| 摘要 |
PROBLEM TO BE SOLVED: To provide a connected joint structure which effectively prevents collapse and properly absorbs bending stress, eliminating an unconnected structure typically such as a finger joint.SOLUTION: In a joint structure of concrete floor slab ends of a bridge, a stepped down part 5 is arranged in the upper part of an expansion gap 3 formed between ends of concrete floor slabs 1 and 2 or an expansion gap 3 between end of a concrete floor slab 1 and a bridge abutment 2. A fiber reinforced cement mortar 8 is installed in the stepped down part 5 to form a rigid connection joint 9. An indefinitely large number of fine cracks 10 are induced in the surface layer 8a of the fiber reinforced cement mortar 8 by bending stress applied to the rigid connection joint 9, while reinforcement fibers 11 cross-linking for connection in the fine crack 10 absorb the bending stress. |
