RT Journal Article ID 0220b7e22c6b30a6 A1 Jensen, Hector A1 Sepulveda, Juan A1 Becerra, Luis T1 ROBUST STOCHASTIC DESIGN OF BASE-ISOLATED STRUCTURAL SYSTEMS JF International Journal for Uncertainty Quantification JO IJUQ YR 2012 FD 2012-03-07 VO 2 IS 2 SP 95 OP 110 K1 approximation strategies K1 base-isolated structural systems K1 common random numbers K1 nonlinear optimization K1 robust reliability K1 sensitivity analysis K1 simulation methods K1 stochastic optimization AB The development of a general framework for robust reliability-based design of base-isolated structural systems under uncertain conditions is presented. The uncertainties about the structural parameters as well as the variability of future excitations are characterized in a probabilistic manner. Isolation elements composed of nonlinear lead rubber bearings are used to model the isolation system. The optimal design problem is formulated as a nonlinear constrained minimization problem involving multiple design requirements, including reliability constraints related to the structural performance. Failure events defined by a large number of random variables are used to characterize the reliability of the system. A sequential optimization approach based on global conservative, convex, and separable approximations is implemented for solving the optimization problem. An example problem that considers a 10-story building under stochastic ground excitation illustrates the beneficial effects of base-isolation systems in reducing the superstructure response. PB Begell House LK https://www.dl.begellhouse.com/journals/52034eb04b657aea,5c8b0c4a1cb02748,0220b7e22c6b30a6.html