Wire fractures in locked coil cables
| Autor: | H.I. Lange, B. Isaksen, K. Gjerding-Smith, G. Nærum, B.H. Leinum, R. Johnsen, G. Gundersen |
|---|---|
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Bridge Structures. 2:63-77 |
| ISSN: | 1744-8999 1573-2487 |
| DOI: | 10.1080/15732480600852104 |
| Popis: | Wire fractures in the main cables of the Lysefjord Suspension Bridge display an approximate linear relationship with time. Uncertainties related to wire fractures in sub-layers, reduction of load-carrying capacity and lifetime, and future development of wire fractures have prompted extensive investigations of the main cables. Failure analyses of fractured Z-wire samples and fracture mechanics analysis concluded that cracks have initiated and propagated from surface imperfections. The potential for hydrogen atom generation and absorption that causes hydrogen-induced cracking is discussed. Hydrogen atoms result from the hot-dip galvanization process, or due to corrosion. Evaluation of remaining load-carrying capacity and the need for strengthening of the main cables are briefly discussed and methods for surveillance of wire fractures are presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|