Seismic Assessment of Asymmetric Single-Story RC Buildings by Modified Pushover Analysis Using the “Capable Near Collapse Centre of Stiffness”: Validation of the Method

ABSTRACT

A modification procedure on the standard pushover analysis for single-story asymmetric RC buildings, based on the “Capable Near Collapse Principal Reference System”, has been proposed recently. According to this procedure, the lateral static floor loading is applied eccentrically to the mass centre, using inelastic dynamic eccentricities plus any accidental ones. In this work, variations of a single-story building, about the static eccentricity and the torsional sensitivity, are examined, to verify this new pushover procedure comparing with the results of N-LRHA. The results of this parametric investigation show that the proposed procedure can safely predict the building’s stiff and flexible-side displacements.

KEYWORDS:

• Capable Near Collapse Centre of Stiffness
• nonlinear static analysis
• pushover analysis
• dynamic eccentricities
• torsionally-flexible building
• response history analysis