Belash T.A.
Belash T.A.

Belash T.A.
д-р техн. наук, профессор, зав. кафедрой «Здания» ФГБОУ ВПО ПГУПС


Publications

Use of Seismic Isolation under Complexes of Close Standing Buildings
Issue: №3 2019
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This article analyzes the existing solutions for applying special seismic protection to building complexes. The PSTU developed at the “Buildings” department designed model for a number of buildings in a seismic region in the North Caucasus with seismic isolation, made in the form of rubber-metal supports. Preliminary structural calculations have been performed showing that the use of such a seismic protection system helps to reduce the load on the building while saving money on seismic strengthening.

Analysis of the Damage of the Architectural Monuments of Syria Resulted From Earthquakes and Hostilities
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This article discusses the analysis of damage received, architectural monuments on the territory of Syria: Castle of Krak des Chevaliers; the Great Umayyad Mosque in Aleppo; the Great Mosque in Maarat al-Numan; Triumphal Arch in Palmyra, Colonnade street in Palmyra; Mosque Omar in Bosra as a result of past earthquakes and the fighting that began in 2011. 

The Effective Use of Structural Systems of Buildings With Suspended Structures
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The article presents the results of studies the buildings suspended type in seismic areas. The study contains a comparative analysis of various constructive schemes. Then it was revealed the best option and made a trial design of a suspended type of building. Calculations were performed in software and computing complex SOFiSTiK, based on the finite element method. The study showed that the use of suspension systems can significantly reduce the load on the building structure of the seismic action. Suspended buildings have both advantages and some of the features that complicate its construction. 

Researches in the Field of Aseismic Construction at the Petersburg State University of Means of Communication
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Article is devoted to the 150 anniversary of  «Buildings» chair and the 120 anniversary of «Theoretical Mechanics chair» of FGBOU VPO PGUPS Imperator of Alexander I. The main scientific achievements in the field of aseismic construction executed at university are presented.

Results of researches are analyzed in a chronological order. The assessment of settlement and theoretical researches in the field of seismic stability of buildings and various transport constructions, including bridges is given. It is featured questions of studying of seismoisolation. The contribution of scientists of university to development of aseismic construction is shown.

Practical value of the presented analysis consists in possibility of its use by the beginning young scientists, engineers dealing with issues of construction of buildings and constructions in regions of high seismic activity.

About Possibility of Use of the High Pile Grillage as the Seismoisolation Element for the Buildings Built in Permafrost Regions
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Research of buildings in permanent frost area shown that using of the I principle of building is an acceptable way to secure constructions. The high pilework is common and an acceptable way of realization of the I principle. Besides, high pilework make functions of seismic isolation. Researchings of buildings with high pilework in 7, 8, 9 point seismic areas show that increasing of «free» length of pile increase period of oscillations. This decrease seismic load, but increase square of reinforcement. Acceptable section for 7-point area is 40x40 cm for reinforced piles. In higher than 7-point areas using other different constructions of piles or dampers is required.      

About Intensity of Fluctuations of Construction Designs of «Wet» Storage of Spent Nuclear Fuel at the Earthquake
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Pools for the long term storage of spent nuclear fuel are extremely dangerous buildings. Their seismic resistance is very important and topical theme. Design feature of such structures is the presence of a rigid bottom and flexible frame top, which is most vulnerable to earthquakes.

The article considers the influence of various factors on the intensity of the vibrations of flexible frame top оf VVER-1000 spent nuclear fuel repository during earthquake. These factors are: soil stiffness, frequency composition of the initial impact and functioning capacity of repository.

Antiseismic Foundation for Permanent Frozen Areas
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The I principle of building in permanent frozen and seismic zones is viewed. The I principle is realized by using of high pilework. The special frictional damper is installed between foundation piles. Different constructive solutions of frictional dampers are presented. Behavior resolution of buildings with accepted antiseismic system is given too.

About the impact of damage to building structures of existing "wet" storage of spent nuclear fuel at its seismic resistance
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Pools for the long term storage of spent nuclear fuel are extremely dangerous buildings. Their seismic resistance is very important and topical theme. Design feature of such structures is the presence of a rigid bottom and flexible frame top, which is most vulnerable to earthquakes.

This article presents the results of a study of the effect of damages of building structures of the existing "wet" storage of spent nuclear fuel at its earthquake resistance

Increasing the seismic resistance of operated buildings using special seismic protection methods
Issue: #3 2021
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The change in the level of seismicity of buildings and structures occurs as a result of updating the maps of general seismic zoning. Ensuring the seismic resistance of buildings and structures is a factor that must be taken into account, especially during construction in seismically active regions. Nowadays, one of the main approaches to increasing seismic resistance is the use of various seismic isolation systems. It is not always profitable and rational to increase the seismic resistance of building structures or foundations for equipment by simply increasing the strength. A classification of seismic reinforcement systems is given, among which the most sparing are special methods of seismic protection in the form of seismic isolation. Practical examples of the use of seismic isolation systems to improve the seismic resistance of existing buildings are given. A computational study was carried out, the result of which showed the effectiveness of using rubber-metal supports for hanging the seismic resistance of buildings.