This proceedings volume contains 33 papers presented at the 3rd Working Conference on "Rel iability and Optimization of Structural Systems", held at the University of California, Berkeley, California, USA, March 26 -28, 1990. The Working Conference was organised by the IFIP (Inter national Federation for Information Processing) Working Group 7.5 of Technical Committee 7 and was the third in a series, following similar conferences held at the University of Aalborg, Denmark, May 1987 and at the Imperial College, London, UK, September 1988. The Working Conference was attended by 48 participants from 12 countries. The objectives of Working Group 7.5 are: to promote modern structural systems optimization and reliability theory, to advance international cooperation in the field of structural system optimization and reliability theory, to stimulate research, development and application of structural system optimization and reli ability theory, to further the dissemination and exchange of information on reliability and optimization of structural systems to encourage education in structural system optimization and reliability theory. At present the members of the Working Group are: A. H.-S. Ang, U.S.A. G. A ugusti, Italy M. J. Baker, United Kingdom P. Bjerager, Norway R. B. Corotis, U.S.A. C. A. Cornell, U.S.A. M. Grigoriu, U.S.A. A. Der Kiureghian, U.S.A. O. Ditlevsen, Denmark D. M. Frangopol, U.S.A. S. Garribba, Italy H. Furuta, Japan M. R. Gorman, U.S.A. M. Grimmelt, Germany, F. R.

Inhalt
Short Presentations.- A New Beta-Point Algorithm for Large Time-Invariant and Time-Variant Reliability Problems.- Rigid-Ideal Plastic System Reliability.- Optimal Allocation of Available Resources to Improve the Reliability of Building Systems.- Life Expectancy Assessment of Structural Systems.- Parameter Sensitivity of Failure Probabilities.- Expectation Ratio Versus Probability.- Application of Probabilistic Structural Modelling to Elastoplastic and Transient Analysis.- Reliability-Based Shape Optimization Using Stochastic Finite Element Methods.- Calibration of Seismic Reliability Models.- Computational Experience with Vector Optimization Techniques for Structural Systems..- Management of Structural System Reliability.- Reliability Analysis of Existing Structures for Earthquake Loads.- Sensitivity Analysis of Structures by Virtual Distortion Method.- Reliability of Daniels Systems with Local Load Sharing Subject to Random Time Dependent Inputs.- Reliability Analysis of Elasto-Plastic Dynamic Problems.- Identification of Autoregressive Process Model by the Extended Kalman Filter.- The Effect of a Non-Linear Wave Force Model on the Reliability of a Jack-Up Platform.- Optimum Cable Tension Adjustment Using Fuzzy Regression Analysis.- Bayesian Analysis of Model Uncertainty in Structural Reliability.- Size Effect of Random Field Elements on Finite-Element Reliability Methods.- Reliability-Based Optimization Using SFEM.- Classification and Analysis of Uncertainty in Structural Systems.- Directional Simulation for Time-Dependent Reliability Problems.- Some Studies on Automatic Generation of Structural Failure Modes.- Sensitivity Analysis for Composite Steel Girder Bridges.- Long-Term Reliability of a Jackup-Platform Foundation.- Constant Versus Time Dependent Seismic DesignCoefficients.- Reliability of Structural Systems with Regard to Permanent Displacements.- Reliability of Current Steel Building Designs for Seismic Loads.- Jackup Structures: Nonlinear Forces and Dynamic Response.- Stochastic Programs for Identifying Significant Collapse Modes in Structural Systems.- Lectures.- Critical Configurations of Systems Subjected to Wide-Band Excitation.- On Reliability-Based Optimal Design of Structures.- Index of authors.