ASSESSMENT OF RELIABILITY OF REINFORCED CONCRETE BEAMS IN ACTION OF SMALL-CYCLE REPEATS AND VARIABLE LOADS
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2017, Vol 169, Issue 3
Abstract
Example of calculating the reliability assessment of reinforced concrete beams under the actions repeated small cycle loads who work in different axis using experimental data. The estimates of beams reliability was used like the method of calculating the reliability of building structures under the action of single static loads. The difference between stress-strain state of reinforced concrete structures for the repeated cyclic bending action and stress-strain state of reinforced concrete beams under the long influence unambiguous static load was compare by experimental and theoretical research. Under the action of repeated cyclic alternating loads : beams carrying capacity is reduced by 5 to 25 percent; bending moment of crack appearance decrease threefold and the width of crack increased. Expose of that action influence depends of stress level and grade of concrete . Taking into account changes in the stress-strain state of the beams for action was repeated cyclic alternating loads covered in the issued recommendations. Since the parameters deflected mode of change be it the need to assess the reliability of such beams.
Authors and Affiliations
Grigoriy Masyuk
Keywords
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