Simulated seismic load tests on prestressed concrete piles and pile-pile cap connections

Abstract

The results of tests conducted in New Zealand on prestressed concrete piles and pile-pile cap connections subjected to simulated seismic loading are summarized. The piles were of prestressed pretensioned concrete with a 400 mm (15.7 in.) octagonal cross section and contained spiral reinforcement. The pile caps were of reinforced concrete. The range of pile-pile cap connection details tested included piles with ends embedded in the cap either with or without the ends of the longitudinal steel exposed, and the use of Ion-gitudinal steel dowel bars. The test results showed that well detailed prestressed concrete piles and pile-pile cap connections are capable of undergoing large post-elastic deformations without significant loss in strength when subjected to severe seismic loading.