[2092] Influence of sectional pre-crack on shear strength of RC beams
キーワード：shear strength, RC beam, sectional pre-crack, 3-D RBSM, Z-shape crack
In order to investigate the influence of crack through section, which often generates under cyclic loading, on shear behavior and strength of RC beam, a RC beam with a 1.0 mm pre-crack in a section (the effective depth away from loading point) was tested. It was found that the pre-crack led to a significant degradation of shear strength by comparing with the non-cracked beam. Moreover, the production of sectional pre-crack and its influence on shear strength were simulated by 3-D RBSM analysis. At last, the different shear cracking behavior and strength between the pre-cracked and non-cracked beams were clarified.