轴压作用下带剪力键的钢管桩桩芯混凝土受力研究Research on the force of concrete of steel pipe pile with shear key under axial compression
李怡,王丹伶,郭银,喻宣瑞
摘要(Abstract)：
在码头和桥梁结构中常在钢管桩的顶部设置剪力键,能够提高钢管桩与上部结构连接桩芯混凝土的承载力以及结构整体性。由于带剪力键的桩芯混凝土受力机制较复杂,国内外学者对其理论研究还不够完善。本文以带单个剪力键的钢管桩桩芯混凝土为研究对象,首先基于变形协调原理推导出了弹性范围内桩芯混凝土在轴压作用下的位移和应力公式,然后利用Gebman试验报告中的试验数据与理论计算值进行对比,验证了理论推导公式的合理性。最后将ABAQUS有限元建模得到数模值与理论计算值对比,结果表明:计算值与数模值变化趋势基本一致;理论推导公式更适用于1.0 m以内的小直径钢管桩;桩芯混凝土与剪力键接触位置上部0～0.1 m范围区域为应力敏感区,该区域应力变化显著且应力集中现象明显。
关键词(KeyWords)： 钢管桩;剪力键;轴压作用;桩芯混凝土;ABAQUS建模;应力集中
基金项目(Foundation): 国家自然科学基金(51609025)
作者(Author): 李怡,王丹伶,郭银,喻宣瑞
DOI: 10.13928/j.cnki.wrahe.2020.04.025
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