Innovation of precast pretensioned high-strength spun concrete pile -lessons from 1995 hyogo-ken nanbu earthquake-

摘要

The 1995 Hyogo-Ken Nanbu earthquake caused significant damage not only to the superstructures but also to the foundation piles. Damage assessment results obtained on the foundation piles arose the necessity of re-examination on the seismic design procedures and the mechanical properties of pile itself. In this paper, research results recently obtained for innovating the mechanical properties of precast pretensioned high-strength spun concrete pile were summarized in terms of concrete properties, flexural and shear strengths, the flexural ductility enhancement of the pile and the behaviour of pile-to-pile joint, etc.