The Effects of Friction Coefficients on the Performance Behavior of Triple Friction Pendulum Base Bearings
摘要
This research investigates the damping ratio and horizontal and vertical stiffness of triple friction pendulum bearings (TFPBs) characterized by unalike friction coefficients. For this objective, two TFPBs with different friction coefficients and identical geometrical characteristics are established and simulated utilizing ABAQUS finite element software in accordance with ASCE 7–16 provisions. The horizontal displacement of both TFPBs remains constant and is determined by the site-specific seismic hazard and the building’s dynamic characteristics. Comprehensive horizontal and vertical stability analyses are carried out on both TFPBs under specific conditions to examine their stability and performance in all directions. The analysis showed that both TFPBs performed as anticipated without experiencing a plastic strain, permanent deformation, instability, or sustained damage in all directions. The results also demonstrated that adjusting friction coefficients of TFPBs influenced their damping ratio and horizontal stiffness, whilst the vertical stiffness remained constant, which, in turn, affected their seismic performance in response to cyclic loadings.