Structural analysis / Fracture mechanics / Ductility / Constitutive equation

[2011] ANALYSIS ON SHEAR FAILURE BEHAVIOR OF PHC-PILE CONSIDERING CONFINEMENT EFFECT

Cheng JU¹, Hikaru NAKAMURA¹, Seiichi KOUMURA², Youhei SHIRATORI² (1.名古屋大学 2.中部電力)

Keywords:3D-RBSM, Confinement Effect, PHC-Pile, PHC杭, Shear Failure, Soil Pressure, せん断破壊, 土圧, 拘束効果

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Shear failure behaviors of pre-stressed high-strength concrete pile were investigated by 3D-RBSM which is a discrete numerical model and can describe crack development accurately. The applicability of 3D-RBSM was confirmed by comparing with test results such as load-displacement relationship, crack development, deformation performance. Moreover, the effects of passive internal (spiral stirrups) and active external confinement effect was investigated. Several analysis were carried out with stirrups ratio by varying space of stirrups and cross section area and with different external active confinement pressure around pile body under monotonic and cyclic loading. It was revealed that external active confinement pressure is more effective to improve the deformation performance.