Abstract
Multi-story reinforced concrete structures in previous periods, in general, do not meet current seismic design code requirements, including the poor materials and execution of civil engineering works. In the scope of this, is analyzed the behavior of the structures during the Earthquake of November 2019, in Albania, specifically in different building stocks. Typical structural deficiencies observed in reinforced concrete (R/C) frame buildings affected by the 2019 earthquake reveal that many collapses occurred could be attributed to the poor quality of construction and use of non-ductile detailing and during the assessment that deficiency beam–column joints can jeopardize the integrity of structures. In general, it is accepted that beam-column joints are critical elements of reinforced concrete buildings subjected to lateral loads and that they may require specific design. Assessment reports have often indicated that beam-column joints, which are one of the most vulnerable and critical structural elements, often suffer shear and/or bond (anchorage) failures leading to a partial or total collapse of the structure. This paper will present some of the destructive and non-destructive tests specifically to the beam-column joints and techniques using fiber-reinforced polymers (FRP) for strengthening. Strengthening of beam-column joints by FRP materials nowadays is treated with various analytical approaches integrated in different software. Various analyses have been conducted and a practical proposal for retrofitting is presented in cohesion with the study case and the implementation.
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