Reinforcement of concrete principal and secondary trusses after service damages

The paper studies reinforced concrete principal and secondary trusses of a one-floor industrial building made as a precast reinforced concrete frame. The aim of the work is to restore the serviceability of reinforced principal and secondary trusses after instrumental examination with regard to the detected significant corrosion damage of reinforcement and longitudinal cracks in the protective concrete layer with opening width of several millimeters. After the analysis of the building structural scheme, its stress-strain state is simulated in the MicroFe software, and a calculation model is developed allowing for the identified damages of reinforced concrete structures and the proposed design solution for the truss reinforcement. The serviceability restoration of principal and secondary trusses implies the creation of solid truss elements, the joint operation of the reinforcement with the repaired protective concrete layer, and secondary truss reinforcement with polymer fibers.

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