Estimation of optimum isolator parameters for effective mitigation of seismic risk for bridges

Karalar M., DİCLELİ M.

5th International Conference on Bridge Maintenance, Safety and Management (IABMAS), Pennsylvania, United States Of America, 11 - 15 July 2010, pp.3295-3301 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Pennsylvania
  • Country: United States Of America
  • Page Numbers: pp.3295-3301
  • Middle East Technical University Affiliated: Yes


In this study, closed form equations as functions of the isolator, bridge and ground motion properties are formulated to calculate the optimum characteristic strength, Q(d) and post-elastic stiffness, k(d), of the isolator to minimize the maximum isolator displacement (MID) and force (MIF) for seismic isolated bridges (SIBs). This formulation required more than 13000 nonlinear time history analyses of simplified SIB models. The analyses results revealed that the optimum Qd and kd are highly dependent on the site soil conditions and peak ground acceleration of the ground motion.