Title:
BRIDGE DAMAGE IDENTIFICATION METHOD BASED ON LONG-GAUGE-LENGTH STRAIN INFLUENCE ENVELOPE
Document Type and Number:
WIPO Patent Application WO/2017/202139
Kind Code:
A1
Abstract:
A bridge damage identification method based on a long-gauge-length strain influence envelope. The method comprises the following steps: constructing a distributed long-gauge-length strain sensing monitoring system; when a vehicle crosses a bridge, collecting data; decomposing the collected data; extracting a long-gauge-length strain influence envelope of a bridge; and identifying a bridge damage and estimating a bearing capacity state. By using a strain influence line coefficient as a damage indicator and using a long-gauge-length strain sensor, strain information of the bridge when the vehicle crosses the bridge is measured; and a long-gauge-length strain time history is decomposed by using an empirical mode decomposition method, a static strain component extraction criterion is put forward, and a strain influence envelope of the bridge is formed by means of the extracted maximum static strain value, so as to determine a bearing capacity state of the bridge. During the implementation, the traffic does not need to be closed; and by running the long-gauge-length strain time history under a vehicle, the rigidity distribution condition of the bridge can be rapidly detected.
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Inventors:
WU GANG (CN)
WU BITAO (CN)
WU BITAO (CN)
Application Number:
PCT/CN2017/078697
Publication Date:
November 30, 2017
Filing Date:
March 30, 2017
Export Citation:
Assignee:
UNIV SOUTHEAST (CN)
International Classes:
G01M99/00; G01B21/32
Domestic Patent References:
| WO2015074721A1 | 2015-05-28 |
Foreign References:
| CN105973627A | 2016-09-28 | |||
| CN101221104A | 2008-07-16 | |||
| CN104198144A | 2014-12-10 | |||
| CN102032876A | 2011-04-27 | |||
| US20150226633A1 | 2015-08-13 |
Other References:
ZHOU, YI ET AL.: "GIRDER STRAIN ANALYSIS OF A CABLE-STAYED BRIDGE", JOURNAL OF VIBRATION AND SHOCK, vol. 30, no. 4, 31 December 2011 (2011-12-31), pages 232, ISSN: 1000-3835
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM (ORDINARY PARTNERSHIP) (CN)
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