STUDY ON THE APPLICATION OF HIGH-STRENGTH STEEL PIPE PILE WITH YIELD STRESS OVER 450 MPa IN PORT STRUCTURES

Abstract

 Pile-supported wharves in ports tend to have stringent design conditions due to increased loads and seismic forces. Therefore, even if high-strength steel pipe piles with yield stress of 450 MPa are used, the design may not be easily established. This paper has examined the application of steel pipe pile with yield stress over 450 MPa in port structures. The results are as follows. 1) Cyclic loading experiments of steel pipe pile have been carried out. It has been confirm that the strength and deformation performance were as expected. 2) FEM analysis have revealed that the design method of the bending moment-curvature relationship and the ultimate curvature for yield stress up to 450 MPa is also applicable up to 700 MPa.