Comparative analysis demonstrates QFPI's superiority in seismic performance for multi-story buildings, highlighting efficiency.
This study conducts a 3D comparison of Triple (TFPI) and Quintuple (QFPI) Friction Pendulum isolators for a six story steel building. Its key innovations are two-fold: first, a performance comparison based on optimally designed isolators with closely matched parameters (such as effective period, effective stiffness, etc.); and second, the novel use of a hybrid design method integrating Capacity Spectrum Analysis with the Equivalent Lateral Force (ELF) procedure for the isolator design. The superstructure was designed in accordance with ASCE/SEI 7-2016 and models developed in SAP2000 were validated against OpenSees and literature. Analysis under seven bidirectional far-field records on stiff soil showed QFPI’s superiority, reducing story acceleration and shear by an additional 34% and 30% versus TFPI. While both isolators controlled drift comparably, QFPI achieved this with a 3.5 times more compact design and fewer constraints, demonstrating greater efficiency and practicality.
No takes yet. Share an insight, caveat, or question.
Jafari et al. (2026) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: