TY JOUR TI MATHEMATICAL MODELING OF BUILDING STEELWORK FLAT FRAME DEFORMATION AT EMERGENCY OCCURRENCE AS LOCAL DESTRUCTION KW JO Bulletin of Bryansk state technical university AU Serpik, I.N. AU Kurchenko, N.S. AU Obozov, A.A. AU Reutov, A.A. AU Sakalo, V.. PY 2017 IS 2017 PB Bryansk State Technical University