Incorporating dynamic interactions and system effects in simplified liquefaction assessment

抄録

One significant shortcoming of simplified liquefaction analysis is that it does not account for dynamic interactions during ground shaking and development of liquefaction in a deposit. The lack of consideration of cross-layer interactions results in excessively rapid evolution of the liquefaction response and diminished capacity of simplified analysis to distinguish between varying severities of liquefaction responses associated with different soil profiles and deposit characteristics. This paper presents a framework for incorporating dynamic interaction effects in simplified analysis and introduces preliminary models for dynamic response and diffusion effects in liquefying deposits. The improved accuracy of the modified simplified analysis due to incorporation of interaction effects is demonstrated and discussed through comparisons with liquefaction case histories and results from rigorous dynamic analyses.