Abstract
A simplified dynamic response model is proposed based on the deformation and dynamic stress response characteristics of soil under impact loading. The foundation is divided into two distinct zones: a projection cylinder acting vertically under impact loading and a hollow cylinder outside the projection area. It is assumed that the ramming deformation of the projected cylinder under the vertical impact load is a quasi-static loading process under the maximum contact dynamic stress through the quasi-static method, and the settlement calculation without lateral deformation is given. It is assumed that the inner wall of the hollow cylinder is subjected to horizontal lateral pressure and the analytical solution of the horizontal dynamic stress considering the plastic deformation of soil is given. The simplified dynamic response model can reflect the mechanical response of soil under impulse train load well which can provide reference for similar projects.
Highlights
Research studies on mechanical responses of soil subjected to impact loads have great prosperity in geotechnical engineering or other related fields
The mentioned situations are all related to the mechanical response of soils subjected to impact loading
When the foundation is subjected to an impact load, different areas show different mechanical and deformation responses. ilakasiri et al [1] proposed the concept of impact zone according to the deformation characteristics of soil in 1996 and classified the impact area as three distinct zones: (1) a zone beneath the falling weight undergoing axial deformation while being in vertical motion, (2) an inner zone immediately surrounding the zone with shear deformation, and (3) an outer zone undergoing a relatively lower degree of shear deformation
Summary
Research studies on mechanical responses of soil subjected to impact loads have great prosperity in geotechnical engineering or other related fields. When the foundation is subjected to an impact load, different areas show different mechanical and deformation responses. The focus of dynamic responses in different areas of soil foundation is different in practical projects. In the demolition blasting [6] or dynamic compaction [7] in foundation treatment projects, the vibration of the construction site. Based on the concept of impact load affecting partition and engineering practice, a simplified dynamic response model is proposed in this paper. E ramming deformation of the projected cylinder is assumed to be a quasi-static loading process under the maximum contact dynamic stress. An analytical solution of the horizontal direction stress is obtained which takes the plastic deformation of soil into account
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