Abstract
To enhance the flexural ductility of the prestressed high strength concrete pile, a series of full-scale cyclic loading tests were conducted, and the effect of spiral bars and infilled concrete is examined. Two ultimate stages are determined here based on the damage level and the residual lateral strength, to measure the flexural ductility of the prestressed high strength concrete pile. Test results show that the spiral bars and infilled concrete improve the flexural performance. A moment-curvature relation of the pile with enough spiral bars and infilled concrete was analyzed taking account of the confinement effect. The ultimate curvature culculated by the analysis shows good agreement with the test results.
