论文部分内容阅读
用解析方法在频率域内研究考虑质量耦合效应的饱和黏弹性地基土中管桩的纵向振动特性。基于Biot理论,采用薄层法,推导得到饱和黏弹性地基土的位移、应力等的表达式。将管桩等效为一维弹性杆件处理。根据界面连续性条件,给出饱和黏弹性地基土中管桩的纵向振动一般分析方法和桩顶动力复刚度的表达式。在该基础上,对比分析饱和地基土中实心桩和管桩纵向振动特性。通过算例分析,考察桩周土和桩芯土的力学参数对桩顶刚度因子和等效阻尼的影响。研究表明,饱和黏弹性地基土中实心桩和管桩的纵向振动有明显的差异。
Study on Longitudinal Vibration Characteristics of Pipe Piles in Saturated Viscoelastic Soil Considering Mass Coupling Effect in Analytical Method. Based on the Biot theory, the expression of displacement and stress of saturated viscoelastic soil is derived by thin layer method. The pipe pile equivalent to one-dimensional elastic rod processing. According to the condition of interface continuity, the general analysis method of longitudinal vibration of pipe pile in saturated soil with viscoelastic foundation and the expression of complex stiffness of pile top dynamic force are given. On this basis, the longitudinal vibration characteristics of solid piles and pipe piles in saturated soil are comparatively analyzed. Through the example analysis, the influence of the mechanical parameters of pile surrounding soil and pile core soil on the top stiffness factor and equivalent damping is investigated. The results show that the longitudinal vibrations of solid piles and pipe piles in saturated viscoelastic soil are obviously different.