摘要
针对强夯过程中,在夯击点及其周围存在局部大变形现象,采用大变形理论对强夯振动进行分析,并利用LS-DYNA有限元软件对强夯过程中土体变形的瞬态过程进行数值模拟,得到的速度时程数据与实际测量的数据比较接近。采用量纲分析的方法得到质点垂直振动速度与距离和夯锤重量的关系式,根据实测数据拟合出真实场地上振动速度的关系,拟合公式为预测强夯振动提供了一个新方法,对预测类似工程因强夯产生的振动对相邻建构筑物的影响有一定的指导意义。
In the process of dynamic consolidation, some hammered spots and their surrounding exist large deformation, This paper analyzes the vibration of dynamic consolidation with the large deformation theory and uses LS-DYNA finite element program to modeling the process of dynamic consolidation. The velocity- time data acquired in the analysis are close to the actual data measured in dynamic consolidation. Using dimension analyzing method reasons a relational formula between vibration velocity and weight of the hammer. And the author uses the actual measured data to imitate the relationship of the vibration velocity. The formula provides a new method to forecast the vibration of dynamic compaction, which makes sense for the similar construction work to forecast the impact for adjacent buildings.
出处
《水运工程》
北大核心
2007年第9期31-35,共5页
Port & Waterway Engineering
关键词
强夯
大变形
振动
LS-DYNA数值模拟
dynamic consolidation
large deformation
vibration
LS-DYNA
numerical modeling
