摘要
研究了混凝土三点弯曲梁破坏过程的声发射(AE)特性。结果表明,混凝土梁在三点弯曲受载过程中声发射试验较好的监测了混凝土梁断裂破坏的全过程;在三点弯曲状态下,混凝土梁声发射信号参数经历可以分为4个阶段:初始压密阶段、稳定扩展阶段、起裂阶段和断裂破坏阶段;得到了三点弯曲梁受载过程中声发射损伤定位随时间的变化经历图。
This article studies the concrete three-point bending beam failure process of acoustic emission(AE) characteristics. The results show that the concrete beam in the process of three point bending loading acoustic emission test better monitoring the whole process of the concrete beam fracture damage; In the three-point bending state, the parameters of the concrete beam acoustic emission signal can be divided into four stages: initial compaction stage, stable expansion stage, crack initiation and fracture failure stage. The change of acoustic emission damage localization with time is obtained.
作者
陈忠购
金贤玉
金南国
CHEN Zhonggou, JIN Xianyu, JIN Nanguo(College of Civil Engi. and Architecture, Zhejiang Univ., Hangzhou 310058, Chin)
出处
《低温建筑技术》
2018年第7期37-39,共3页
Low Temperature Architecture Technology
基金
国家自然科学基金项目(51320105013
51478419)
浙江省教育厅科研项目(Y201432780)
关键词
混凝土
声发射(AE)
三点弯曲
损伤定位
concrete
acoustic emission (AE)
three point bending
damage location