Structural Mechanics of Engineering Constructions and BuildingsStructural Mechanics of Engineering Constructions and Buildings1815-52352587-8700Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)10963ERKhOV MIKhAIL IVANOVICh---150420124808012092016Copyright © 2016, Structural Mechanics of Engineering Constructions and Buildings2016