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本文对入土较深、土面以上有一定长度的桩的横向弯曲自振频率进行了理论分析和有限元计算。阐明了土的侧向基床系数与桩的弯曲自振频率之间的关系。关于管桩内外水体对频率的影响,文中给出用实验方法求得的影响系数。文末,计算分析了大型钢管桩的基频,并与现场实测基频值进行了比较,二者很接近。
In this paper, theoretical analysis and finite element calculations are performed for the natural frequencies of lateral bending of piles with deeper soils and a certain length above the soil surface. The relationship between the lateral bed coefficient of the soil and the bending natural frequency of the pile was clarified. With regard to the influence of the water inside and outside the pipe pile on the frequency, the influence coefficient obtained by the experimental method is given in this paper. At the end of the paper, the fundamental frequencies of large-scale steel pipe piles are calculated and analyzed, and compared with the measured values of the fundamental frequency at the site, the two are close.