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本文采用动力相互作用因子法,对群桩在水平方向谐和激振力作用下的动力反应进行了分析,并与足尺原型桩的野外试验结果进行了比较。由群桩的振幅,刚度和阻尼的频率响应曲线,给出桩-土-桩相互作用对群桩动力特性的影响。边界层概念的引入及由试验确定自由桩长,使理论计算曲线与原型桩的实测结果符合一致。本文还对同一试验场地相同条件下的单桩进行了动力反应对比分析。
In this paper, the dynamic interaction factor method is used to analyze the dynamic response of group piles under horizontal harmonic excitation force and compared with the field test results of full-scale prototype piles. The influence of the pile-soil-pile interaction on the dynamic characteristics of the pile group is given by the amplitude, stiffness, and frequency response curves of the pile group. The introduction of the concept of boundary layer and the determination of the free length of the pile by the test make the theoretical calculation curve consistent with the measured results of the prototype pile. In this paper, the dynamic response of a single pile under the same conditions at the same test site is analyzed.