A Methodology for Performance-Based Optimal Structural Design

A general framework is presented for optimal design based on multiple design criteria which is suitable for performance-based design of structural systems operating under uncertain risk. Reliability-based design criteria are used to maintain specified levels of structural safety by properly taking into account the uncertainties in the future seismic loads. The ground motion uncertainty is characterized by a probabilistic response spectrum developed from available attenuation formulas and seismic hazard models. A simple illustrative example is given.