An analytical study on the effect of pull-out speed of anchor bolts on pull-out strength and failure patterns

DOI
  • Goto Mao
    九州大学 工学府土木工学専攻修士課程
  • Lu Chi
    九州大学 工学研究院社会基盤部門
  • Sonoda Yoshimi
    九州大学 工学研究院社会基盤部門

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Other Title
  • アンカーボルトの引抜き速度が引抜き耐力と破壊形態に与える影響に関する解析的研究

Description

<p>The pull-out strength of anchor bolt embedded in concrete is usually estimated by assuming that the stress is uniformly generated on the failure surface. However, it is known that when anchor bolts are subjected to a sudden pull-out load, the stress distribution becomes non-uniform and the load carrying capacity also differs from that under static loading. In this study, the embedment depth and pull-out velocity of bonded anchors were taken as parameters, and their effects on the failure mode and load carrying capacity were investigated based on numerical analysis using the SPH method. As a result, it was confirmed that the failure mode changes from cone fracture to combined fracture, in which cone fracture and adhesion fracture are mixed, as the pull-out speed increases.</p>

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