The experimental investigation was carried out to study the influence of dowel force of longitudinal flexural reinforcement of concrete beams. Due to intricacy involved in shear transfer mechanism accurate predictions of shear behavior was difficult to evaluate. The influence of shear in uncracked compression zone, aggregate interlocking, stirrups is well understood but contribution of dowel force was not clearly represented despite implied belief that dowel force is an important constituent in shear resistance. The idea of present study is to appraise shear resistance arising from dowel force with varying flexural reinforcement with shear reinforcement provided. A total of eight beams were cast and verified as parametric study. Four beams were provided with preformed diagonal tension cracks and another four beams were conventional beams. The study was carried out by keeping shear span to depth ratio and clear cover constant. Results obtained was studied from moment vs. displacement curve and strain vs. moment curve and compared with existing empirical formulas. It was noticed that aggregate interlocking is insignificant with shear reinforcement provided and beams with preformed diagonal tension cracks had exhibited greater structural behavior when compared to conventional beams.

进行了实验研究，以研究销钉力对混凝土梁纵向抗弯加固的影响。由于剪切传递机制涉及复杂性，因此很难评估剪切行为的准确预测。众所周知，在未破裂的压缩区中，剪切的影响，骨料互锁，箍筋的影响，但是尽管隐含地相信销钉力是抗剪力的重要组成部分，但销钉力的贡献却无法清楚地体现出来。本研究的想法是评估由榫钉力产生的抗剪强度，其中所提供的抗剪钢筋具有不同的抗弯强度。总共投射了八束光束，并进行了参数研究验证。四个梁具有预成型的对角拉伸裂缝，另外四个梁是常规梁。该研究是通过保持剪切跨度与深度之比和保持透明覆盖层恒定而进行的。从力矩-位移曲线和应变-力矩曲线研究了获得的结果，并与现有的经验公式进行了比较。注意到，与提供的抗剪加固相比，骨料的互锁作用微不足道，与常规梁相比，具有预成型对角张力裂缝的梁表现出更大的结构性能。