On-Site Acoustic-Emission Monitoring for a Prestressed Concrete BT-54 AASHTO Girder Bridge

被引：23

作者：

Anay, Rafal ^{[1
,2
]}

Lane, Abram ^{[3
]}

Jauregui, David V. ^{[4
]}

Weldon, Brad D. ^{[4
]}

Soltangharaei, Vafa ^{[2
]}

Ziehl, Paul ^{[2
]}

机构：

[1] Northern Tech Univ, Dept Bldg & Construct Engn, Mosul 41001, Iraq

[2] Univ South Carolina, Dept Civil & Environm Engn, 300 Main St, Columbia, SC 29208 USA

[3] Henningson Durham & Richardson Inc, Engn Co, 5329 Morning Glory Rd, Highlands Ranch, CO 80130 USA

[4] New Mexico State Univ, Dept Civil Engn, Hernandez Hall,MSC 3-CE,POB 30001, Las Cruces, NM 88003 USA

来源：

JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES | 2020年 / 34卷 / 03期

关键词：

Load testing; Nondestructive evaluation (NDE); Acoustic emission (AE); Prestressed concrete bridges; Inclined cracking; Shear; Modified compression field theory (MCFT); DAMAGE; BEAMS; IDENTIFICATION; CLASSIFICATION; MECHANISMS; BEHAVIOR;

D O I：

10.1061/(ASCE)CF.1943-5509.0001440

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Acoustic emission (AE) data were investigated to better understand damage conditions in a three-span prestressed concrete girder bridge during a load test. The innovation lies in classification of crack extensions (stable or unstable) during the loading and holding processes. The gap in current literature addressed is a shortage of data and findings on bridges in operation and having inclined cracks. This manuscript addresses processing of AE signals recorded by piezoelectric sensors attached on two interior girders toward the obtuse corner of the bridge while under loading. Results showed indications of crack propagation beyond the existing cracks during both loading and load holds. Damage classification procedures based on AE data recorded during one loading and holding step are discussed. Shear strength analysis using modified compression field theory (MCFT) was performed to place the results in the context of potential overloads.

引用

页数：14

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