摘要
本文对瞬态激振时桩—土系统动刚度的确定方法作了初步研究。首先，本文依据基桩振动的弹性模型和模态分析理论，对小应变动测法的理论基础作了进一步探讨，然后提出了适用于不同条件下瞬态激励时的三种确定桩土系统等效刚度（动刚度）的新方法─—瞬态导纳法、频率方程法和弹性波法，并结合工程试桩初步验证了这些方法的正确性。
In this paper, methods to determine the dynamic stiffness of pile-soil system by transientimpact are initiatively studied. On the basis of elastic vibration model of pile and the theory of modalanalysis,the basis of the low-strain dynamic test methods is furtherly researched. Then three newmethods,such as transient mobility method,frequency equation method and elastic wave method ,to beused to determine the dynamic stiffness of pile-soil system under different conditions are presented. Tbecorrectness of these methods has been preliminarily proved by the engineering practice of test piles.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
1994年第1期104-115,共12页
China Railway Science
关键词
动刚度
承载力
铁路
基桩
transient impact,low-strain,dynamic stiffness
