Title: Effects of vertical irregularities and construction quality in seismic fragilities for reinforced concrete buildings
Authors: Pathmanathan Rajeev; Solomon Tesfamariam
Addresses: Department of Civil Engineering and Construction Engineering, Swinburne University of Technology, VIC 3122, Australia ' School of Engineering, The University of British Columbia, Okanagan Campus, 3333 University Way, Kelowna, BC, V1V 1V7, Canada
Abstract: Seismic fragility of buildings is often developed without consideration of irregularities and material qualities that can underestimate the prevalent vulnerability. This study demonstrates effect of vertical irregularities (VIs) and construction/design quality (CQ) on seismic fragility curves of reinforced concrete (RC) frames. A six-story three-bay RC moment resisting frame designed for seismicity of Vancouver, BC, Canada, according to the 2005 National Building Coded of Canada, is considered. Three sets of 15 ground motions, corresponding to the 2%, 5%, 10% probability of exceedence in 50 years hazard level, are matched to Vancouver's mean response spectrum at the natural period of the structure and used for nonlinear time history analyses. Sensitivity of seismic demand (i.e., interstory drift and story shear) on VI and CQ is studied. Finally, the interaction effects of VI and CQ in seismic demand of a structure is considered.
Keywords: vertical irregularities; construction quality; CQ; reinforced concrete; RC; vulnerability assessment.
International Journal of Earthquake and Impact Engineering, 2017 Vol.2 No.1, pp.1 - 31
Received: 15 Jul 2016
Accepted: 05 Aug 2016
Published online: 04 Apr 2017 *