The Proceedings contain 30 papers presented at the 2nd Working Conference on "Relia.bility and Optimization of Structural Systems" , London, UK, September 26 - 28, 1988. The Working conference was organized by the IFIP Working Group 7.5. The Proceedings also include 3 papers which were submitted, but for various reasons not presented at the Working Conference. The Working Conference was attended by 47 participants from 15 countries. The Conference was the second scientific meeting of a new IFIP Working Group 7.5 on "Reliability and Optimization of Structural Systems". The purpose of the Working Group 7.5 is to promote modern structural system optimization and reliability theory, to advance international cooperation in the field of structural system opti mization and reliability theory, to stimulate research, development and application of structural system op timization and reliability theory, to further the dissemination and exchange of information on reliability and optimization of structural system optimization and reliability theory, to encourage education in structural system optimization and reliability the ory. At present the members of the Working Group are: A. H. S. Ang, USA M. R. Gorman, USA G. Augmti, Italy M. Grimmelt, Germany, F. R. M. J. Baker, United Kingdom N. C. Lind, Canada P. Bjerager, Norway H. O. Mad"en, Denmark A. Der Kiureghian, USA F. MO$e$, USA o. Ditlev"en, Denmark Y. Murol$u, Japan D. M. Frangopol, USA R. Rac/cwitz, Germany F. R.

Inhalt
Time-Variant Reliability Analysis Utilizing Response Surface Approach.- Iterative Elastic and Plastic Optimal Design of Steel Frames by a Mixed Method Including Double Secant Method for Nonlinear Mathematical Programming.- Reliability Approach to the Design, Construction and Use of Natural Draught Cooling Towers.- Perception of Risks and Reactions to Accidents.- A New Monte Carlo Technique in Structural Reliability with a Plastic Frame Example.- On Spatial Correlation of Nodal Wave Forces in System Reliability Analysis of Offshore Structures.- Collapse Probability for Elasto-Plastic Beam Structures.- Stochastic Wave Loads for Reliability Analyses of Jacket Structures.- Excursion Probabilities of Non-Homogeneous Gaussian Scalar Fields Based on Maxima Considerations.- Optimization of Structural Systems under Reserve and Residual Reliability Requirements.- Structural Reliability Analysis of Floating Offshore Structure.- Double Secant Method for Nonlinear Mathematical Programming.- Improving the Acceptability of Reliability-Based Safety Factors for the Design of Structural Systems.- Reliability Concept Applied to Optimum Configuration of Fibrous Composites.- On a Reliability-Based Shape Optimization of Truss Structures.- Prediction of Extreme Values of Linear Combination of Load Effects.- Parametric Decomposition for System Reliability Evaluation.- Integration of Multinormal Densities on Surfaces.- Optimum Design of Damage Tolerant Marine Structures.- Development of Techniques to Investigate the Ultimate Limit State of Framed Structures.- Probabilistic Fatigue of Offshore Structures.- Bayesian Prediction of Design Wave Heights.- Inspection Strategies for Concrete Bridges.- The Virtual Distortion Method Applied to the Reliability Analysis of Offshore Structures.- A Probabilistic Wave Model for Reliability Analysis.- Second Order Reliability by an Exact Integral.- Structural Reliability Assessment by Minimal Representations in a Mechanism Approach.- A Random Field Model for the Estimation of Earthquake Hazard due to Active Faults.- Reliability Analysis of Stochastic Rigid-Ideal Plastic Wall by Finite Elements.- Long-Term System Reliability of Offshore Jacket Structures.- Index of authors.