摘要
为准确描述重复荷载作用下路基土3阶段永久变形特性,在五元件粘弹塑性体蠕变方程的基础上,通过把正弦荷载转化为恒定荷载,推导出重复荷载作用下路基土永久变形理论预估模型;进行了路基土重复加载动三轴试验,获得了路基土永久变形发展曲线,并采用理论模型对试验曲线进行了回归。结果表明:在重复荷载作用下,路基土永久变形发展明显呈现3个阶段;理论模型可以较准确地描述路基土3阶段永久变形特性。
In order to describe the permanent deformation characteristics with three stages of sub grade soil under repeated load test, based on the creep equations of visco-elastic-plastic model with five components, after translating the pulse load consisting of a haversine loading and a rest period into a constant load, a theoretical prediction model for the permanent deformation under repeated load was deduced. The repeated load dynamic triaxial tests were carried out to obtain the permanent deformation curves. The test results were regressed by the theoretical model. The resuits show that the permanent deformation with three stages of subgrade soils will happen under repeated load dynamic triaxial tests, the theoretical model can predict the permanent deformation with three stages very well. 1 tab, 4 figs, 12 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第2期29-33,共5页
Journal of Chang’an University(Natural Science Edition)
基金
国家自然科学基金项目(50608007)
关键词
道路工程
路基土
永久变形
预估模型
重复加载试验
road engineering
subgrade soil
permanent deformation
prediction model
repeated load test
作者简介
张洪亮（1974-），男，山东山亭人，副教授，工学博士，E-mail：L29@gl．chd．edu．cn。
