Evaluation of the level of seismic protection afforded to reinforced concrete shear wail systems

This paper presents the results of an investigation into the seismic level of protection afforded to reinforced concrete shear wall systems. The vulne rability and damage potential of a 30-storey building consisting of a coupl ed shear wall as well as noncoupled shear walls as lateral force resisting systems is evaluated. The structure, which is similar to an existing buildi ng designed and constructed in Vancouver, is designed in accordance with th e 1995 National Building Code of Canada and detailed using the provisions o f CAN3-A23.3-M94 (1994). Elastic analysis is performed using both two-dimen sional and three-dimensional shell element models for lateral loading with and without the effects of torsion. Element design specifications are used to create moment curvature envelopes to describe the members (beam and wall ) deformation characteristics. These characteristics are incorporated into the nonlinear pushover analysis and dynamic inelastic time history analysis . The level of protection investigation illustrates that the coupled and no ncoupled shear wall systems exhibit excellent performance following excitat ions of two and three times the design level earthquake. Maximum interstore y drift and element damage levels are within the acceptable limits for life -safe performance.