TY JOUR TI THE STRENGTH AND THE CRACK RESISTANCE OF THE BENT REINFORCED CONCRETE TRAPEZOIDAL CROSS-SECTION ELEMENTS WITH THE WIDE LOWER BOUND KW strength KW crack resistance KW deformation calculation model KW concrete state diagram KW tension reinforcement diagram KW bent element KW a trapezoidal cross-section JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Obernihin, D.V. AU Nikulin, A.I. PY 2016 IS PB Belgorod State Technological University named after V.G. Shukhov