INFLUENCE OF GROUND MOTION RECORD SELECTION ON HIGHER MODE DEMANDS IN RC WALLS: A COMPARISON OF UHS AND CS APPROACHES

This study examines the influence of code-prescribed methodologies for ground motion record selection on the higher-mode response of structures. Specifically, it compares two conceptually different target spectra: the Uniform Hazard Spectrum (UHS) and the Conditional Spectrum (CS). Using shear wall buildings designed following Eurocode 8 (EC8) response spectrum analysis, we analyse the non-linear structural response for different record selection approaches, including a single UHS and distinct CS with conditional periods beyond the first mode. The comparison quantifies the differences in key engineering demand parameters (EDP), such as peak-storey drift, base shear, and overturning moment.