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DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Simulation of fatigue damagesin secondary truss of crane

  • Eremin Konstantin Ivanovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Testing of Structures, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe Shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Shul’ga Stepan Nikolaevich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Testing of Structures, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe Shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 30-38

Basing on the damaging statistics obtained during the on-site inspections of industrial multi-span building structures with under-crane secondary trusses which have continuous lower plinth, we simulated the scenario of the most likely damage development of under-crane secondary trusses.The first scenario is the development of cracks along the total cross section of plinth. In the process of calculations we defined a real deformation scheme of plinth of under-crane secondary trusses with damage and its stress condition.The second scenario is the destruction of a support or support mounting unit to the lower plinth of under-crane secondary trusses. The destruction of this kind can occur as a result of a crack in a support or as a result of destruction of high-strength fasteners of a support to plinth. We discovered that a system with such damage is geometrically unchanged; there is no possibility of sudden destruction of both the under-crane secondary trusses and the entire building frame.The third scenario is the upper plinth separation from one of the walls of lower plinth of under-crane secondary trusses.The scenario is developed to define the viability of under-crane secondary trusses as a result of cracks in the area of wall junction with the upper shelf of lower plinth, their further development and the appearance of discrete cracks developing into a backbone along the entire span length of under-crane secondary trusses.Based on the calculations of the stress strain state of under-crane secondary trusses with damages in the emergency nature in a separate span of the lower plinth and a truss member, we estimated the viability of structure. The analysis of viability limits makes it possible to find the measures of collapse preventing and avoid possible victims.

DOI: 10.22227/1997-0935.2014.2.30-38

References
  1. Eremin K.I., Shul’ga S.N. Napryazhenno-deformirovannoe sostoyanie uzlov podkranovo-podstropil’nykh ferm [The Stress-strain State of the Knots of Crane Farms]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2012, no. 6, pp. 40—43.
  2. Eremin K.I., Shul’ga S.N. Zakonomernost' povrezhdeniy podkranovo-podstropil'nykh ferm na stadii ekspluatatsii [Regularity of the Damages of Crane Secondary Trusses During their Exploitation]. Promyshlennoe I grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2013, no. 4, pp. 27—29.
  3. Pinto J.M.A., Pujol J.C.F., Cimini C.A. Probabilistic Cumulative Damage Model to Estimate Fatigue Life. Fatigue & Fracture of Engineering Materials & Structures. 2013, vol. 37, no. 1, pp. 85—94. DOI: 10.1111/ffe.12087.
  4. Fell B.V., Kanvinde A.M. Recent Fracture and Fatigue Research in Steel Structures. STRUCTURE magazine. 2009, no. 2, pp. 14—17.
  5. Artyukhov V.N., Shcherbakov E.A., Goritskiy V.M., Shneyderov G.R. O sostoyanii podkranovykh konstruktsiy korpusa konverternogo proizvodstva OAO «Severstal'» [On the Crane Secondary Truss State of the Body Structure of Converter Process in «Severstal’»]. Promyshlennoe I grazhdanskoe stroitel’stvo. [Industrial and Civil Engineering]. 2001, no. 6, pp. 31—34.
  6. Br?ckner A., Munz D. Prediction of Failure Probabilities for Cleavage Fracture from the Scatter of Crack Geometry and of Fracture Toughness Using Weakest Link Model. Engineering Fracture Mechanics. 1983, vol. 18, no. 2, pp. 359—375. DOI: 10.1016/0013-7944(83)90146-7.
  7. Kawasaki T., Nakanishe S., Sawaki I. Tangue Crack Growth. Engineering Fracture Mechanics. 1975, no. 3, pp. 12—18.
  8. Smith I.F.C., Smith R.A. Defects and Crack Shape Development in Fillet Welded Joints. Fatigue of Engineering Materials and Structures. 1982, vol. 5, no. 2, pp. 151—165. DOI: 10.1111/j.1460-2695.1982.tb01231.x.
  9. Robin C., Louah M., Pluvinage G. Influence of an Overload on the Fatigue Crack Growth in Steels. Fatigue and Fracture of Engineering Materials and Structures. 1983, vol. 6, no. 1, ðð. 1—13. DOI: 10.1111/j.1460-2695.1983.tb01135.x.
  10. Shuter D.M., Geary W. Some Aspects of Fatigue Crack Growth Retardation Behaviour Following Tensile Overloads in a Structural Steel. Fatigue and Fracture of Engineering Materials and Structures. 1996, vol.19, no. 2—3, pp.185—199. DOI: 10.1111/j.1460-2695.1996.tb00958.x.

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