Abstract. The construction industry has experienced the hugest number of changes during all century's history. Today in construction there is a huge set of scientific completions and innovative solutions that many times increase quality of works and process reliability of construction in general. This publication is devoted to an innovative element for strengthening building constructions and elements -to high-strength composite materials. Due to inevitable exhaustion of natural resources and increase in energy cost in the world the process of composite materials production in industrial is becoming more relevant, important and popular, such as fibreglass, basaltplastic, carbonoplastic. These composite materials possess sufficient characteristics on reliability, durability, profitability and that is the most importantenvironmental friendliness in comparison with the metal reinforcing elements. It is important that source replenishment of raw materials in modern production is possible due to processing of secondary raw materials and technogenic waste. Experience of using composite materials during strengthening building constructions, the comparative analysis from the point of ecology production and using materials, advantages of composite materials is reflected in this publication. The purpose of this publication is to show validity of using composite materials for strengthening building constructions from the point of view of reliability, profitability and also environmental friendliness in comparison with other reinforcing elements. IntroductionNowadays it is paid more attention to the problem of ensuring reliability of building elements in construction industry. The urgent need of carrying out high-quality construction works on exponentation of buildings and constructions, competent maintenance at all stages of construction and also carrying out timely repair and, if necessary, gain of constructions is the reason for that. First of all it is connected with the growing need to provide reliable maintenance of constructions because dismantling and changeover are much more expensive than repair or impossible at all. The purpose of this publication is to show validity of using composite materials for strengthening building constructions from the point of view of reliability, profitability and also environmental friendliness in comparison with other reinforcing elements. It should be noted that damages of reinforced concrete structures are, as a rule, connected with corrosion, an overload of separate elements, misuse, design errors and technology. Nowadays strengthening of building constructions with composite materials is the most reliable way of restoration and increasing in operational characteristics building constructions [1]. Considering the subject of strengthening it should be noted that throughout long time it is usually used steel reinforcement for concrete elements that has main shortcomings -corrosion of steel and conductivity. These facts have prompted researchers to improve quality of reinforcing so t...

Abstract. Properties of new reinforcing element -composite reinforcement, are considered. Feasibility study of using this material for modernization of buildings, namely for vertical extension with additional storey, is carried out. Comparative analysis of performance is conducted for metal and composite reinforcement, as well as calculations are performed which results will be used for determination of advantages and disadvantages of this innovative reinforcing method. An important factor for development of projects of building vertical extension after quite a long operation period is a proper selection of construction materials and strength analysis considering the structures to be erected. Calculation of a floor slab erected with using composite fiberglass reinforcement is represented. Results obtained in the calculation and the analysis of the data prove high efficiency of this reinforcing method through the decrease of loads on lower storeys of the building, economic feasibility and other factors.