Reliability based optimization of steel frames under seismic loading conditions using evolutionary computationReliability based optimization of steel frames under seismic loading conditions using evolutionary computation Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-082004enEarthquake-resistant design of structures using probabilistic analysis and performance-based design criteria is an emerging field of structural engine-ering. These new analysis and design methodologies are aimed at improving the existing practice and design codes for better prediction of the structural performance. In this paper, a robust and efficient methodology is presented for performing reliability-based structural optimum design of steel frames under seismic loading. The optimization part is realised with evolution stra-tegies, while the reliability analysis is carried out with the Monte Carlo simu-lation method incorporating the latin hypercube sampling technique for the reduction of the sample size. The probability of failure of the frame struc-tures, in terms of interstorey drift limits, is determined via the multi-modal response spectrum analysis. http://creativecommons.org/licenses/by/4.0/Journal of Theoretical and Applied Mechanics342585-608 Manolis Papadrakakis Yiannis Tsompanakis Michalis Fragiadakis Nikos Lagaros Regions, Seismically active Seismic areas Seismic zones Seismically active regions Zones, Earthquake Zones, Seismic earthquake zones regions seismically active seismic areas seismic zones seismically active regions zones earthquake zones seismic