【摘要】 Dobry和Gazetas分析群桩振动特性的理论是将土体视为单相介质提出的,对于饱和土中桩-桩相互作用和群桩振动是否适用有待验证。将土体视为液固两相多孔介质,运用Novak薄层法和引入势函数的方法,求解了饱和土层的水平动力阻抗和自由场水平位移衰减函数,并在初参数法的基础上求解了桩-桩水平动力相互作用因子,运用基于动力相互作用因子的叠加原理对饱和土中群桩的水平振动进行了分析,并以3×3桩为例对群桩动力阻抗的主要影响参数进行了分析。提供了一种分析饱和土中桩-桩动力相互作用和群桩动力阻抗的新方法。更多还原

【Abstract】 The theory of analysis of the vibration of pile group proposed by Dobry and Gazetas only for single phase soil,it is needed to verify the theory is suitable for the pile group in saturated soil or not.Based on the theory of porous media,the horizontal dynamic impedance of saturated soil and the attenuation function of horizontal displacement of free field were obtained with Novak layer method and potential functions by regarding soil as two-phase medium.The pile-pile dynamic interaction factor is obtained by initial parameter method;and the horizontal vibration of pile group in saturated soil is investigated by superposition principle which based on dynamic interaction factor;and analyzing the influence of main parameters on the dynamic impedance of pile group with an example of 3×3 pile group.A new method for studying the pile-pile dynamic interaction and the horizontal dynamic impedance of pile group in saturated soil is provided.更多还原