混凝土轴压受载声发射特征及失稳演化过程研究

杨亚晗; 于泽明; 李参天; 朱成发; 王炳树; 张春会; 于志兵; 欧阳韦; 张新为

doi:10.3724/j.gyjzG24010402

混凝土轴压受载声发射特征及失稳演化过程研究

doi: 10.3724/j.gyjzG24010402

1. 北京科技大学, 北京 100083;
2. 北京建筑材料检验研究院股份有限公司, 北京 100041;
3. 北京建筑材料科学研究总院有限公司, 北京 100041;
4. 华北水利水电大学, 郑州 450045;
5. 河北科技大学, 石家庄 050018;
6. 四川省交通建设集团有限责任公司, 成都 610047;
7. 中电建路桥集团有限公司, 北京 100044;
8. 中建路桥集团有限公司, 石家庄 050000

详细信息

作者简介:
杨亚晗,男,1997 年出生,硕士,助理工程师,主要从事工程质量控制及灾害防治工作及研究。电子信箱: yangyahan1997@126.com

计量
- 文章访问数: 33
- HTML全文浏览量: 5
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2024-01-04
- 网络出版日期: 2024-04-23

Study on Acoustic Emission Characteristics and Instability Evolution Processes of Concrete Under Axial Compression

1. University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Building Materials Testing Academy Co. Ltd., Beijing 100041, China;
3. Beijing Building Materials Academy of Sciences Research, Beijing 100041, China;
4. North China University of Water Resources and Electric Power, Zhengzhou 450045, China;
5. Hebei University of Science and Technology, Shijiazhuang 050018, China;
6. Sichuan Transportation Construction Group Co., Ltd., Chengdu 610047, China;
7. Power China Road Bridge Group Co., Ltd., Beijing 100044, China;
8. CSCEC Road and Bridge Group Co. Ltd., Shijiazhuang 050000, China

摘要

摘要: 桥梁桩基混凝土承受轴向压载过大,其内部破坏开裂过程会释放弹性波,为量化压载失稳演化过程特征,通过现场原位钻取桥梁桩基结构芯样,采用轴向压载与声发射同步监测试验,研究混凝土试件加载全过程声发射时空演化特征,分析混凝土材料压载失稳破坏全过程与声发射振铃计数、能量释放、震源定位等表征参数的演化关系,获得加载过程与声发射特征关联性的定量描述,分析其失稳演化过程。研究结果表明:轴向压载条件下混凝土试件的应力与声发射振铃计数、能量释放随时间的变化规律具有一致性,声发射定位点主要在剪应力集中区形成宏观"定位带"与混凝土裂缝发展及破坏表现一致,可根据声发射事件活跃度量化判断混凝土受载阶段,反映混凝土失稳临界特征,对桩基混凝土服役监测具有重要意义。
- 桩基混凝土 /
- 声发射特征 /
- 振铃计数 /
- 能量 /
- 失稳演化过程
Abstract: The concrete of bridge pile foundations always bear excessive axial loads, and accompanying with its internal failure and crack process, elastic waves will be emitted. In order to quantify the characteristics of the entire instability evolution process of concrete, the temporal and spatial evolution characteristics of acoustic emission in the whole loading process of concrete specimens drilled in situ from bridge pile foundation structures were studied and synchronous monitoring tests of axial compression and acoustic emission were conducted. The relation between the whole process of compressive instability and the acoustic emission ringing counts, energy release, focal locations and other characterization parameters were analyzed. Then, a quantitative description of the correlation between the loading process and acoustic emission characteristics was obtained, and its instability evolution process was analyzed. The results indicated that the stress of concrete specimens under axial compression was consistent with the change law of the acoustic emission ringing counts and energy release with times, and the acoustic emission positioning points mainly located in a macro "positioning zone" in the shear stress concentration area, which was consistent with the development and failure of concrete cracks. The loading stage of concrete could be quantitatively judged according to activity of acoustic emission, which could reflected the critical characteristics of concrete instability, and was of great significance to service monitoring of pile foundation concrete.
- pile foundation concrete /
- acoustic emission characteristic /
- ringing count /
- energy /
- instability evolution process

HTML全文

参考文献(18)

[1]	谢和平,彭瑞东,鞠杨.岩石变形破坏过程中的能量耗散分析[J].岩石力学与工程学报,2004,23(21):3565-3570.
[2]	岳清瑞,徐刚,刘晓刚.桥梁裂缝智能识别与监测方法研究[J/OL].中国公路学报:1-22[2023-12-25 ].https://link.cnki.net/urlid/61.1313.U.20231207.1345.006
[3]	岳清瑞,施钟淇,崔文惠,等.基于"风险源-承灾体-减灾力"的"防-诊-治-应"城市安全技术体系[J].工业建筑,2023,53(9):1-9.
[4]	BENABOUD S, TAKARLI M, POUTEAU B, et al. Fatigue damage monitoring and analysis of aged asphalt concrete using acoustic emission technique[J/OL]. Road Materials and Pavement Design,2021,22(S1)[2023-12-25]. https:doi.org/10.1080/14680629.2021.1912813.
[5]	MENG Q B, ZHANG M W, HAN L J, et al. Effects of acoustic emission and energy evolution of rock specimens under the uniaxial cyclic loading and unloading compression[J]. Rock Mechanics and Rock Engineering, 2016, 49:3873-3886.
[6]	王岗,潘一山,李忠华,等.煤岩破裂裂纹演化过程声-电信号时频特征研究[J].煤炭科学技术,2018,46(10):90-98.
[7]	吕进国,张建卓,丁鑫,等煤体单轴压缩感应电荷时频演化规律与失稳破坏电荷评价指标[J].煤炭学报,2019,44(7):2074-2086.
[8]	赵扬锋,荆刚,程传杰,等.含裂隙砂岩破裂特征及微震和电荷感应信号规律试验研究[J].振动与冲击,2020,39(23):211-219 ,233.
[9]	赵林锁,郑文红,王岗,等.煤体电荷感应信号评价冲击危险性试验研究[J].安全与环境学报,2021,21(1):187-194.
[10]	任建喜,景帅,张琨.冲击倾向性煤岩动静载下破坏机理及声发射特性研究[J].煤炭科学技术,2021,49(3):57-63.
[11]	李炜强,许沁舒,成功,等.单轴压缩下砂岩微破裂演化力学行为研究[J].煤炭科学技术,2020,48(11):60-67.
[12]	许海亮,任合欢,宋义敏.红砂岩单轴压缩条件下震源时空演化特征及破裂机制实验研究[J].实验力学,2022,37(1):63-76.
[13]	吕祥锋,王玉肖,陈艳,等.管状碳钢轴压变形吸能特征试验研究[J].实验力学,2022,37(3):407-418.
[14]	宋朝阳,纪洪广,张月征,等.不同粒度弱胶结砂岩声发射信号源与其临界破坏前兆信息判识[J].煤炭学报,2020,45(12):4028-4036.
[15]	纪洪广,刘翔宇,曾鹏,等.高强混凝土单轴压缩声发射频率特征试验研究[J].应用声学,2016,35(3):248-254.
[16]	刘娟红,周昱程,纪洪广.单轴加卸载作用下井壁混凝土能量演化机理[J].煤炭学报,2018,43(12):3364-3370.
[17]	朱子辉,郭佳奇,孙飞跃,等.不同含水状态裂隙砂岩声发射及裂纹扩展试验研究[J].高压物理学报,2023,37(5):89-99.
[18]	樊玉峰,肖晓春,丁鑫,等.岩煤结构静动组合加载试验系统研制及应用[J].中国矿业大学学报,2023,52(3):502-512.