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Structural Engineering and Mechanics
  Volume 83, Number 4, August25 2022 , pages 563-576

Progressive collapse resistance of low and mid-rise RC mercantile buildings subjected to a column failure
Aydin Demir

    This study aimed to evaluate the progressive collapse potential of buildings designed using conventional design codes for the merchant occupancy classification and subjected to a sudden column failure. For this purpose, three reinforced concrete buildings having different story numbers were designed according to the seismic design recommendations of TSCB-2019. Later on, the buildings were analyzed using the GSA-2016 and UFC 4-023-03 to observe their progressive collapse responses. Three columns were removed independently in the structures from different locations. Nonlinear dynamic analysis method for the alternate path direct design approach was implemented for the design evaluation. The plasticity of the structural members was simulated by using nonlinear fiber hinges. The moment, axial, and shear force interaction on the hinges was considered by the Modified Compression Field Theory. Moreover, an existing experimental study investigating the progressive collapse behavior of reinforced concrete structures was used to observe the validation of nonlinear fiber hinges and the applied analysis methodology. The study results deduce that a limited local collapse disproportionately more extensive than the initial failure was experienced on the buildings designed according to TSCB-2019. The mercantile structures designed according to current seismic codes require additional direct design considerations to improve their progressive collapse resistance against the risk of a sudden column loss.
Key Words
    fiber hinge; mercantile buildings; progressive collapse; reinforced concrete; Turkish seismic code
Aydin Demir: Department of Civil Engineering, Faculty of Engineering, Sakarya University, Esentepe Kampusu Kemalpasa Mahallesi Universite Caddesi Serdivan, Sakarya 54050, Turkey; Department of Civil, Environmental and Geodetic Engineering, College of Engineering, The Ohio State University, 2070 Neil Avenue Columbus, OH 43210, USA

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