| 摘要 |
PROBLEM TO BE SOLVED: To provide a connecting structure for precast floor slabs which facilitates the tension control of a hollow PC steel bar and improves the fatigue resistance of the precast floor slab. SOLUTION: In the connecting structure for connecting precast floor slabs 1, 3 to each other which are constructed over a cross beam 38 disposed in parallel to the other at an interval in a horizontal direction, holes 2, 4 or recessed parts are formed in both of the precast floor slabs 1, 3 to dispose a prestress introducing device 8. The prestress introducing device 8 includes the hollow PC steel bar 6 into which a pushing reaction PC steel bar 7 is pushed to strain the PC steel bar 6. The prestress introducing device 8 is disposed in each of the horizontal holes 2, 4 or the recessed parts of each of the precast floor slabs 1, 3. The holes 2, 4 or the recessed parts are filled with a filling material which is then hardened. A compressive force of the pushing reaction PC steel bar 7 is released and the compressive force is introduced by the hollow PC steel bar 6. Thus, the precast floor slabs 1, 3 adjacent to each other in a horizontal direction are connected in a state that the prestress is introduced in a direction to bring the floor slabs 1, 3 closer. COPYRIGHT: (C)2005,JPO&NCIPI
|
