Goals. To carry out experimental studies of enforcing the reinforced concrete bending elements with pre-stressed composite materials. Research Methods. Rectangular reinforced concrete elements ...enforced with polymer composite materials were used as laboratory samples, the measurement was carried out using strain gauges and analog indicators. Research results. A laboratory research program has been developed. The technology for enforcing the reinforced concrete samples by using pre-stressing of fibre-reinforced polymer has been developed. The results of experimental studies regarding the bearing capacity of laboratory reinforced concrete samples enforced with pre-stressed fibre-reinforced polymer are presented. The new enforcement technology was developed. It implies using a device patented by the authors, and the fundamentally new patterns for destruction of samples are presented. The impact of a various strip tension degree (12 kN compared with 6 kN) was analyzed, a difference of 31 % was determined for bearing capacity and 17% for the cracking resistance of reinforced concrete samples. Conclusions. The conducted analysis of the experimental study allows concluding that reinforcement with pre-stressed composite materials (bands) allows increasing the strength of the samples up to 70%, and also increases cracking resistance by 80 %.
Year after year the traffic density on general-purpose highways increases. Thus, actions on repairs, capital repairs or reconstruction of artificial structures are required to ensure safe ...uninterrupted transportation process. Currently, the issue of improvement of reliability indicators with regard to artificial structures on highways upon their construction and maintenance, with account for cost optimization on the basis of application of polymer composite materials, is topical. Polymer composite materials are plastics reinforced by high-strength fibers. Studies of experience in application of polymer composite materials in various industries of the Russian Federation and abroad have shown that it is necessary to look for new effective construction solutions for more widespread introduction and expansion of the field of application of composite materials in the practice of transport construction on highways.
PDF