摘要
文中对加筋混凝土梁进行三点弯曲断裂试验与声发射试验,同时采用普通混凝土梁作为对照组;引入上升角与平均频率,分析普通混凝土小梁与加筋混凝土小梁的损伤模式;对损伤声发射信号进行傅里叶变换,分析加筋混凝土小梁损伤的频谱特征.结果表明:加筋混凝土试件整体强度更高,在破坏前的声发射信号更加强烈;钢筋的加入使得试件损伤主要以剪切破坏为主;加筋混凝土小梁的损伤频谱范围较普通小梁更加集中,并且呈现多峰值主频的特征,主频幅值也更高.
Three-point bending fracture test and acoustic emission test were carried out on reinforced concrete beams,and ordinary concrete beams were used as control group.The rising angle and average frequency were introduced to analyze the damage modes of ordinary concrete beams and reinforced concrete beams.Fourier transform was used to analyze the spectrum characteristics of damage of reinforced concrete trabecular.The results show that the overall strength of reinforced concrete specimens is higher,and the acoustic emission signal before failure is stronger.With the addition of steel bars,the damage of specimens is mainly shear failure.The damage spectrum range of reinforced concrete trabecular is more concentrated than that of ordinary trabecular,and it shows the characteristics of multi-peak main frequency,and the amplitude of main frequency is also higher.
作者
王国清
秦禄生
何兆益
周翰林
杨康
WANG Guoqing;QIN Lusheng;HE Zhaoyi;ZHOU Hanlin;YANG Kang(Hebei Transportation Investment Group Corporation,Shijiazhuang 050091,China;Chongqing Jiaotong University College of traffic and transportation,Chongqing 400074,China;Survey and Design Company of Sichuan Road&Bridge(Group)Company,Chengdu 610041,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《武汉理工大学学报(交通科学与工程版)》
2025年第1期150-154,159,共6页
Journal of Wuhan University of Technology(Transportation Science & Engineering)
基金
科技部重点专项(SQ2020YFF0402188)。
关键词
加筋混凝土梁
三点弯曲
声发射
损伤特征
reinforced concrete beam
three point bending test
acoustic emission
damage study
