会议专题

STUDY ON ACOUSTIC EMISSION CHARACTERISTICS OF REINFORCED EFFECT OF BOLT TO FRACTURE UNDER UNIAXIAL TENSILE CONDITIONS

Laboratory tests on acoustic emission (AE) characteristics of modified cement mortar with three-dimensional through crack and anchorage arc carned out under the conditions of umaxial tensile loading. Stress-time curve and the relations of time with AE characteristics are obtained. In an effort to analyze the complete failure process of the specimen, the experimental results show that the effect of strengthening and crack arrest of bolt to fracture is obvious. In addition, AE parameters, e.g., energy and hit number, can reflect exactly the trend of stress. Furthermore. Jumping phenomenon occurs corresponding to the change law of stress-time. Besides,very little energy is released in linear elastic stage. AE energy is released continuously in the process of the bolt being pulled out from specimen. AE activity also occurs mainly in the process of the bolt being pulled out from specimen. From the location point of view, AE activity mainly concentrates in the end of the bolt slipping.

NING ZHANG SHU-CAJ LI MING-TIAN LI LEI YANG HUAI-FENG SUN MINGTIAN LI FENG SHEN

Geotechnical and Structural Engineering Research Center, Shandong University Jinan, 250061, P.R.Chin Department of Civil Engineering, Shandong Jiaotong University Jinan, 250023, P.R.China Nanjing Feng Hui Composites Co., Ltd Nanjing, 211124, P.R.China

国际会议

The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)

大连

英文

107-112

2009-08-21(万方平台首次上网日期,不代表论文的发表时间)