Paper by KODAMA KONDO GOTO IWASHITA from ISCR 10th 2006 Brussels Belgium
Shonan Ohashi Bridge that is on Route 134 is a steel box girder bridge of 530m in length. Six years ago, fatigue cracks were found at the welding tips of bottom deck plates. After the full inspection of the asphalt pavement and steel deck bridge, it was found that the bridge was needed to be reinforced. In order to prevent the fatigue damages caused by the heavy traffic, it was decided the position of the traffic lane should be shifted by 50cm toward the sidewalk and the steel fiber reinforced concrete (SFRC) should be laid on the existing steel deck using epoxy adhesives for the purpose of increasing the rigidity of the deck plates. The construction work was conducted from 9 PM to 6 AM under the full traffic restriction every night excluding Saturday and Sunday nights and rainy nights through October to December 2005. This report describes the experimental studies of SFRC paving as the practical rehabilitation method of the steel deck plate bridges against the fatigue damages and the results of construction work on Shonan Oohashi Bridge.