カプラー上にせん断補強筋を配さないRC梁工法の開発: 靱性保証型耐震設計指針せん断強度式の適用性の検証

摘要

カプラー上にせん断補強筋を配さないRC染部材を実用化するため靭性指針せん断強度式にカプラー区間の構造詳細を考慮する方法を提示した。カプラーの有無，長さ，位置，および，カプラー上のせん断補強筋の有無などを変動因子とする縮尺1/2のRC梁試験体の静的載荷実験を通して，本工法の適用が梁のせん断強度に与える影響と，提案したせん断強度の評価方法の適用性について検討した。%RC beams without stirrups on couplers were tested to investigate the shear performance. Seventeen specimens were designed and constructed with different structural details such as existence of coupler, coupler length, location of coupler, and existence of stirrups on coupler. In particular, the existence of standard couplers did not significantly affect on beam shear strengths unless stirrups located at the ends of couplers yielded. Moreover, a method to consider the specific details of this kind of structure in the AIJ design equations was presented to evaluate the shear strengths. Its applicability was examined through the test results.