地震工程学报2016，Vol.38Issue(5)：751-756,6.DOI:10.3969/j.issn.1000-0844.2016.05.751
动荷载作用下粉煤灰改性黄土的震陷特性
Seismic Subsidence Behavior of Fly-ash-modified Loess under Dynamic Loading
摘要
Abstract
In order to obtain raw material locally and make optimal use of fly ash in engineering con-struction in loess areas,we conducted a series of dynamic triaxial tests on unsaturated remolded loess specimens that had been modified with different proportions of fly ash.Based on the test results,we studied the seismic subsidence properties of loess based on the improvement afforded by the fly ash,and derived change laws for the dynamic modulus of deformation and the dynamic residual strain for different proportions of fly ash.The results show that the quantity of dope in fly ash significantly influences the seismic subsidence properties of loess.The changes in the dynamic modulus of deformation and in the dynamic residual strain vary with respect to the improvement afforded by fly ash under the same consoli-dation stress,i.e.,the former becomes larger while the latter become smaller and the relationship between them is well described by the power function.Moreover,we verified that the anti-seismic subsidence behavior of the loess specimens was much better when the proportion of fly ash is about 20%.Thee research findings provide a scientific basis for establishing anti-seismic designations for foundations in loess areas,and thus have important application value.关键词
粉煤灰/黄土/震陷特性/动变形模量/动残余应变Key words
fly ash/loess/seismic subsidence/dynamic deformation modulus/dynamic residual strain分类
建筑与水利引用本文复制引用
王峻,高中南,车高凤,钟秀梅,王强,王平,王谦,柴少峰..动荷载作用下粉煤灰改性黄土的震陷特性[J].地震工程学报,2016,38(5):751-756,6.基金项目
中国地震局地震预测研究所基本科研业务费项目(2014IESLZ02,2012IESLZ02) （2014IESLZ02,2012IESLZ02）
甘肃省自然科学基金资助项目(1308RJZA153) （1308RJZA153）
国家自然科学基金(51408567) （51408567）
