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在循环负荷下,分析土壤和堆的相互作用,考虑整体支柱无关节桥梁 (IAJB) 的斜率效应
Xiaoye Luo1,2, Jinbin Yuan1,2, Qinghui Lin3
1School of Resource Engineering, Longyan University, Longyan, 364012, China.
Scientific reports
|November 26, 2025
概括
斜坡效应显著影响整体支柱无关节桥梁 (IAJBs). 靠近斜坡顶部的堆经历了损坏的增加和侧面负载能力的减少,这对于地震设计至关重要.
科学领域:
- 地质技术工程 地质技术工程
- 结构工程 结构工程
- 地震工程的工程是地震工程.
背景情况:
- 整体支柱无关节桥梁 (IAJB) 是关键基础设施.
- 现有关于IAJB土壤结构相互作用的研究主要集中在平面地面上.
- 斜率效应对IAJB的影响仍未得到充分研究.
研究的目的:
- 系统地调查斜率效应对循环负荷下IAJB土壤堆相互作用的影响.
- 解决关于斜坡地形中不对称约束效应的研究缺口.
- 为优化堆设计和在斜坡环境中的地震性能提供见解.
主要方法:
- 伪静态循环测试是在嵌入多层粘土砂坡的钢筋混凝土堆上进行的.
- 堆经历了周期性移位,与斜坡顶部的距离不同 (b/d比为2.0,0.0,-2.0).
- 测量包括损伤,侧面负载,土壤反应,缩和刚度.
主要成果:
- 降低b/d比率 (将堆靠近山顶) 将最大损伤深度提高了25%,裂分布增加了50%.
- 侧面负荷和面向斜坡方向的土壤反应显著下降 (29.1%和28.9%),而后坡值保持稳定.
- 在面向斜坡的方向上,等效粘性减缓和刚度降低了12-32%.
结论:
- 斜坡效应诱导IAJB中的不对称的土壤堆相互作用机制.
- 在斜坡地形上的IAJB的嵌深度和地震设计策略需要仔细考虑这些不对称效应.
- 结果为提高IAJB在具有挑战性的地形中的弹性提供了关键参考.
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