作　　者： ; ;

机构地区： 嘉应学院土木工程学院

出　　处： 《嘉应学院学报》 2009年第6期48-50,共3页

摘　　要： 在声发射试验系统上,进行了花岗岩声发射实验,获得了静载下花岗岩破坏的声发射规律。结果表明,在加载初期,出现了一定量的声发射信号,声发射计数最大达到2 000,这对应着岩石初始裂纹的闭合段;随着应力继续增大,声发射能量增大量较小,声发射计数逐步增大至峰值,这对应着岩石弹性段;岩石进入损伤阶段后,声发射能量迅速增大,在应力最高点附近,声发射能量达到峰值,而声发射计数却下降至较低值,这种低频大试件往往意味着结构的破坏。 The AE experiments of granite were made on the AE test systems and the AE law under static loading is obtained. The results show that the AE information is rich and the AE counts reach 2000 in the initial stage, which corresponds to rock initial cracks closure; AE energy increment is small and AE counts increases gradually with the stress increasing, which corresponds to rock elastic stage; when rock enter damage stage, AE energy increases rapidly and reaches peak value near the stress peak, but AE energy peak does not correspond to AE counts peak.

关 键 词： 花岗岩 声发射 能量 计数

领　　域： [建筑科学] [建筑科学]