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<p>This study systematically investigated the influence of slope effects on soil-pile interaction in integral abutment jointless bridges (IAJBs) under cyclic loading through pseudo-static cyclic tests. While existing studies on the soil-structure interaction in IAJBs had predominantly centered on level-ground conditions, the asymmetric constraint effects of sloped terrains remained inadequately investigated. To address this research limitation, three reinforced concrete piles—with varying ratios (b/d = 2.0, 0.0, −2.0) of the distance (b) from pile side relative to slope crest to the pile diameter (<i>d</i>)—were embedded in layered clay-sand slopes and subjected to cyclic displacements. Key results indicated that decreasing the ratio (b/d) from 2.0 to -2.0 increased the maximum damage depth by 25% and expanded the crack distribution range by 50%. The lateral load and soil reaction of the pile in the slope-facing direction decreased by 29.1% and 28.9%, respectively, while backslope values remained stable. Both the equivalent viscous damping and stiffness in the slope-facing direction degraded by 12–32%. These findings clarified the asymmetric soil-pile interaction mechanisms induced by slope effects and provided critical references for optimizing pile embedment depth and seismic design of IAJBs in sloped terrains.</p>

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Analysis of soil-pile interaction considering slope effect in integral abutment jointless bridges (IAJBs) under cyclic loading

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月26日

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  • Xiaoye Luo,
  • Jinbin Yuan,
  • Qinghui Lin,
  • Zhimin She,
  • Xiaorong Huang,
  • Xia Luo

摘要

This study systematically investigated the influence of slope effects on soil-pile interaction in integral abutment jointless bridges (IAJBs) under cyclic loading through pseudo-static cyclic tests. While existing studies on the soil-structure interaction in IAJBs had predominantly centered on level-ground conditions, the asymmetric constraint effects of sloped terrains remained inadequately investigated. To address this research limitation, three reinforced concrete piles—with varying ratios (b/d = 2.0, 0.0, −2.0) of the distance (b) from pile side relative to slope crest to the pile diameter (d)—were embedded in layered clay-sand slopes and subjected to cyclic displacements. Key results indicated that decreasing the ratio (b/d) from 2.0 to -2.0 increased the maximum damage depth by 25% and expanded the crack distribution range by 50%. The lateral load and soil reaction of the pile in the slope-facing direction decreased by 29.1% and 28.9%, respectively, while backslope values remained stable. Both the equivalent viscous damping and stiffness in the slope-facing direction degraded by 12–32%. These findings clarified the asymmetric soil-pile interaction mechanisms induced by slope effects and provided critical references for optimizing pile embedment depth and seismic design of IAJBs in sloped terrains.