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Инженерно-строительный журнал
ISSN 2071-0305 · Peter the Great St. Petersburg Polytechnic University · 265 artikel di indeks
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Intake rate through openings in the side wall of the duct
Subject. In technological and general ventilation ducts with a given uniformity of intake is often needed to be designed. The calculation of pressure losses in such ducts is complicated by the lack of reliable information about the characteristics of the flows at the inlet to the intake openings…
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Monitoring of the natural frequencies of Chirkey arch dam
The article presents a method for monitoring the natural frequencies of HPP dams according to continuous seismic observations. The object of the research is the largest arched dam in Russia, the Chirkey HPP located in the Caucasus. If damaged, it could cause great loss of property and human life…
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Spatial natural vibrations of viscoelastic axisymmetric structures
A mathematical model, methods and algorithm to assess the spatial natural vibrations of axisymmetric structures are given in the paper taking into account the variability of the slope and structure thickness in the framework of the viscoelastic theory of shells. Dissipative properties of the…
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Radiation changes of concrete aggregates under the influence of gamma radiation
The work (in connection with the small study of the effects of gamma ray on concretes and their components) contains the results of calculation and analysis of radiation changes of concrete aggregates under the influence of gamma ray on the basis of analytical methods developed previously during…
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Impact of anchored CFRP on the torsional and bending behaviour of RC beams
The scientific problem considered in the study is indeed one of the problems in the modern theory of reinforced concrete. Despite a significant number of studies on the problem of bending with torsion, to date. There are no sufficiently reliable solutions to this problem that most fully reflect the…
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Analysis of reinforced soil sustainability while tunnel construction
Object – reinforced ground array stability analisis. We have not found straight and general method of analysis in theory of limit equilibrium of soils (TLES). Methods – theory of stability (Culman method), method of limit parameters of TLES. A general scheme for solving the problem of the stability…
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Attenuation of the soil vibration amplitude at pile driving
The paper presents the solution of the wave equation describing the attenuation of the vibration amplitude in the soil during pile driving. It is suggested that in the soil there is the area around the pile where the energy dissipates due to plastic deformations, and then the areas of the elastic…
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Long span bridges buffeting response to wind turbulence
The buffeting response of the cable-supported bridges is studied. Several wind turbulence models are summarized and wind field models for practical application in bridge and structural engineering is proposed. The wind turbulence model comprises the mean wind and turbulence intensity profile, power…
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Analytical dependence of the deflection of the spatial truss on the number of panels
A statically definable girder truss consists of two flat side trusses with parallel belts and descending braces, connected along the upper and lower belt by horizontal ties. The truss at the corners has four supports, the vertical reaction of one of which is selected from the equilibrium condition…
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Destruction of powder-activated concrete with fixation of destruction by a laser interferometer
The article is devoted to the identification of the patterns of deformation and destruction of powder-activated concrete under the action of power loads. As research concrete, powder-activated concrete of a new generation was considered in comparison with materials of the old and transitional…
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Increased plasticity of nano concrete with steel fibers
High strength concrete or nano concrete, it is often brittle, so it is necessary to study the solutions to increase the plasticity to obtain the structure to ensure the bearing capacity. The main advantage of steel fibers concrete is that it makes concrete with high flexibility, high tensile and…
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Seismic design philosophy of special steel plate shear walls
Steel plate shear walls are usually designed by devoting total story shear to plates and designing peripheral frames for total transferred forces from the plates to the peripheral frames. Therefore, the participation of frames in the story shear neglected conservatively. In this research, a design…
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Efficiency and durability of the linings channels of geosynthetics
The investigation is concerned with seepage-control canal lining made of geosynthetic materials (GSM): polymer geomembranes and bentonitic mats (bentomats) with protective coatings. Efficiency and longevity criteria of lining made of geomembranes, bentomats and protective coatings (concrete, stone…
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Optimisation of steel trusses with a choice of multi-stage prestressing conditions
This paper presents a methodology for optimisation of flat steel trusses with a system of high-strength tie bars, for each of which the possibility of multiple pre-stresses is provided. Pre-stress is one of the most effective ways to increase the carrying capacity of steel trusses with minimum…
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Behavior of strengthened concrete beams damaged by thermal shock
In the last two decades, using of Carbon Fiber Reinforced Polymers (CFRP) in strengthening of deficient reinforced concrete structural elements has been increased due to their ease of installation, low invasiveness, high corrosion resistance, and high strength to weight ratio. Strengthening damage…
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Influence of silica fume on the pervious concrete with different levels of recycled aggregates
The world nowadays is trying to find alternative approaches to be used in manufacturing instead of consuming raw materials. Using recycled aggregates in new concrete is one of these effective approaches, which in turn reduces the quantity of waste and reduces the required landfills. In this present…
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Two-way patched RC slabs under concentrated loads
Damage that occurs in reinforced concrete elements can reduce the capacity and serviceability of these elements. One of the damages that may be encountered is spalling or delamination of concrete covers. Repairs to this type of damage can be carried out by patching methods. This research uses…
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Lightweight geopolymers made of mineral wool production waste
Reducing industrial slags and developing building materials on its basis is one of the priority areas for the development of the construction industry. The problem of obtaining cellular concrete from mineral wool production waste (lightweight geopolymers) is considered within the framework of the…
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Lightweight cement mortar with inorganic perlite microspheres for equipping oil and gas production wells
In this study lightweight cement mortar was researched. Low-density mortar is used for cementing high temperature, heavily watered oil and gas wells. ISO standard methods, X-ray diffraction analysis and electron microscopy confirm that hollow microspheres of perlite are an effective lightening…
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A probabilistic approach to estimation of the ultimate load of end-bearing piles on settlement criterion
Pile foundation is one of the most common types of foundations in the presence of soft soils. The safety of the entire structure depends on the pile foundation safety. Stochastic (probabilistic) modeling of load-bearing elements is a modern trend in the quantitative structural safety assessment…