Features of Behavior of Flexural Members with Composite Polymeric Reinforcement under Load

The article presents the results of experimental studies of strength, crack resistance of normal sections and deformability of flexural members reinforced with composite reinforcement. The study used bars of glass-composite and basalt-composite reinforcement, with pre-tensioning including. The beam specimens were subjected to the short duration loads. According to the results of the tests, cracking loads, the achievement of limit states for deflections and the width of cracks opening, fracture have been established. The dependence of the crack formation moment on the diameter of type of reinforcement has been revealed. Operation of beams under load after cracking and till failure is characterized by mostly linear dependence between the values of bending moments and deflections.Four mechanisms of destruction of beams were recorded. It is established that that the serviceability limit states come at 26.1–52.9% of rupture load, for beams with pre-stressed composite reinforcement – 42.3–70.3%. More efficient is the use of bars of smaller diameter.

I.A. ANTAKOV, assistant (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Kazan State University of Architecture and Engineering (1, Zelenaya Street., Kazan, 420043, Republic of Tatarstan, Russian Federation)

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