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Structural Engineering and Mechanics
  Volume 82, Number 1, April10 2022 , pages 55-67

Seismic performance assessment of the precast concrete buildings using FEMA P-695 methodology
Mahdi Adibi and Roozbeh Talebkhah

    The precast reinforced concrete frame system is a method for industrialization of construction. However, the seismic performance factor of this structural system is not explicitly clarified in some existing building codes. In this paper, the seismic performance factor for the existing precast concrete building frame systems with cast-in-situ reinforced shear walls were evaluated. Nonlinear behavior of the precast beam-column joints and cast-in-situ reinforced shear walls were considered in the modeling of the structures. The ATC-19's coefficient method was used for calculating the seismic performance factor and the FEMA P-695's approach was adopted for evaluating the accuracy of the computed seismic performance factor. The results showed that the over-strength factor varies from 2 to 2.63 and the seismic performance factor (R factor) varies from 5.1 to 8.95 concerning the height of the structure. Also, it was proved that all of the examined buildings have adequate safety against the collapse at the MCE level of earthquake, so the validity of R factors was confirmed. The obtained incremental dynamic analysis (IDA) results indicated that the minimum adjusted collapse margin ratio (ACMR) of the precast buildings representing the seismic vulnerability of the structures approximately equaled to 2.7, and pass the requirements of FEMA P-695.
Key Words
    beam-column joint; collapse capacity; nonlinear dynamic analysis; precast concrete building; seismic performance factors
Mahdi Adibi and Roozbeh Talebkhah: School of Civil Engineering, College of Engineering, University of Bojnord, Iran

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