TY JOUR TI Prerequisites for accounting of fiber reinforcement when calculating normal sections of fibrorubcon beams KW rubcon KW fiber KW fibrorubcon KW beam KW normal cross-sections KW rectangular cross-section KW bending element KW strength JO Construction and Architecture AU Polikutin, A.E. AU Potapov, Y.B. AU Levchenko, A.V. PY 2019 IS 7 PB Publishing Center RIOR