摘要
为了研究胶凝砂砾石料动力特性,采用大型动三轴仪压缩试验,分析该材料在动荷载作用下的动应力—动应变关系和阻尼比的变化规律。结果表明:胶凝砂砾石料的动应力—动应变关系曲线呈非线性特征,由包络曲线可以将胶凝砂砾石料压缩过程大致分为压密、弹性、屈服、应变软化等4个阶段,且该材料的峰值强度随围压增加而增大;在同一围压作用下,随动应变的增大,阻尼比先减小趋于平缓后增大;在相同应变条件下,阻尼比随着围压增加而减小。
In order to study the dynamic characteristics of CSG material,the experiment used by large scale dynamic triaxial instruments was adopted to analyze the dynamic stress-strain relationship and the rule of variation of damping ratio of the material under dynamic load.The test results show,that the dynamic stress-strain cun,es of CSG material is non-linear and dynamic stress-strain curve by the envelope curve can be divided into four stages as compaction,elasticity,yield and strain softening and the peak strength of the material increases with the increase of confining pressure.Under the same confining pressure,with the increase of strain,the damping ratio decreases first then increases and the damping ratio decreases with the increase of confining pressures under the same strain condition.
作者
田林钢
宗君正
黄虎
霍文龙
巴超
TIAN Lingang;ZONG Junzheng;HUANG Hu;HUO Wenlong;BA Chao(North China University of Water Resources and Electric Power,Zhengzhou 450008,China;Henan Runyan Construction Group Co.,Ltd.,Zhengzhou 455000,China)
出处
《人民黄河》
CAS
北大核心
2018年第9期130-132,138,共4页
Yellow River
基金
河南省科技攻关项目(182102210338)
关键词
动三轴试验
应力-应变曲线
阻尼比
肢凝砂砾石材料
dynamic triaxial test
stress-strain curve
damping ratio
Cement Sand and Gravel(CSG)material
