DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

ANALYSIS OF SUFFICIENCY OF THE BEARING CAPACITY OF BUILDING STRUCTURES OF OPERATING SITES OF MAIN BUILDINGS OF THERMAL POWER PLANTS

Vestnik MGSU 3/2012
  • Alekseeva Ekaterina Leonidovna - Moscow State University of Civil Engineering (MSUCE) postgraduate student, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 25 - 29

Upon examination of eleven main buildings of power plants, analysis of defects and damages of building structures was performed. Thereafter, the damageability of principal bearing structures of main buildings of thermal plants was analyzed. It was identified that the fastest growing defects and damages were concentrated in the structures of operating sites. The research of the rate of development of the most frequent damages and defects made it possible to conclude that internal corrosion of the reinforcing steel was the most dangerous defect, as far as the reinforced concrete elements of operating sites were concerned. Methods of mathematical statistics were applied to identify the reinforcing steel development pattern inside reinforced concrete elements of floors of operating sites. It was identified that the probability of corrosion of reinforced concrete elements of operating sites was distributed in accordance with the demonstrative law. Based on these data, calculation of strength of reinforced concrete slabs and metal beams was performed in terms of their regular sections, given the natural loads and the realistic condition of structures. As a result, dependence between the bearing capacity reserve ratio and the corrosion development pattern was identified for reinforced concrete slabs and metal beams of operating sites. In order to analyze the sufficiency of the bearing capacity of building structures of operating sites in relation to their time in commission, equations were derived to identify the nature of dependence between the sufficiency of the bearing capacity of reinforced concrete slabs and metal beams of the operating sites and their time in commission.

DOI: 10.22227/1997-0935.2012.3.25 - 29

References
  1. Dobromyslov A.N. Diagnostika povrezhdeniy zdaniy i inzhenernykh sooruzheniy [Damage Diagnostics of Buildings and Engineering Structures]. Moscow, MSUCE, 2008.
  2. Kuznetsov I.P., Ioffe Y.R. Proektirovanie i stroitel’stvo teplovykh elektrostantsiy [Project Design and Construction of Heat Power Plants]. 3rd revised edition, Moscow, Energoatomizdat Publ., 1985.
  3. Kuznecov I.P., Ioffe Ju.R. Rukovodstvo po ekspluatatsii stroitel’nykh konstruktsiy proizvodstvennykh zdaniy promyshlennykh predpriyatiy [Guidelines for Operation of Building Structures of Production Buildings of Industrial Enterprises]. 4th reprint edition, Moscow, 2004.

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THE PROTECTABILITY OF BLOCK COVERINGS OF INDUSTRIAL BUILDINGS WITH DEFECTIVE LOAD-BEARING STRUCTURES FROM PROGRESSIVE COLLAPSE

Vestnik MGSU 9/2015
  • Harutyunyan Gevorg Harutyunovich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Scientific and Educational Center “Test of Structures”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 16-27

Beginning with the 20th century metal structures are widely used in the construction branch in Russia. The reason for it was in the development of calculation methods of structures. Beginning with 1930 and till now a substantial number of the industrial buildings (about 90 %) of production plants have been built of metal structures. The essential part of them - 20…60 % of the whole volume - has block coverings consisting of bearing and braced elements. At the present time the data on the operation duration of industrial structures is not systemized throughout Russia. This data may serve as one of characteristic factors for estimating safety operation level, because while the operation term increases, the wear also increases (mechanical damages), which influences the bearing capacity of the structures. The following article examines the collapse of industrial building coverings that may be accompanied not only by material losses, but also by fatal accidents. Statistical data of damageability of trusses and their elements are presented; the consequences of collapse are examined. The average life time of trusses is determined which is serving as a criteria that characterizes damage accumulation. The nature of the collapse of block coverings is revealed which, in most cases, may be classified as progressive.

DOI: 10.22227/1997-0935.2015.9.16-27

References
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