| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a crack inducing joint structure for a reinforced concrete beam in which cracks are induced in the inside of a beam material, by providing an internal joint formed by separably embedding two plates in the central part of the beam material.SOLUTION: A crack-induced structure is provided for a reinforced concrete beam having multiple main reinforcement bars extending in the longitudinal direction. The structure is configured by: forming an external joint 10at least in a portion of places where one virtual cross section S perpendicular to the longitudinal direction of a concrete beam material intersects with the surface of a beam body 4; forming an internal joint 10formed by embedding two plates 12 perpendicular to the longitudinal direction and separably overlapped in the center of the virtual cross section; and inserting multiple main reinforcement bars 6 in an intermediate area between the external joint and the internal joint, and thereby inducing cracks by making the stacked surface of two plates 12 as a boundary.</p> |
