NONLINEAR DYNAMIC ANALYSIS AND ESTIMATION OF BEARING CAPACITY OF A PILE IN STATNAMIC LOAD TEST

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  • 弾塑性解析を用いた急速載荷試験による杭の支持力推定
  • ダンソセイ カイセキ オ モチイタ キュウソク サイカ シケン ニ ヨル クイ ノ シジリョク スイテイ

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Abstract

The statnamic load test is a more convenient method than the static load test for estimation of the bearing capacity of a pile. This paper proposes a nonlinear dynamic analysis method of pile in statnamic load test. The behaviors of pile in statnamic load test can be modeled as a vibration of single-degree of freedom model. The soil spring is assumed as a bilinear spring and the equivalent damping coefficient is calculated from the load-settlement hysteresis loop. The analyzed results are very close to the measured displacement, velocity and acceleration at the top of the pile. Yield bearing capacity of the pile is obtained in the nonlinear analysis.

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