Title:
METHOD OF DAMAGE DETECTION FOR DECKS OF GIRDER BRIDGES USING AN ACTIVELY EXCITED VEHICLE
Document Type and Number:
WIPO Patent Application WO/2021/179350
Kind Code:
A1
Abstract:
A method of vibration-based damage detection for a deck of a concrete girder bridge is provided. First, a test vehicle is parked on the deck to perform the swept sine excitation, and the excitation frequency bandwidth, period and amplitude during the detection process are determined according to test results. Second, according to the design drawings or on-site measurement, the span of bridge, number of girders and spacing of two adjacent girders are acquired. And then, the detection path of the test vehicle can be determined. Third, the test vehicle moves from left end to right end of the bridge according to the detection path. The acceleration of the vehicle is collected. At last, the acceleration is processed by the damage detection algorithm. The algorithm includes following five steps: the measured acceleration is divided into equal segments according to the excitation period; the auto power spectrum is computed for the segmented acceleration response; the amplitude of each auto power spectrum is sampled at equal intervals to form the vector; the similarity coefficient Q of any two vectors are calculated to form a matrix; visual results of the deck are generated by combining the matrix with location data of the test vehicle.
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Inventors:
YI TINGHUA (CN)
ZHANG JIAN (CN)
QU CHUNXU (CN)
LI HONGNAN (CN)
ZHANG JIAN (CN)
QU CHUNXU (CN)
LI HONGNAN (CN)
Application Number:
PCT/CN2020/080989
Publication Date:
September 16, 2021
Filing Date:
March 25, 2020
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
E01D19/12; G01M5/00
Foreign References:
| CN103076393A | 2013-05-01 | |||
| CN101561379A | 2009-10-21 | |||
| CN101923027A | 2010-12-22 | |||
| CN106441748A | 2017-02-22 | |||
| JP2006349628A | 2006-12-28 | |||
| US20180149555A1 | 2018-05-31 | |||
| CN206883678U | 2018-01-16 |
Other References:
XIANG ZHIHAI, DAI, XIAOWEI; ZHANG, YAO; LU, QIUHAI: "The Tap-Scan Damage Detection Method for Beam Structures", CHINESE JOURNAL OF SOLID MECHANICS, vol. 32, no. S, 15 October 2011 (2011-10-15), pages 225 - 228, XP055845786, ISSN: 0254-7805, DOI: 10.19636/j.cnki.cjsm42-1250/o3.2011.s1.037
XIANG ZHIHAI, ZHANG CHENGHAO; LU QIUHAI; LI LIANYOU; SHEN ZHAOPU: "The Tap-Scan Detection Vehicle for Bridges，", PROCEEDINGS OF THE 19TH ANNUAL CONFERENCE OF THE BEIJING SOCIETY OF MECHANIC, 12 January 2013 (2013-01-12), CN, pages 368 - 369, XP055846324
XIANG ZHIHAI, ZHANG CHENGHAO; LU QIUHAI; LI LIANYOU; SHEN ZHAOPU: "The Tap-Scan Detection Vehicle for Bridges，", PROCEEDINGS OF THE 19TH ANNUAL CONFERENCE OF THE BEIJING SOCIETY OF MECHANIC, 12 January 2013 (2013-01-12), CN, pages 368 - 369, XP055846324
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