DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

EXPERIMENTAL STUDY OF THE BEARING CAPACITY OF SPATIAL METAL FRAMES

Vestnik MGSU 5/2012
  • Serpik Igor' Naftol'evich - Bryansk State Technological Academy of Engineering Doctor of Technical Sciences, Professor, Chair, Department of Mechanics, Bryansk State Technological Academy of Engineering, 3 Stanke Dimitrov Prospect, Bryansk, 241037, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Alekseytsev Anatoliy Viktorovich - Bryansk State Technological University of Engineering (BSTU) Candidate of Technical Sciences, Associate Professor, Department of Construction Operations, Bryansk State Technological University of Engineering (BSTU), 3 prospekt Stanke Dimitrova, Bryansk, 241037, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 40 - 44

In the article, the authors describe the principal findings of the experimental study of destruction of spatial frames made of closed-profile steel rods. Six samples of frames were tested through the application of a kinematic loading scheme. Values of forces, displacements and deformations were measured over the time. Each sample was brought to the state when the load reached its maximal value. Thereafter, the load intensity was reduced to 0.6...0.7 of its maximal value. It was identified that the destruction of rods in the event of combined stress was similar to the formation of plastic hinges in the course of regular bending. In some cases, cracks were formed in the zones of plastic hinges. This process did not cause complete destruction of frames.
Destruction-related conditions were also assessed by the quasi-rigidity method implemented in STARK ES 2009 software package. The input data were used to perform failure, bending and torsion tests of steel pipes. The experiments and calculations have proven that in this case the process of destruction can be considered in accordance with the limit equilibrium method by taking account of formation of spatial plastic hinges. The quasi-rigidity method can be employed to identify the maximal load that the frames can bear.

DOI: 10.22227/1997-0935.2012.5.40 - 44

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