文章基本信息

标题：Plane shock wave propagation in partially saturated soil
本地全文：下载
作者：Shi-hao Wang ; Yue-tang Zhao ; Zi-han Zhang 等
期刊名称：Journal of King Saud University - Science
印刷版ISSN：1018-3647
出版年度：2022
卷号：34
期号：4
页码：1-10
DOI：10.1016/j.jksus.2022.101917
语种：English
出版社：Elsevier
摘要：AbstractConsidered that the gas content of partially saturated soil would decrease under a shock load, which would cause volumetric plastic deformation, Lyakhov's constitutive model is improved. TheP-αstate equation is used to describe the volume compression relationship of partially saturated soil. Numerical and experimental results are compared to validate the material model. The peak stress and duration of shock wave are crucial to study the dynamic response of underground structures. Considered the saturation of partially saturated soils under natural conditions increases with depth and both peak stress and duration change when shock waves propagate in inhomogeneous media, several partially saturated soil models with linearly decreasing air content in the depth direction are developed. The propagation law of shock waves with various peak stresses and durations in partially saturated soils is studied. The results show that the peak stress caused by the incident load in partially saturated soil first decreases and then increases under incident loads with a shorter duration, and it increases monotonically under incident loads with a longer duration. The rate of change in the incident peak stress is proportional to the air content at the top of the partially saturated soil. The peak free-field stress reaches its maximum, which is 2.2 to 5.5 times the peak stress of the incident load, in fully saturated soil. Long-duration incident loads such as nuclear explosions are more threatening to underground structures than short-duration incident loads. Underground structures buried in fully saturated soil or below fully saturated soil with higher air contents above are more at risk than underground structures buried in partially saturated soil with smaller air contents.
关键词：KeywordsenPartially saturated soilVolume compression relationshipPlane shock wavePeak stressNumerical research