Parametric study on higher mode amplification effects in ductile RC cantilever walls designed for western and eastern Canada

摘要

This paper presents a comparison of the results obtained from a parametric study investigating the influence of various parameters on the higher mode amplification effects, and hence on the seismic force demand, in regular ductile reinforced concrete cantilever walls designed with the 2010 National building code of Canada and the 2004 Canadian Standards Association (CSA) standard A23.3 for western and eastern Canada. The studied parameters are the number of storeys, fundamental lateral period, wall aspect ratio, wall cross-section, wall base flexural overstrength, site class and seismic zone. The study is based on inelastic time-history analyses performed with a multilayer beam model and a smeared membrane model based on the Modified Compression Field Theory, and hence accounting for inelastic shear-flexure-axial force interaction. The results are based on more than 9000 inelastic time-history analyses carried out with earthquake ground motions compatible with typical uniform hazard spectra for the western and eastern Canadian regions.