교량 확폭시 RC 상판 접합부의 휨강도에 관한 실험적 연구

An Experimental Study on the Flexural Strength of Construction Joints of RC Slabs at Widened Bridges

In widening of existing bridges, construction joints between old new parts of concrete slabs are subjected to repeated traffic loads during placing and curing of concrete. Therefore, the main focus of this paper is given to examine several construction methods of bridge widening. As a result, the occurrence of cracks in vibrating specimen is faster than non-vibrating one, but the difference between flexural strength and ultimate moment was negligible. Also, it shows the same result in other construction method, say direct and non-shrinkage joint specimen.