静载下CFRP加固管柱的AE特征信号分析

王朋飞; 石健; 邵永波; 朱红梅

doi:10.13433/j.cnki.1003-8728.20220171

静载下CFRP加固管柱的AE特征信号分析

doi: 10.13433/j.cnki.1003-8728.20220171

1.
西南石油大学机电工程学院，成都　610500
2.
西南石油大学土木测绘学院，成都　610500

基金项目: 四川省青年科技创新研究团队（2019JDTD0017）

详细信息

作者简介:
王朋飞（1994−），硕士，研究方向为机械工程材料及声发射信号处理研究，1251718565@qq.com

通讯作者:
石健，副教授，硕士生导师，jianshia99@aliyun.com

中图分类号: TE58
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- 文章访问数: 56
- HTML全文浏览量: 28
- PDF下载量: 10
- 被引次数: 0
出版历程
- 收稿日期: 2021-10-24
- 刊出日期: 2023-11-30

Analysis of AE Characteristic Signal of CFRP-reinforced Tubular Columns Under Static Loading

1.
School of Mechanical Engineering, Southwest Petroleum University, Chengdu 610500, China
2.
School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, China

摘要

摘要: 为研究腐蚀管柱加固前后的承载力变化，使用声发射仪采集了准静态压缩过程中有腐蚀缺陷和经碳纤维增强复合材料（CFRP）加固的管柱构件的声发射参数。通过比较声发射的撞击数、幅度、均方根植（RMS）、振铃计数率和累积能量计数等参数，对构件的承载力进行了研究。结果表明：声发射特征参数能够较好的体现构件材料的弹性阶段、屈服阶段、强化阶段、颈缩和断裂过程；幅度和RMS可以反映试验过程中试件内部损伤破坏进程；振铃计数和累积能量的变化趋势能够体现管柱构件的压缩变形过程；CFRP加固后的管柱变形小，承载力提高，声发射振铃计数降低，累积能量计数增大。
- 声发射 /
- 腐蚀缺陷 /
- 管柱 /
- 静态压缩 /
- 承载力
Abstract: To study the changes in the bearing capacity of the corroded pipe string before and after reinforcement, the acoustic emission instrument was used to collect the acoustic emission parameters of the tubular column members with corrosion defects and carbon fiber-reinforced polymer(CFRP) reinforcement during the quasi-static compression process. By comparing the number of hits, amplitude, root of mean square(RMS), counts rate, and cumulative energy count of acoustic emission parameters, the bearing capacity of the components was studied. The result shows that the acoustic emission characteristic parameters can better reflect the elastic phase, yielding phase, strengthened phase, necking, and fracture process of component materials. Amplitude and RMS can reflect the internal damage and destruction process of the specimen during the test. The changing trend of acoustic emission counts and acoustic emission accumulated energy can reflect the compression process of tubular columns. The deformation of the tubular columns with CFRP-reinforced is small, the bearing capacity is improved, the acoustic emission count is reduced, and the acoustic emission accumulated energy is increased.
- acoustic emission /
- corrosion defect /
- tubular column /
- static compression /
- bearing capacity

HTML全文

图 1 拉伸试件尺寸

Figure 1. Geometric dimension of a tensile specimen

下载: 全尺寸图片幻灯片

图 2 管柱构件尺寸

Figure 2. Dimensions of tubular column members

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图 3 无 CFRP和有 CFRP加固管柱构件

Figure 3. CFRP-free and CFRP-strengthened tubular column members

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图 4 应力-应变曲线与AE信号

Figure 4. stress-strain curve and the AE signal

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图 5 CFRP加固前后载荷位移曲线对比图

Figure 5. Load-displacement curve comparison before and after CFRP reinforcement

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图 6 各构件不同位置的AE撞击计数变化

Figure 6. The change of AE impact counts at different positions of each component

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图 7 不同构件在轴压下AE时域演化特征

Figure 7. AE time domain evolution characteristics of different components under axial compression

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图 8 短构件撞击计数分布图

Figure 8. AE hit distribution map of short components

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图 9 长构件撞击计数分布图

Figure 9. AE hit distribution of long components

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图 10 载荷-位移与振铃计数和累积能量计数关系

Figure 10. Relationship between load - displacement AE counts and cumulative energy

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表 1 管柱构件尺寸参数

Table 1. Dimension parameters of tubular column members

组号	试件编号	尺寸/mm	长度/mm	腐蚀深度/mm	腐蚀长度/mm	CFRP加固	加固方式
1	S-1A	Ø168 × 5	500	0.3	200	无
2	S-1A-C	Ø168 × 5	500	0.3	200	有	HLHLHL
3	S-2A	Ø180 × 5	1500	0.5	500	无
4	S-2A-C	Ø180 × 5	1500	0.5	500	有	HLHLHL

下载: 导出CSV

表 2 管柱构件承载力对比

Table 2. Comparison of bearing capacities of tubular column members

试件编号	承载力/kN	提升/%
S-1A	961.75
S-1A-C	1273.34	32.4
S-2A	779.53
S-2A-C	990.38	27.0

下载: 导出CSV

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