纵筋锈蚀的无腹筋简支梁抗剪性能试验研究

Experimental Research on Shear Capacity of Simple Supported Concrete Beam with Corroded Longitutal Reinforcements

通过6根锈蚀程度不同的钢筋混凝土简支梁和2根无锈蚀对比梁抗剪性能试验,研究了锈蚀钢筋混凝土简支梁斜截面破坏过程和特征,结果表明:纵筋锈蚀造成混凝土和钢筋之间粘结能力下降,纵筋和混凝土之间容易出现滑移,裂缝开展较快;纵筋锈蚀降低了受弯构件抗弯刚度和受剪承载力。

Through the experiment of 6 corroded reinforced concrete beams without stirrups and 2 uncorroded reinforced concrete beams without stirrups, the effect of corrosion rate of longitudinal reinforcement on deformation, crack forming and development, bearing capacity of the simply supported reinforced concrete beams without stirrups are investigated. The test results show that the corrosion of the longitudinal reinforcements reduces the bonding ca- pacity between the longitudinal reinforcement; a slippage is easily resulted between the longitudinal reinforcement and concrete;the crack is rapidly developed and the shear strength and bending stiffness of the beams are de- creased.