高強度鉄筋SD50の重ね継手に関する実験的研究

概要

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Although Grade SD 50 high strength reinforceing bar has been already standardized by JIS (Japanese industrial standard), it has not yet been applied in the actual buildings. However, recently, along with the development of high-strength concrete, there has been a drift toward using Grade SD 50 bars. When Grade SD 50 bars are used practically, the joints of reinforcements are required. Although there are many methods for the joints of reinforcements, the lap splices are studied in this paper. Many experimental studies on lap splices have been reported. Most of them have been carried out on the reinforcement with strength between Grade SD 30 and SD 40. Few tests on lap splices of Grade SD 50 have been reported. The object of this paper is to obtain the test data (strength, stifness and ductility) with regard to lap splices of Grade SD 50 bars. The simply supported beams loaded with two concentrated loads were used for test. The lap splices were located at the pure bending portion in the beams. Although there are many effective factors for the behavior of lap splices, the effect of the length of lap splices of hooks, and of space in contact lap splices are studied in this paper.
社団法人日本建築学会の論文
1989-11-30