BUILDING INTER-STOREY DRIFT UNDER CONSISTENT PSEUDO DYNAMIC LOAD
DOI:
https://doi.org/10.11113/jurnalteknologi.v88.23730Keywords:
Earthquake, Seismic Resistance, Viscous Dampers, Inter-Storey Drift, Downscaled Reinforce Concrete ModelAbstract
Earthquakes are among the most destructive natural disasters, causing widespread fatalities and destruction globally. This research investigates the inter-storey drift performance and mode shape of a 1:8 downscaled model of a 1-bay, 3-storey reinforced concrete model (DRCM), constructed based on a high school building’s perimeter skeleton for dynamic load testing with the assistance of Similitude Theory and Buckingham’s Pi Theorem. By addressing the research gaps, consistent ground accelerations are considered rather than existing seismic data from past earthquakes by utilising a shaking table (ST) to simulate ground motion and test the DRCM. The findings indicate that inter-storey drift increases significantly with large, low-aggressiveness ground movements, while higher earthquake intensity results in reduced structural movement characterised by intense vibrations. The structure transitions from a single curvature to a double curvature mode of oscillation under increasing ground acceleration. Testing three brands of viscous dampers revealed that they effectively reduce inter-storey drift, with rooftop displacements decreased by 45%, 63%, and 34% for the APIDO, SKK, and ESPADA dampers, respectively. Finding shows damper with the highest damping constant (APIDO) excels in absorbing large displacements, whereas the least viscous force damper (SKK) is better suited for mitigating lateral displacements during intense vibrations.
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