OPTIMAL HEIGHT OF STEEL I-BEAMS WITH CHANGING THE WIDTH OF THE FLANGES

The article improves the methodological approach to finding best constructive solution for a beam made of welded steel I-beams with variable flange width. An idealized physicalmathematical model construction tapered depending on consumption and changes in geometric characteristics cross-section is described. bending strength conditions are taken as limitations. purpose research was develop an establish regularity rational variability width flanges elastic I-beam along its length.It shown that determining pattern stress-strain state beams shelf at constant height urgent task. As result optimal structure shown. A hasbeen established between parameter coordinate calculated section. effect displacement section direction decrease thebeams, degree length beam, has been confirmed. Thus, wall height, maximum stresses occur does not havethe characteristics.Analytical dependences were obtained. methodology search rationalconstructive It case flanges, depends load distribution unction beam.A cantilever-clamped studied. Through relative characteristics, it when parameterof changed, moves toward free end smaller characteristics.Corresponding numerical studies have carried out, which illustrated by graphs. conducted allows choosing theoptimal dimensions changing perceive moments. According results, cross-sectionis recommended designs Ibeams flanges.