Structural Mechanics Aspect of Strength of Composite Reinforcement

Abstract

When operating in wet and corrosive conditions, composite reinforcement is in some cases an effective substitute for the suitable steel reinforcement. However, many questions related to its design, production and operation are insufficiently studied. The aim of the work is to create a methodology and carry out a comparative structural and mechanical analysis of strength indexes when working under load of coils and a bar of composite construction reinforcement. A method has been developed for analyzing the loading capacity of composite reinforcement according to the criteria of strength at rupture of a bar, as well as shear strength and bearing strength of its braid coils. Analytical and numerical modeling of conditions of equal strength of structural elements of composite construction reinforcement was carried out. Theoretically substantiated the assumption of a relatively low loading capacity of the braid coils in comparison with the loading capacity of the reinforcement bar. A predictive estimate of the conditions for ensuring the uniform strength of the bar for breaking and braid coils for shear and crushing by the method of lower estimation (for the minimum values of strength) has been carried out using the example of composite reinforcing bars produced by the industry of Republic of Belarus. In conclusion, results of work are formulated and it is noted that the results can be used by manufacturers and consumers of construction composite reinforcement, also in the educational process in the training of engineering personnel for the construction profile.

Influence of the binder technological shrinkage on the strength of composite reinforcement

“…In many scientific and research and production -research centers of the Republic of Belarus [1 -6], the Russian Federation [7 -9] and other countries [10 -20] research and development are carried out aimed at creating a modernization of the structure, manufacturing technology and test methods of construction composite reinforcement not only on the basis of the most economical and already traditional glass and basalt fibers [12 -14]. Hybrid composites are also being created which additionally include along with glass, carbon, aramid, or metal fibers [10,[15][16][17][18][19][20][21][22][23]. However despite the progress made many issues affecting the strength of products are insufficiently studied which is the main constraining factor in the establishment of scientifically based standards for assigning mechanical characteristics, control and testing methods [7,8].…”