Today there are many scientific and technical knowledge that make construction a reliable, fast and economical. To provides a safe and durable (the fundamental components of reliability) of builnings and structures are developed the methods of reliability theory. Improving the methods of calculation is enables researchers and designers to create effective structures with a preset (expedient) level of reliability, which directly affects to an amount of required materials and, appropriately, a cost of future building objects in general. In this paper the simple analytical method of calculation of indexes for assessing of reliability of reinforced concrete (RC) beams, strengthened with additional reinforcement bars is proposed. The developed method takes into account with a sufficiently high accuracy the number of the stochastic parameters (factors), based on the experimental data of previous investigations, and in any case affects on the actual work of RC structures during their operation. In addition, the list of scientific publications and normative literature, used in writing this article, is posted.
1. Konstruktsii budynkiv i sporud. Betonni ta zalizobetonni konstruktsii. Osnovni polozhennia [Construction of houses and buildings. Concrete and reinforced concrete structures. The main provisions]. (2011). DBN V.2.6-98:2009 from 1th July 2011. Kyiv: Building norms of Ukraine [in Ukraine]. 2. Eurocode: Basis of structural design. EN 1990:2002. – Brussels: European Committee for Standardization (CEN), 2002. – 87 p. 3. Systema zabezpechennia nadiynosti ta bezpeky budivelnyh obiektiv. Zakhalni pryncypy zabezpechennia nadiynosti ta konstruktyvnoi bezpeky budivel, sporud, budivelnykh konstruktsiy ta osnov [System of providing of reliability and safety of structural objects. General principles of providing of reliability and constructive safety of buildings, structures, building constructions and foundations]. (2009). DBN V.1.2-14-2009 from 1th December 2009. Kyiv: Building norms of Ukraine [in Ukraine]. 4. Pichugin S. F. Nadozhnost stalnykh konstruktsyy proizvodstvennykh zdaniy: Monographia [Reliability of Steel Structures of Industrial Buildings: Monograph]. – M.: Publishing house ASV, 2011. – 456 p. 5. Pshenichkina V. A. Nadozhnost sroitelnykh sistem: uchebnoe posobie [Reliability of building systems: tutorial] / V. A. Pshenichkina, A. N. Bogomolov, A. A. Churakov. – Volgograd: VolgGASU, 2010. – 40 p. 6. Wang N. Y. Reliability-Based Evaluation of Flexural Members Strengthened with Externally Bonded Fiber-Reinforced Polymer Composites / N. Y. Wang, B. R. Ellingwood, A. H. Zureick // Journal of Structural Engineering-ASCE. – 2010. – Vol. 136. – P. 1151–1160. 7. American Concrete Institute (ACI) ACI 318-05: Building code requirements for reinforced concrete. – ACI, Farmington Hills, MI, 2005. – 369 p. 8. Trentin C. Safety factors for CFRP strengthening in bending of reinforced concrete bridges / C. Trentin, J. R. Casas // Composite Structures. – 2015. – Vol. 128. – P. 188–198. 9. Karbhari V. M. Design factors, reliability, and durability prediction of wet layup carbon/epoxy used in external strengthening / V. M. Karbhari, M. A. Abanilla // Composites Part
B: Engineering. – 2007. – No. 1, Vol. 38. – P. 10–23. 10. Alsayed S. H. Reliability of shear-deficient RC beams strengthened with CFRP-strips / S. H. Alsayed, N. A. Siddiqui // Construction and Building Materials. – 2013. – Vol. 42. – P. 238–247.