DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Deformation-inducedheating of shifted plates having structural defects

Vestnik MGSU 9/2013
  • Moyseychik Evgeniy Alekseevich - Novosibirsk State Universityof Architecture and Civil Engineering (NSUACE (Sibstrin)) Candidate of Technical Sciences, Associate Professor, Doctoral Student, Department of Metal and Wooden Structures, Novosibirsk State Universityof Architecture and Civil Engineering (NSUACE (Sibstrin)), 113 Leningradskaya str., Novosibirsk, 630008, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Shafray Sergey Dmitrievich - Novosibirsk State Academy of Architecture and Arts (NGAHA) Doctor of Technical Sciences, Professor, Department of buildig production, Novosibirsk State Academy of Architecture and Arts (NGAHA), 38 Krasnyy prospekt, Novosibirsk, 930099, Russian Federation;; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 7-15

The article is based on the authors’ experimental research into dependence between destruction of plates made of low-carbon structural steel, if loaded along their outer edge by the shearing force, whereby the loading is accompanied by deformationinduced heat generation. The authors provide more accurate data on the influence of patterns of particular structural defects on heat generation and initiation of destruction.The experiments conducted by the authors have proven that structural defects of shifted structural elements cause localization of deformations in the zone of defects, whereas the average temperature of the steel surface in the zone of defects may go up by several dozens of degrees and predetermine initiation and development of the seat of destruction in the place exposed to shear forces.Structural defects of shifted elements of structures cause localization of deformations in the zones of defects, especially in the event of elastoplastic and plastic behaviour of steel, while the average temperature of the steel surface exposed to deformations may increase by several dozens of degrees and pre-determine the pattern for development of destructions.

DOI: 10.22227/1997-0935.2013.9.7-15

References
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  2. Ostrikov G.M., Maksimov Yu.S. Stal'nye seysmostoykie karkasy mnogoetazhnykh zdaniy [Earthquake-resistant Steel Frames of Multi-storied Buildings]. Kazakhstan, Alma-Ata, 1985, 120 p.
  3. Moyseychik E.A. Issledovanie teploobrazovaniya i zarozhdeniya razrusheniya v stal'noy rastyanutoy plastine s konstruktivno-tekhnologicheskim defektom [Research into Heat Generation and Initial Destruction of a Stretched Steel Plate Having a Structural Defect]. Prikladnaya mekhanika i tekhnicheskaya fizika [Applied Mechanics and Applied Physics]. 2013, no. 1, pp. 134—142.
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  6. Pasternak H., M?ller L. Thermovision — Entwicklung eines neuen Verfahrens zur Dehnungsanalyse beanspruchter Stahlbauteile. Stahlbau, 2002, 71, no. 7, pp. 523—536.
  7. Pasternak H., M?ller L. Untersuchung des thermospastischen Verhaltens verschiedener Baustoffe mit Hilfe der Thermovision. Bauingenieur, 2003, 78, pp. 221—230.
  8. Weichert R., Schoenert K. Heat Generation at the Tip of a Moving Crack. J. Mech. Physics Solids, 1978, no. 26, pp. 151—161.
  9. Shafray S.D., Sergeev A.V. Sinergeticheskiy podkhod k opisaniyu kvazikhrupkogo razrusheniya stal'nykh konstruktsiy [Synergetic Approach to Description of Quasi-fragile Destruction of Steel Structures]. Izv. vuzov. Stroitel'stvo i arkhitektura [News of Institutions of Higher Education. Construction and Architecture] 1990, no. 8, pp. 11—15.
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DRINKING WATER PURIFICATION FROM STRONTIUM BY THE FILTRATION METHOD USING CLINOPTILOLITE

Vestnik MGSU 4/2017 Volume 12
  • Shcherbakov Vladimir Ivanovich - Voronezh State Technical University (VSTU) Doctor of Technical Sciences, Professor of Department of Hydraulics, Voronezh State Technical University (VSTU), 14 Moscow Avenue, Voronezh, Russian Federation, 394026.
  • Al'-Amri Zaed Sadik Abrahem - Voronezh State Technical University (VSTU) Graduate Student of Department of Hydraulics, Water Supply and Water Disposal, Voronezh State Technical University (VSTU), 14 Moscow Avenue, Voronezh, Russian Federation, 394026.
  • Mikhaylin Aleksey Viktorovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Senior Lecturer of the Department of Water Supply and Water Disposal, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, Russian Federation, 129337.

Pages 457-463

At present, the term “water hardness” is used to describe the total concentration of calcium, magnesium, and strontium in equivalent terms. Strontium is close to calcium by its chemical properties but differs from it dramatically by the biological effect. Long-term use of water with an increased content of strontium (Sr) leads to the development of various diseases among the population. Especially, it is dangerous for children. Strontium refers to the sanitary-toxicological hazard class by the limiting harmfulness indicator. The aim of the studies was to determine the effectiveness of stable strontium sorption on clinoptilolite in conditions of increased groundwater hardness. Based on experimental studies on the laboratory clinoptilolite filter, the output dependences of the residual concentration of hardness and strontium in the filtrate on the relative volumes of the filtrated water were plotted. As a result of the research, positive results of application of clinoptilolite of Kholinsky deposit were obtained.

DOI: 10.22227/1997-0935.2017.4.457-463

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