Computational Reliability of Soil-foundation-structure Interaction Systems

摘要

In recent years, computational reliability methods have been employed as powerful tools to perform probabilistic assessment of structural systems. In the context of Performance-Based Earthquake Engineering (PBEE), seismic FE response analysis of structural systems has been combined with advanced methods in reliability analysis. Finite element response sensitivity analysis (FERSA) is a crucial component of computational reliability analysis. The Direct Differentiation Method (DDM) has been developed as an efficient and accurate method for FERSA. In this paper, the computational reliability methods have been extended to realistic Soil-Foundation-Structure Interaction (SFSI) systems, by extending the DDM to force-based and three-field mixed structural elements as well as a multi-yield surface J2 plasticity soil model. In this paper, various adopted or newly developed reliability analysis methods based on the Design Point (DP) search are considered to solve both time-invariant and time-variant reliability problems for SFSI systems. Structural and SFSI system models are used as benchmark examples to illustrate the proposed methodology for computational reliability analysis of SFSI systems.