Experimental investigation on seismic behavior of scoured bridge pier with pile foundation

Shiou Chun Wang, Kuang-Yen Liu, Chia Han Chen, Kuo Chun Chang

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

This study investigated the seismic performance and soil-structure interaction of a scoured bridge models with pile foundation by shaking table tests using a biaxial laminar shear box. The bridge pier model with pile foundation comprised a lumped mass representing the superstructure, a steel pier, and a footing supported by a single aluminum pile within dry silica sand. End of the pile was fixed at the bottom of the shear box to simulate the scenario that the pile was embedded in a firm stratum of rock. The bridge pier model was subjected to one-directional shakes, including white noise and earthquake records. The performance of the bridge pier model with pile foundation was discussed for different scoured conditions. It is found that the moment demand of pile increases with the increase of scoured depth whereas the moment demand of the bridge pier decreases, and this transition may induce the bridge failure mechanism transform from pier to pile. The seismic demand on scoured pile foundations may be underestimated and misinterpreted to a certain degree. When evaluating the system damping ratio with SSI, the system response may not be significantly changed even if the soil viscous damping contribution is varied.

Original languageEnglish
Pages (from-to)849-864
Number of pages16
JournalEarthquake Engineering and Structural Dynamics
Volume44
Issue number6
DOIs
Publication statusPublished - 2015 May 1

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

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