安徽理工大学土木建筑学院
国家自然科学基金项目（面上项目，重点项目，重大项目）；安徽理工大学引进人才基金项目；研究生创新基金
School of Civil Engineering and Architecture, Anhui University of Science and Technology
为研究温度和剪切速率对树脂锚固界面破裂机制的影响，利用变温剪切试验装置对锚固试件进行剪切试验.并基于数字相关技术（DIC）和扫描电镜（SEM）分析了剪切界面裂隙演化机制和微观破坏特征.结果表明：锚杆-锚固剂界面的峰值剪应力，随着温度和剪切速率的增大而减小.随着锚杆肋角的增大，锚固界面的爬坡现象逐渐减弱，锚杆-锚固剂界面的峰值剪应力逐渐增大.温度、剪切速率及岩石抗压强度对锚固剂-岩石试件的裂隙演化和锚固剂-岩石界面的峰值剪应力变化规律均有较大影响.研究结果为分析锚固界面的失效机理，提供了参考价值.
In order to study the effects of temperature and shear rate on the fracture mechanism of resin anchorage interface, a variable temperature shear test device was used to shear test the anchor specimens. Based on digital correlation technique (DIC) and scanning electron microscopy (SEM), the evolution mechanism and microscopic failure characteristics of shear interface cracks were analyzed. The results show that the peak shear stress at the interface between anchor and anchoring agent decreases with the increase of temperature and shear rate. As the rib angle of the bolt increases, the climbing phenomenon at the anchoring interface gradually weakens, and the peak shear stress at the anchor-anchor interface gradually increases. Temperature, shear rate and rock compressive strength have great effects on the fracture evolution of anchorage-rock specimens and the variation of peak shear stress at anchorage-rock interface. The results of this study provide a reference value for the analysis of the failure mechanism of the anchoring interface.
