端部RC梁主筋と中央H形鋼をプレート接合した複合梁の開発

摘要

梁端部をRC乱　中央部をS造で構成される複合梁に関して，境界プレートを介して異種構造を接合する方法を提案した。接合方法は，中央S梁を境界プレートに溶接接合し，端部RC造主筋をS梁と反対側に溶接接合することにより曲げ応力を伝達させ，スタッドコネクタによりせん断応力を伝達させる。提案した接合方法に関して端部RC中央S複合構造梁の曲げ実験を行い，埋込む接合方法と構造性能を比較検討した。%The mixed structures composed of reinforced concrete (RC) columns and steel (S) beams are effective for long spans. Lots of beam-column joint details have been developed. These joints need particular arrangements to transmit stresses between S-beams and RC-columns. In addition, the concrete casting may be inefficient to construct dense concrete joints. The hybrid beams that consist of RC beam-ends and S beam-center could be practical instead of S beams, because beam-column joints may be constructed in pre-cast concrete members. There are some researches on the hybrid beams. In many cases, those H-shaped steel beams are embedded in reinforced concrete beam ends, and large leverage shear stresses are occurred at the connections.rnAuthors have proposed new connecting way for the hybrid beams, utilizing the boundary steel plate between RC and S-beam instead of the way embedded steel in Robeam. This paper reports the stress transforming mechanism of new method and the test results of the proposed hybrid beams.