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Traditional steel reinforcement does not resist corrosion and its resources are limited; therefore, carbon, glass, aramid and basalt fibre reinforced polymer bars were developed. The composite reinforcement has a high tensile strength and resistance to electromagnetic fields. Different kinds of materials and application of various surface coatings are used in the production of the composite bars. This results in different adhesion to concrete and mechanical properties of composite bars. In comparison with steel reinforcement, glass, aramid and basalt fibre reinforced polymer bars have a lower modulus of elasticity. Thus, structural rigidity provided by these bars is smaller in respect to reinforced concrete elements. Current reinforced concrete design codes and recommendations are based on empirical and simplified methods of strain evaluation, which may be inadequate for design of structures with composite bars. In this paper, an adequacy of the empirical models was checked against the experimenta...

engineering structures and technologies

ACCURACY ANALYSIS OF DESIGN METHODS FOR CONCRETE BEAMS REINFORCED WITH FIBER REINFORCED POLYMER BARS / KOMPOZITAIS ARMUOTŲ BETONINIŲ ELEMENTŲ PROJEKTAVIMO METODŲ TIKSLUMO ANALIZĖ