Bridging the Gap Between Structural and Geotechnical Engineers in SSI for Performance-Based Design

摘要: Performance-based design (PBD) involves designing structures to achieve specified performance targets under levels of seismic hazard, and requires the analysis entire soil-structure system. Dynamic interaction (SSI) encompasses linear nonlinear response features structure foundation soil. Consequently, both structural geotechnical expertise are needed. Most available computational tools, however, provide either elaborate models for with simplified soil representation, or detailed idealization. This paper discusses SSI pertinent soil-pile-structure (SPSI) problems that direct ­concern PBD structures. The also presents a model developed considerations from engineering, thus, facilitating effective incorporation in PBD. is within ­framework Beam-­on-Nonlinear-Winkler- Foundation (BNWF) approach can be easily integrated into commercially-available software. It accounts nonlinearity discontinuity conditions at pile/soil interface; cyclic degradation stiffness strength due variable-amplitude loading; reduction radiation damping increased nonlinearity. implemented readily package, hence allows engineers properly account effects when performing was used analyze piled foundations reported literature. results showed cave-in recompression reduces pile maximum bending moment its depth ground surface, increases hysteretic soil-pile system, therefore enhancing SPSI could particularly beneficial situations where plastic hinges develop belowground level. In addition, some important loading discussed.