic sanctions, decrease in consumer demand, "mobility" of the political and legal environment and normative and technical regulation of construction activity increase in effective management of quality of investment and construction projects becomes the defining factor of successful work and development of the enterprises and organizations of construction branch. It fully belongs not only to production, but also design activity. All indicators of efficiency and safety of the investment and construction project depend on quality of design. This article proposes a methodology for assessing the human resources quality of the design organization. The schematic diagram of formation of system of basic qualification indicators for staff of the design organization is submitted. And also the algorithm for calculation of quantitative values of qualification indicators in each realization of imitating model is shown.
10.34910/ALF.9.5
Staff capacity
qualification
qualification indicators
qualification level
staff capacity quality
algorithm for calculation of the qualification level
https://alfabuild.spbstu.ru/article/2019.9.5/
9_5.pdf
REV
RUS
70-80
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Goloshchapova
Anastasia
nastuwka.mail@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Goloshchapova
Elena
lenochka05.10.95@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Ikhlef
Sonya
ikhlef.sonia17@gmail.com
195251, Russia, St. Petersburg, Polytechnic St., 29
Water supply networks. The practice of accounting for local pressure losses
Local pressure losses are caused by resistances in the armature, fittings and equipment, due to the narrowing and widening of the flow, changes in the flow direction, merging and separation of the flow, changes in the shape and size of the channel, etc. Analysis of various methods for calculating the coefficients of local resistance of pipelines in designing a circular pressure network of water supply is of practical interest from the point of view of energy costs when moving the liquid. Literary sources contain various formulas and tables for determining the coefficients of local resistances. However, the values found from these data give rather large discrepancies, even for simple cases of local resistances (retraction, rotation). In this regard, we have to state that the most reliable way to determine the coefficients of local pressure losses is the experiment.
10.34910/ALF.9.6
coefficient of resistance
ring networks
local resistance
short pipelines
water supply networks
https://alfabuild.spbstu.ru/article/2019.9.6/
9_6.pdf
REV
RUS
81-88
Peter the Great St.Petersburg Polytechnic University, Russian Federation
Fetisova
Galina
galina.fetisova.95@mail.ru
195251, Russia, St. Petersburg, Polytechnic St., 29
Comparative characteristics of the transmission length in prestressed concrete structures
Determination of the effective length of the stress transmission zone is one of the necessary conditions for designing prestressed reinforced concrete structures. The degree of stress transfer to concrete directly affects the strength and reliability of structures. Therefore, this article analyzes the existing research developments. Also, it compares the methods for determining the transmission length in a numerical, finite-element and experimental way. In particular, the numerical calculation was carried out according to the normative formula for heavy concrete, and the finite element model was constructed by analogy with the experimental scheme used in the earlier study. As a result, it was established that the calculation according to the normative formula and the modeling by the finite element method give overestimated values of the transmission length in comparison with the experimental ones. This is important in the analysis of prestressed structures made of new high-strength materials, which cannot be fully calculated using standard formulas and require separate analysis
10.34910/ALF.9.7
691.328
reinforced concrete structures
prestressed reinforced concrete
transmission length
force variation
high-strength concrete
adhesion
finite element method
https://alfabuild.spbstu.ru/article/2019.9.7/
9_7.pdf