تحلیل عددی فشار آب منفذی دینامیکی در سدهای خاکی تحت بارگذاری زلزله

Abstract
In this study, the dynamic behaviour and pore water pressure generation in a typical earth dam
were investigated using the non-linear dynamic analyses results. Based on the Byrne version of
the Finn’s Model, variations of pore water pressure ratio against the strength parameters of
materials and also the dilatancy angle of shell material were considered. In addition, using the
scaling method of applying maximum acceleration, the variations of pore water pressure ratio
and liquefaction phenomenon were investigated in different maximum accelerations. The results
demonstrated that excess pore pressure depends strongly on the strength parameters, dilatancy
angle of materials and applied maximum acceleration. Inappropriate compaction of shell
material results in severe increase in liquefaction-induced failure potential. In earth dams with
appropriate compaction of materials, liquefaction probability in the dam body, is negligible
even in large earthquake accelerations.