3D finite element analysis of parallel seismic tests for integrity of piles of existing structures

HUANG Da-zhi; CHEN Long-zhu

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3D finite element analysis of parallel seismic tests for integrity of piles of existing structures

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- 3D finite element analysis of parallel seismic tests for integrity of piles of existing structures
- Vol. 29, Issue 6, (2008)
- 作者机构：
  
  上海交通大学船舶海洋与建筑工程学院安全与防灾工程研究所,上海,200240
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473
- Online First：15 July 2013，
  
  Published：2008
- 稿件说明：
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HUANG Da-zhi, CHEN Long-zhu. 3D finite element analysis of parallel seismic tests for integrity of piles of existing structures[J]. 2008, 29(6).
DOI：

HUANG Da-zhi, CHEN Long-zhu. 3D finite element analysis of parallel seismic tests for integrity of piles of existing structures[J]. 2008, 29(6). DOI：

摘要

介绍了旁孔透射波法的原理和测试步骤，对这种无损检测方法在既有建筑物桩基础检测中的应用进行了三维有限元分析。建立了三维桩-土模型并计算动力响应，分别给出了饱和土、非饱和土地基中完整桩和缺陷桩的旁孔透射波信号，并分析了P波时间-深度特征与桩身的相关性。研究表明，旁孔透射波法具有简单易行、无损等优点，可以有效地检测既有建筑物的基础。

Abstract

The principle and process of the parallel seismic for the integrity of piles of existing structures is introduced. A 3D finite element model for the pile-soil system is established for impulse responses. Under saturated soil or unsaturated soil condition

some vibrating velocity-time histories at different depths in the parallel hole are obtained with the numerical model. It is shown that the length and 1D P-wave velocity of a pile are easy to determine from the features of the mentioned velocity-time histories. Results indicated that the PS method is a new suitable nondestructive test to evaluate the integrity of piles of existing structures.

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