中山大学学报（自然科学版）
中山大學學報（自然科學版）
중산대학학보（자연과학판）
Acta Scientiarum Naturalium Universitatis Sunyatseni
2015年
5期
56-61
,共6页
曾向荣%张亚芳%刘浩%刘丰%蔡北海
曾嚮榮%張亞芳%劉浩%劉豐%蔡北海
증향영%장아방%류호%류봉%채북해
单丝拉拔%界面均质度%声发射
單絲拉拔%界麵均質度%聲髮射
단사랍발%계면균질도%성발사
single fiber pull-out test%interface heterogeneity%acoustic emission
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。
建立混凝土單絲拉拔數值模擬模型，研究瞭界麵均質度變化對單絲拉拔構件力學性能的影響，穫得瞭拉拔構件荷載－位移麯線、聲髮射纍計麯線及界麵剪應力分佈麯線等。研究錶明：界麵均質度變化對拉拔構件峰值荷載及劣化過程影響較大；聲髮射纍計數隨界麵均質度增加而增加；同時界麵剪應力分佈麯線隨著界麵均質度增加而趨嚮平滑。
건립혼응토단사랍발수치모의모형，연구료계면균질도변화대단사랍발구건역학성능적영향，획득료랍발구건하재－위이곡선、성발사루계곡선급계면전응력분포곡선등。연구표명：계면균질도변화대랍발구건봉치하재급열화과정영향교대；성발사루계수수계면균질도증가이증가；동시계면전응력분포곡선수착계면균질도증가이추향평활。
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-dis-placement 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 dis-tribution curves show that the shear stress distribution curves tend to be smooth with the increase of the interface heterogeneity.
