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    INCREMENTAL DYNAMIC ANALYSIS OF MID-RISE RC BUILDINGS TO ASSESS EFFECT OF CONCRETE STRENGTH AND TENSION REINFORCEMENT RATIO IN BEAM
    (2021) Onat, Onur; Yön, Burak
    Abstract: IDA is a parametric analysis method that has used commonly in several different forms to assess thestructural performance under seismic loadings. This paper focuses on the effect of tension reinforcement ratioand concrete strength to performance of reinforced concrete (RC) structures. For numerical analysis, two RCframe type structures were selected. One of them is 5 stories other of them is 7 stories. Two different concreteclass, C20 and C25, were considered and three tension reinforcement ratios were considered for analyses.Tension reinforcement ratios were determined half of the compressive reinforcement, equal to compressivereinforcement and double of compressive reinforcement ratio. Incremental dynamic analyses (IDA) wereperformed on these buildings. In this study to execute IDA, eleven seismic acceleration benchmark recordswere multiplied with various scaling factors from 0.2 to 1.2. Maximum base shear and corresponding roofdisplacement responses obtained from IDA curves were generated according to these responses. IDA curveswere compared with each other by using suitable graphs. According to analyses results, increasing tensionreinforcement of beam elements has not any effect on maximum roof displacement. Whereas, increasing oftension reinforcement decreased interstorey drift ratio. This result limited the damage due to decreasedinterstorey drift ratio.
  • Küçük Resim
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    A novel inter-story drift limit proposal for TBEC2018 and fragility prognosis with TSC2007
    (2021) Onat, Onur; Yön, Burak
    The basic purpose of this paper is to investigate and propose a novel inter-story drift limits for the currentTurkish Seismic Code to get easy structural assessment by using software. For this aim, numerical analysiswas performed by modeling two types of RC frame structures. One of them is 5 stories, the other of them is7 stories. Two different concrete classes, C20 and C25, were considered and three tension reinforcementratios were considered for analysis. Tension reinforcement ratios were determined by half of the compressivereinforcement, equal to compressive reinforcement and double the compressive reinforcement ratio.Incremental dynamic analyses (IDA) were performed on these buildings. In this study to execute IDA, elevenseismic acceleration benchmark records were multiplied with various scaling factors from 0.2 to 1.0.Maximum base shear and corresponding roof displacement responses obtained from IDA curves weregenerated according to these responses. IDA curves were compared with each other by deriving fragilitygraphs. According to results, proposed limits for the current Turkish seismic code (TBEC-2018) provide,0.6%, 2.4% and 3.3% respectively for MN, GV and GC, rather safe limits compared to drift limits presentedin the foredate seismic code (TSC-2007).