岩土工程学报2025，Vol.47Issue(8)：1607-1618,12.DOI:10.11779/CJGE20231285
考虑地形效应的群桩竖向动力阻抗
Vertical dynamic impedance of pile groups considering topographic effects
摘要
Abstract
In this study,the theoretical equations for vertical impedance for single piles are deduced based on the Hamilton's principle.The reasonable method for calculating the pile-to-pile interaction is proposed considering the vibration difference with respect to the propagation direction.Finally,the impedance of pile groups is solved by combining the deformation coordination condition and mechanical equilibrium of piles and cap.The parameter studies are carried out to investigate the topography effects on the dynamic impedance of pile groups in sloping ground with various pile slenderness ratios,pile-soil modulus ratios and pile spacings.The results show that the interaction factor and pile group impedance fluctuate a lot with frequency.The extent of topography effects depends on frequency and can be significant at specific frequencies.The difference between the impedances for the pile groups in sloping ground and the horizontal ground increases as the slope angle pile length,and soil stiffness increase,which indicates that neglecting the topography effects may bring considerable error to the dynamic impedance of pile groups in slopes.关键词
群桩/动力阻抗/相互作用因子/理论解/地形效应Key words
pile group/dynamic impedance/interaction factor/theoretical solution/topography effect分类
建筑与水利引用本文复制引用
瞿立明,李雄,丁选明,杨长卫,廖昕,陈治良..考虑地形效应的群桩竖向动力阻抗[J].岩土工程学报,2025,47(8):1607-1618,12.基金项目
国家自然科学基金项目(52208370)This work was supported by the National Natural Science Foundation of China(Grant No.52208370). （52208370）
