構造解析／破壊力学／靱性／構成則

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

座長(土木)：内田裕市
座長(建築)：米澤健次
講演者：鞠誠¹, 中村光¹, 河村精一², 白鳥洋平² (1.名古屋大学 2.中部電力)

キーワード：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.