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)11218Research ArticleTREShchINY SO SVYaZYaMI V PERFORIROVANNOY STRINGERNOY PLASTINEMir-Salim-zadeM Vmir-salim-zade@mail.ruInstitute of Mathematics and Mechanics of NAS of Azerbaijan, Baku, Azerbaijan150520145344412092016Copyright © 2016, Structural Mechanics of Engineering Constructions and Buildings2016An unlimited perforated plate, reinforced by a regular system of ribs is considered. Plate weakened by a periodic system of surface cracks. The model of a crack with end zones in which crack surfaces interact is used. The boundary value problem for the equilibrium of the periodic system of cracks is reduced to a singular integral equation. The condition of the limit equilibrium cracks is formulated taking account to the criterion of the limit traction of bonds.perforated reinforced platestringersperiodic system of crackscracks with interfacial bondsперфорированная усиленная пластинастрингерыперио- дическая система трещинтрещины со связями между берегами