Centrifuge Model Tests on Bearing Behavior of Guardrail Supporting Piles Subjected to Horizontal Impact and Static Loads

摘要

This study aims to investigate behavior of guardrail supporting piles subjected to horizontal impact and static load using centrifuge model tests. A centrifuge testing system capable of impact and static loading was developed. A series of centrifuge model tests was carried out at 11.3g of a centrifugal acceleration. The parameters of the centrifuge tests include ground type (flat ground and slope) and loading type (static and impact). From the results, load-displacement curves were constructed and the ultimate load was determined from the load- displacement curve. The corresponding soil reaction pressure distributions at the ultimate state were calculated and discussed in terms of load types and ground conditions.