Tests of Grouting Voids in Post-tensioned Bridges by X-ray Penetration
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Bibliografische Angaben
| Autor(en): |
Lin An
Yaming Zheng Yufeng Zhang Guanhua Fu |
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| Medium: | Tagungsbeitrag | ||||
| Sprache(n): | Englisch | ||||
| Tagung: | 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008 | ||||
| Veröffentlicht in: | IABSE Congress Chicago 2008 | ||||
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| Seite(n): | 434-435 | ||||
| Anzahl der Seiten (im PDF): | 6 | ||||
| Jahr: | 2008 | ||||
| DOI: | 10.2749/222137908796293244 | ||||
| Abstrakt: |
Utilizing the X-ray facilities originally dedicated for nondestructive testing of steel structures, nondestructive tests were carried out to investigate the grouting voids and tendon rupture in post- tensioned prestressing concrete structures. The testing procedure and technical parameters, namely, tube voltage, exposure time, source-to-film distance and sensitivity, for detecting grouting voids in duct are proposed based on the principle of X-ray penetration. The concrete-steel thickness equivalent coefficient is also obtained as about 0.2. Through a systematic study on a large number of radiographs, the approach and procedure to detect the grouting voids in metal or PVC duct (including both round and flat shaped ones) and rupture of tendons are presented. Finally, an investigation of grouting voids by X-ray in a post-tensioned concrete bridge, which is the first time in China, is introduced in this paper. |
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Dichte
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