| 冲击下钢筋混凝土桥墩损伤监测试验研究 |
| |
| 引用本文： | 李俊,许斌,樊伟,刘斌,王海东,杨哲铭.冲击下钢筋混凝土桥墩损伤监测试验研究[J].压电与声光,2018,40(1):124-127. |
| |
| 作者姓名： | 李俊 许斌 樊伟 刘斌 王海东 杨哲铭 |
| |
| 作者单位： | (1.湖南大学 土木工程学院，湖南 长沙 410082；2.华侨大学 土木工程学院，福建 厦门 361021；
3.华侨大学 福建省结构工程与防灾重点实验室，福建 厦门 361021；4.海南大学 土木建筑工程学院，海南 海口 570228) |
| |
| 基金项目： | 国际科技合作与交流专项基金资助项目(2014DFE70230);国家自然科学基金青年资助项目（51308202);湖南省科技计划重点基金资助项目(2014TT1006) |
| |
| 摘 要： | 钢筋混凝土桥墩受船舶等撞击后损伤状况的监测对其安全性评估具有重要意义。该文提出一种基于压电应力波传播的钢筋混凝土桥墩损伤状况监测方法,对表面布置有压电陶瓷传感器阵列的钢筋混凝土桥墩缩尺模型进行落锤冲击试验,对比冲击前后简谐激励下测量信号幅值和扫频激励下测量信号小波包能量值,实现试件裂缝损伤监测。监测结果与试件实际开裂情况吻合。结果表明,所提方法能有效地监测桥墩结构在冲击作用后的裂缝损伤状况。
|
| 关 键 词： | 钢筋混凝土桥墩 落锤 压电陶瓷传感器 波动法 裂缝损伤 |
Experimental Study on Crack Monitoring of RC Bridge Piers Under Impact |
| |
| LI Jun,XU Bin,FAN Wei,LIU Bin,WANG Haidong,YANG Zheming.Experimental Study on Crack Monitoring of RC Bridge Piers Under Impact[J].Piezoelectrics & Acoustooptics,2018,40(1):124-127. |
| |
| Authors: | LI Jun XU Bin FAN Wei LIU Bin WANG Haidong YANG Zheming |
| |
| Affiliation: | (1. College of Civil Engineering,Hunan University,Changsha 410082,China;2.College of Civil Engineering,Huaqiao University,Xiamen 361021,China;
3. Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province,Huaqiao University,Xiamen 361021,China;
4.College of Civil Engineering and Architecture,Hainan University, Haikou 570228,China) |
| |
| Abstract: | The monitoring for cracks of reinforced concrete(RC) bridge piers after ship collision plays a key role on the condition and safety evaluation of bridges. In this study, a crack monitoring approach using the stress wave measurement by piezoelectric ceramic(PZT) patches for a RC pier specimen under the free falling weight impact was proposed. The impact test on a scale RC pier specimen with surface mounted PZT patches was carried out and the cracks of the specimen after impacts were detected using the variation of the amplitudes of the stress wave measurement under sinusoidal excitation and the wavelet packet energy of that under sweep signals excitations. The crack monitoring results agreed well with the test observation. The results showed that the proposed method could effectively monitor the crack damage of the pier structure after the impact. |
| |
| Keywords: | reinforced concrete pier falling weight impact PZT wave method crack damage |
|
| 点击此处可从《压电与声光》浏览原始摘要信息 |
|
点击此处可从《压电与声光》下载全文 |
|
