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- BUILDING STRUCTURES, BUILDINGS AND FACILITIES
- To the Issue of Dynamic Loading of Reinforcement with Instantaneous Formation of a Spatial Crack in Reinforced Concrete Structure under the Action of Torsion with Bending
- UDC 624.012.4.046
Alexey I. DEMYANOV1, e-mail: vlik52@mail.ru
Vladimir I. KOLCHUNOV1, e-mail: vlik52@mail.ru
Igor A. YAKOVENKO2, e-mail: i2103@ukr.net
1 Southwest State University, ul. 50 let Oktyabrya, 94, Kursk, 305040, Russian Federation
2 National Aviation University, prosp. Kosmonavta Komarova, 1, Kiev 03058, Ukraine
Abstract. It is proposed the computational model of the dynamic loading in working longitudinal and transverse reinforcement from the instantaneous formation of a spatial crack in the stretched concrete of a reinforced concrete structure, which occurs with a complex resistance under the action of torsion with bending. In this case, the bilinear surface simulating the spatial crack is replaced by a grid of square elements, which allowed us to write analytical formulas for determining the component forces in the concrete of each grid square, along coordinate axes. Dependences are obtained for the determination of dynamic stresses in a stretched working reinforcement in a cross-section with a spatial crack, taking into account the gravity forces. The application of the problem on the intersection is substantiated by the plane of a spatial crack of the cylinder. The simulation of the working armature is performed, using that cylinder. It is proposed an analytic expression of the second-order figure in the form of an ellipse and a formula for determining its area are obtained. The calculation dependencies and algorithms for calculating individual parameters are constructed that allow to determine all the components of the dynamic loading of reinforcement from the instantaneous formation of a spatial crack that occurs when the reinforced concrete element has a complex resistance under the action torsion with bending.
Key words: bilinear surface, dynamic loading, emergence of cracks, torsion with bending, reinforced concrete structures. - REFERENCES
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