Translation. Region: Russian Federal
Source: Saint Petersburg State University of Architecture and Civil Engineering –
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As part of the grant competition for the implementation of research work by scientific and pedagogical staff of SPbGASU, laboratory tests of full-scale reinforced concrete beams reinforced with an external reinforcement system made of composite materials have been completed in the interdepartmental laboratory of our university.
Reinforcement with external reinforcement made of composite materials allows to increase the load-bearing capacity, reduce deflections and crack width without increasing the mass of the reinforced structure.
The tests were carried out by senior lecturer of the Department of Reinforced Concrete and Stone Structures Anastasia Denisova and senior laboratory assistant of the interdepartmental laboratory Egor Kuzhman under the scientific supervision of associate professor of the Department of Reinforced Concrete and Stone Structures Alexey Shekhovtsov.
The purpose of the tests was to evaluate the work of reinforced structures at different stages taking into account the loading history. Three precast reinforced concrete beams of rectangular cross-section with dimensions of 300×400 mm, length of 3300 mm, weight of 1 t were tested.
First, beams were tested without reinforcement to simulate the operation of the structure during the operational phase. The sample was not brought to failure at this stage. Then, the beams were reinforced with external reinforcement and the reinforced beams were tested again until complete failure, simulating the operation of the structure after reinforcement during the operational phase.
During the tests, the researchers monitored the vertical displacement of the sample, the relative deformations of the concrete and composite material, the width of the crack opening, the loads of crack formation, destruction, the pattern of crack formation, the nature of destruction, etc.
The research is an important stage in assessing the effectiveness of modern methods of strengthening reinforced concrete structures and in developing methods for their design, and also allows obtaining data for the further implementation of these technologies in construction practice.
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