@ ŒfÚŽGŽi˜ajF “ú–{’nkHŠwƒVƒ“ƒ|ƒWƒEƒ€u‰‰W VolF 5Šª ”NF 1978”N •ÅF 665-672•Å ’˜ŽÒi˜ajF - ƒ^ƒCƒgƒ‹i˜ajF - ´˜^i˜ajF
- ƒL[ƒ[ƒhi˜ajF - ŒfÚŽGŽi‰pjF PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒi‰pjF Fumio TATSUOKA, Kenichi TOKIDA, Seiichi YOSHIDA, Izumi MARUYAMA ƒ^ƒCƒgƒ‹i‰pjF SHAKE TABLE TESTS ON DYNAMIC BEHAVIORS OF PILE FOUNDATION MODEL IN LIQUEFYING SAND LAYERS ´˜^i‰pjF
A series of shake table tests of small models of group pile foundation embedded in saturated loose sand layers was performed. It was found that the fundamental natural frequency of pile foundation model decreased in the course of liquefaction in surrounding soil layers from the value when embedded of semi-elastic soil layers to the value when embedded in entirely liquefied soil layers. This caused unstational dynamic behaviors of the models. ƒL[ƒ[ƒhi‰pjF - ‹LŽ–‹æ•ªF - ‹æ•ª @@@ˆÏˆõ‰ï˜_•¶W