スパン中央に添筋重ね継手を有するプレキャストRC梁の構造性能

概要

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In this study, bending and shear tests were conducted to understand the seismic performance of reinforced concrete beams formed by joining together two precast beam-end elements at the midspan using cast-in-place concrete with splice-bar joints of main bars. A total of 11 specimens were used, and the parameters were the strength of main bars and cast-in-place concrete, transverse reinforcement spacing and the amount of U-shaped reinforcement in the lap splices region. As a result of the test, a design method for splice-bar joints necessary for flexural yielding of beam ends was developed. Also, a bond splitting strength evaluation method taking into account the effect of U-shaped bars and the influence of the stress gradient, developed by modifying evaluation formulas currently in use, was proposed.
2008-09-30