DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

PREDICTION OF MAXIMUM CREEP STRAIN OF HIGH PERFORMANCE STEEL FIBER REINFORCED CONCRETE

Vestnik MGSU 12/2012
  • Mishina Alexandra Vasil'evna - Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS) postgraduate student, Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS), 21 Lokomotivnyy proezd, Moscow, 127238, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Bezgodov Igor' Mikhaylovich - Moscow State University of Civil Engineering (MSUCE) Researcher, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Andrianov Aleksey Aleksandrovich - Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS) Candidate of Technical Sciences, Senior Researcher; +7 (495) 482-40-18, Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (NIISF RAACS), 21 Lokomotivnyy proezd, Moscow, 127238, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 66 - 70

The strongest research potential is demonstrated by the areas of application of high performance steel fiber reinforced concrete (HPSFRC). The research of its rheological characteristics is very important for the purposes of understanding its behaviour. This article is an overview of an experimental study of UHSSFRC. The study was carried out in the form of lasting creep tests of HPSFRC prism specimen, loaded by stresses of varied intensity. The loading was performed at different ages: 7, 14, 28 and 90 days after concreting. The stress intensity was 0.3 and 0.6 Rb; it was identified on the basis of short-term crush tests of similar prism-shaped specimen, performed on the same day. As a result, values of ultimate creep strains and ultimate specific creep of HPSFRC were identified. The data was used to construct an experimental diagramme of the ultimate specific creep on the basis of the HPSFRC loading age if exposed to various stresses. The research has resulted in the identification of a theoretical relationship that may serve as the basis for the high-precision projection of the pattern of changes in the ultimate specific creep of HPSFRC, depending on the age of loading and the stress intensity.

DOI: 10.22227/1997-0935.2012.12.66 - 70

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