Paper Details

This dissertation evaluates the seismic performance of a G+4 storey reinforced concrete building equipped with Triple Friction Pendulum Bearings (TFPB) under near-fault ground excitations characterized by forward-directivity and fling-step pulses, and compares it with far-field records. A validated nonlinear model in SAP2000 (Fast Nonlinear Time History Analysis) is used to simulate 15 earthquake records consist of five far-field, five near-fault with forward directivity and five near-fault with fling step. Results show that TFPB effectively extends the fundamental period and significantly reduces base shear and roof accelerations relative to a fixed-base system, with broad-stable hysteresis loops indicating high energy dissipation. Near-fault pulses impose notable larger displacement demands, peak isolator displacements and top-story drifts increase, with the most critical demands observed for long-period, high-velocity pulses. While isolation controls force demands, serviceability checks for isolator displacement capacity and top-floor drift govern design in near-fault cases. The study confirms TFPB’s suitability for low-to mid-rise buildings in high seismicity, highlights the need for pulse-aware selection of radii and friction properties, and recommends displacement-capacity verification and performance-based criteria for near-fault applications.

Karan D. Bhadesheeya, Ketan R. Abhani, “A STUDY ON RESPONSE OF BASE ISOLATED STRUCTURE UNDER NEAR-FAULT GROUND MOTION”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 13, Issue 6, pp. 1-9, June 2026.