%0 Journal Article
%T On the Acoustic Emission Characteristics of Concrete Fracture Subjected to Three-Point-Bending<br>混凝土材料三点弯曲破坏的声发射特性
%A ZHANG Xuan-zi
%A CHEN Hong-qian
%A WANG Zhi-yong
%A <br>张璇子
%A 陈红迁
%A 王志勇
%J 实验力学
%D 2010
%I 
%X In order to study acoustic emission signal characteristics of gravel concrete materials under different stress states, three-point-bending test of concrete beam was carried out on a MTS testing machine, and advanced multi-channels acoustic emission system was used to detect the fracture process of concrete beams subjected to three-point-bending loading. Concrete material fracture process may be divided into seven kinds based on filtering the signal emission duration, the counts and the hit numbers. According to the results of former experimental study about concrete material Kaiser effect, it was indicated that different kinds of acoustic emission signal corresponded to different relative stress levels. Results show that emission duration, counts and hit number of acoustic emission signals can not only characterize the concrete failure process types, but also characterize the concrete stress state. It provides a new way for on-line monitoring concrete material.
%K concrete
%K three-point-bending experiment
%K acoustic emission
%K relative stress level<br>混凝土
%K 三点弯曲
%K 声发射
%K 相对应力水平
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=49067A0A0D864088C06A84AACB51A5B2&aid=24770FD1510D0494B3B97FC66E0DC722&yid=140ECF96957D60B2&vid=C5154311167311FE&iid=E158A972A605785F&sid=D0E8F9CBDBE0070C&eid=8C5DE51F0A009A0F&journal_id=1001-4888&journal_name=实验力学&referenced_num=0&reference_num=0