Ametov Y. Impact of loading regime and continuous keeping under loading on bearing capacity of reinforced concrete beams

Paper is devoted to the development of analytical device, which is theoretically reasonable and experimentally tested taking into account the strength of reinforced concrete flexible structures at short-term loading performance and additional loading after continuous staying under loading. Input calculation conditions are stated and grounded, based on which the calculation device for evaluation of strength of standard crossings of reinforced concrete flexible structures at short-term loading and additional loading after continuous staying under loading is developed. For all operation stages of reinforced concrete flexible structures the algorithm of calculation is developed. Experimental investigations of loading character impact on bearing capacity of reinforced concrete beams is performed. Experimental evaluation of impact of crossing geometry and testing duration on boundary strains of edge compressed fiber of concrete in reinforced concrete beams is performed. Recommendations for determinationof calculated values of strength and strain material properties, which are used in calculation device, are made. Work results were applied at design of reinforced concrete floor of machine shop of glass receptacle plant "Vostok-Steklo" in Syomipalatynsk city (Kazakhstan) and at reconstructions of analogical shops of a number of plants in Ukraine and Moldova as well.