论文部分内容阅读
和传统钢筋相比,广泛应用于耐腐蚀工程中的表面涂层加工钢筋的粘结性能必然会发生变化,由此产生的对钢筋混凝土(以下简称RC)梁构件的承载机制和破坏模式的影响还未被解明。另外,关于箍筋锈蚀引起的粘结退化对RC梁的抗剪性能的影响,以往的研究存在分歧。鉴于此,本文通过实验就表面涂层纵向受拉钢筋的粘结性能变化以及不同形式箍筋的粘结退化对RC梁的抗剪性能的影响展开研究。研究结果表明:表面涂层加工纵向受拉钢筋的粘结性能变化基本上对RC梁的承载机制、破坏模式以及承载力等承载性能不产生影响;箍筋形式以及其粘结退化与否对RC梁的承载力影响不大,但相对于开口型箍筋,闭合型箍筋对斜裂缝开口进展有更好的约束作用。
Compared with traditional steel bars, the bonding performance of the surface coating steel bars that are widely used in corrosion-resistant works is bound to change, and the resulting influence on the bearing mechanism and failure mode of the reinforced concrete (RC) beam members Has not yet been explained. In addition, there are differences in the previous studies on the influence of bond degradation caused by corrosion of stirrups on the shear properties of RC beams. In view of this, this paper studies the influence of the bond properties of the longitudinal tensile reinforcement of the surface coating and the bond degeneration of the different forms of stirrup on the shear resistance of the RC beam. The results show that the change of the bonding properties of the longitudinally stretched steel bars in the surface coating basically has no effect on the bearing capacity, failure mode and bearing capacity of the RC beams. The stirrups, The bearing capacity of the beam has little effect, but the closed stirrups have a better restraining effect on the progress of the oblique crack opening than the open stirrup.