Optimal design of friction pendulum system properties for isolated structures considering different soil conditions

Seismic Reliability-Based Design of Inelastic Structures With Different Values of the Post-Yielding Stiffness Isolated by FPS

“…This assumption represents the failure condition assumed within the numerical analyses. The results of the incremental non-linear dynamic analyses (IDAs), taking into account the collapsed systems, have allowed to estimate the superstructure and isolation response parameters, expressed in terms of displacement ductility demand and of maximum displacement of the isolation level with respect to the ground max max , , respectively, adopted as the engineering demand parameters (EDPs) and assumed to follow a lognormal distribution [21], [31], [48], [52]. Knowing the sample lognormal mean ln ( ) EDP and the dispersion ( ) EDP , it is possible to determine the 50 th , 84 th and 16 th percentile of each lognormal distribution [20].…”

“…The seismic reliability-based design (SRBD) approach for elastic systems has been proposed by Castaldo et al [20]. Optimal friction coefficient values have been defined in [21] depending on the soil condition.…”

Novel procedure for reliability-based cost optimization of seismically isolated structures for the protection of critical equipment: A case study using single curved surface sliders

“…Following common practices, only the horizontal component of the ground motion is considered. [17,20,22,[40][41][42][43] Two approaches are available for performing time-history dynamic analysis of structures subjected to random earthquakes: (a) dynamic-response history analysis using a set of recorded ground-motion time histories and (b) stochastic dynamic analysis employing generated synthetic stochastic ground motion.…”

Optimal Friction Coefficients for Isolated Structures Depending on the Soil Condition

“…It follows that the optimal friction coefficient can be defined considering the seismic intensity corresponding to the collapse limit state [53] in order to ensure an adequate response of the isolated superstructure under strong earthquake events. More details may be found in [33]. Table 3.…”

“…Successively, multi-variate regression expressions are derived for the optimal values of the friction coefficient that minimize the superstructure displacements relative to the base, as a function of the system characteristic parameters, of the seismic input intensity and of the soil condition. More details may be found in [33].…”