SYMPOSIA PAPER Published: 29 July 2019
STP161120170149

Effect of Length-to-Diameter Ratio on the Usable Frequency Range of Impulse Response Testing in Pile Foundations

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The guided wave theory has been introduced to determine the usable frequency range for reliably using the well-known one-dimensional wave theory to interpret impulse response testing results in pile foundations. Length-to-diameter ratio is usually considered a key factor that affects the analysis results. In this research, 37 testing cases with length-to-diameter ratios widely varying from 4 to 36 were collected to determine the effect. Regardless of the diameter size or pile type, the testing cases with a length-to-diameter ratio (slenderness) below 15 had a consistent scattering along or near the theoretical usable frequency-diameter curves due to a better propagation ability. For the slender cases, the experimental points scatter far below the theoretical usable frequency-diameter curves due to more energy leakage during propagation.

Author Information

Wang, Helsin
HCK Geophyscial, Taipei, TW
Wang, Chung-Yue
National Central University, Taoyuan, TW
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Details
Developed by Committee: D18
Pages: 273–285
DOI: 10.1520/STP161120170149
ISBN-EB: 978-0-8031-7668-3
ISBN-13: 978-0-8031-7667-6