摘要
根据室内动三轴试验结果,得到了黄土的含水量、孔隙比、试验振次、固结应力比等关键参量对黄土震陷变形的影响特性;通过对黄土震陷的时程曲线进行分析,描绘了黄土在发生塑性变形过程时的发展规律;在原状非饱和黄土的残余变形定量研究中对黄土震陷的几个基本参数及其主要影响因素进行了分析,实现了不同含水量下原状非饱和黄土震陷残余应变数学模型的建立,并对黄土体塑性破坏的力学机制进行了分析。
According to the results of indoor dynamic triaxial tests,the influence of key parameters such as water content,void ratio,trial vibration times and consolidation stress ratio on loess seismic subsidence is obtained.In the paper,by the analysis on the time history curves of loess subsidence,the development laws of loess in the course of plastic deformation is depicted;several basic parameters and their main influencing factors of loess subsidence are analyzed in the quantitative study of residual deformation of intact unsaturated loess.As a result,we realize the establishmentof the mathematical model which can describe the residual strain of intact unsaturated loess subsidence with different water content,and analyze the mechanical mechanism of plastic damage of loess.
作者
孙昱
张炜超
任浩
孙军杰
张创军
SUN Yu;ZHANG Weichao;REN Hao;SUN Junjie;ZHANG Chuangjun(Qianling Seismostation,Earthquake Administration of Shanxi Province,Xianyang 713300,China;The Emergency Center,Earthquake Administration of Shanxi Province,Xi’an 710068,China;Lanzhou Institute of Seismology,China Earthquake Administration,Lanzhou 730000,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2019年第4期139-147,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51779234)
中国地震局地震应急青年重点任务(CEAEDEM201915)
中国地震局监测、预测、科研三结合课题(CEA-JC/3JH-172704)~~
关键词
非饱和黄土
动荷载
残余应变
动三轴试验
unsaturated loess
dynamic load
residual strain
dynamic triaxial tests
