界面均质度对混凝土单丝拉拔性能影响的数值模拟研究  

Numerical Simulation Study of Influence of Interface Heterogeneity on Single Fiber Pull-Out Test of Concrete Matrix

作　　者：曾向荣[1] 张亚芳[1] 刘浩 刘丰[1] 蔡北海[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]合乐中国有限公司

出　　处：《中山大学学报（自然科学版）》2015年第5期56-61,共6页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(51278136);广州市教育局羊城学者基金资助项目(12A007G)

摘　　要：建立混凝土单丝拉拔数值模拟模型,研究了界面均质度变化对单丝拉拔构件力学性能的影响,获得了拉拔构件荷载-位移曲线、声发射累计曲线及界面剪应力分布曲线等。研究表明:界面均质度变化对拉拔构件峰值荷载及劣化过程影响较大;声发射累计数随界面均质度增加而增加;同时界面剪应力分布曲线随着界面均质度增加而趋向平滑。Numerical model of fiber-concrete matrix had been generated,and the influence of interface heterogeneity on single fiber pull-out test of concrete matrix had been studied. Furthermore,load-displacement curves,acoustic emission（ AE） accumulation curves and interface shear stress distribution curves could be obtained and interpreted. The results of this numerical study indicate that change of the interface heterogeneity has great effects on peak load and degradation of the load-displacement curves. In addition,the AE accumulation increases with the interface heterogeneity. The interface shear stress distribution curves show that the shear stress distribution curves tend to be smooth with the increase of the interface heterogeneity.

关 键 词：单丝拉拔 界面均质度 声发射 

分 类 号：TB333[一般工业技术—材料科学与工程]