A Case Study of Strengthening of Deficient RC Building with Internal Steel Frame

Abstract eng:
This study examines the strengthening of existing deficient reinforced concrete (RC) building by using internal steel frame (ISF). Test results indicated that ISF increased the lateral strength, ductility and energy dissipation capacity of the deficient RC building significantly. The test results were compared with simulations to observe performance levels. A case study building was analyzed to demonstrate the performance of an ISF retrofitted deficient RC building by using an analytical model calibrated with test results. The analyzed building was located at Marmara region in Turkey where the region most susceptible to severe earthquakes. The performance based evaluation with respect to Turkish Earthquake Code indicated that this building should be strengthened under Duzce ground motion demand. After strengthening by using ISF, the building was within the life safety performance level which is the performance level that needs to be satisfied for residential buildings. The modeling strategy and construction details of the ISF are also presented in this study.

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