Proposal of a New Design Method of the Pile-Bent Structure Considering Plastic Hinge

단일 현장타설말뚝의 소성힌지를 고려한 최적설계법 제안

  • 안상용 ((주)대우엔지니어링 인프라사업본부) ;
  • 장심섬 (연세대학교 토목환경공학부) ;
  • 김재영 (연세대학교 토목환경공학부)
  • Received : 2010.11.24
  • Accepted : 2011.01.18
  • Published : 2011.02.28


In this study, a new design method of Pile-Bent structure considering plastic hinge was proposed on the basis of the beam-column model. To obtain the detailed informations, the optimized cross-section ratio between column and pile was analyzed to induce the plastic hinge at the joint section between the pile and column. Base on this study, the optimized diameter ratio of pile and column can be obtained below the inflection point of the bi-linear curve depending on the relations between column-pile diameter ratio ($D_c/D_p$) and normalized lateral cracking load ratio ($F/F_{Dc=Dp}$). Moreover, through comparisons with field cases to find out in-depth limit in which minimum concrete-steel ratio could be applied, in-depth limits ($L_{As=0.4%}$) normalized by the pile length ($L_p$) proportionally decrease as the pile length ($L_p/D_p$)increases up to $L_p/D_p=17.5$, and beyond that in-depth limit converges to a constant value (${\simeq}0.3$).


Column-pile diameter ratio ($D_c/D_p$);Lateral cracking load ratio ($F/F_{Dc=Dp}$);Minimum concrete-steel ratio;Nonlinear behavior of material;Pile-Bent structure;Plastic hinge


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