Collapse of the Koror-Babeldaob Bridge
|
|
|||||||||||
Bibliographic Details
| Author(s): |
Gary Klein
|
||||
|---|---|---|---|---|---|
| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008 | ||||
| Published in: | IABSE Congress Chicago 2008 | ||||
|
|||||
| Page(s): | 98-99 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2008 | ||||
| DOI: | 10.2749/222137908796291976 | ||||
| Abstract: |
In September 1996, six months after the post-tensioned concrete bridge was retrofitted to correct midspan sag, the main span suddenly collapsed into the Toagel Channel. The investigation led by Wiss, Janney, Elstner Associates (WJE) found that the collapse was due to compression failure of the top flange. The retrofit and restrained thermal expansion substantially increased the compressive stress in the top flange over the main piers. The top flange was vulnerable to delamination because transverse reinforcement was not provided and planar cracking between the closely spaced tendons was especially likely. |
||||
| Keywords: |
bridge box girder collapse post-tensioning segmental construction delamination
|
||||