Experimental Study of Crack Width Control of Pre-cast Concrete Slab of Continuous Composite Girder Bridge

摘要

The construction of the continuous composite girder bridge with two or three I-girder has been increasing in expre ssway due to its economical advantage. In the design of continuous composite girder bridges,one of important design issues is preventing the cracking in the concrete slab subjected to tensile force at intermediate supports. The crack width control design has been adopted,and cast-in concrete with transversely pre-stressing slab has been preferably used. By adopting pre-cast concrete slab,it is expected to shorten the construction period,obtain higher quality and durability. However, the crack width control design method of this type of slab has not been established. In this pa per, through the experiment,cracking behaviors of the pre-cast slab are clarified.