DOI: 10.5937/jaes14-7104
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions.
Volume 14 article 381 pages: 285-289
Steel lattice
structures are characterized by presence of zones with constructive stress
concentrations and initial technological defects, which usually occur in a
result of hand welding. High level of relative loading typical for steel
structures, stress concentration and various defects in the weld zones lead to
crack initiation. Analysis of building structures failure has shown that from
more than 164 steel structure failures that have occurred in 2001-2010, the
lattice structures account for more than 64% of total failures. Earlier
performed investigations found that approximately 65% of the failures are
caused by development of cracks from welding defects, 10% by the initial crack
of cyclic origin, 25% - by high stress concentration. Therefore the design of
lattice structures without considering the peculiarities of deformation and
fracture of steel in zones of stress concentration leads to increased
probability of fatigue and quasibrittle failure. The present paper investigates
behavior of welded joints out of equal angles. Numerical and experimental studies
of stress–strain state in the region of crack tip located in the cross section
of gusset plate breakage were performed. The functional dependence was obtained
that characterizes shape, finite dimensions of element, loading scheme and
allows defining the stress intensity factor in the investigated section.
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O.V., Bultykov, A.V., Shuvalov, A.N. (2012): Influence of Design Parameters of
Elements Welded of Double Angles on the Level of Stress Concentration of
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