配置500 MPa箍筋的混凝土梁抗剪性能试验研究

Experimental Study on Shear Behavior of Concrete Beam Reinforced With 500 MPa Stirrup

摘要:

对12根配置500 MPa箍筋的钢筋混凝土梁进行抗剪性能试验，并对其抗剪性能、裂缝宽度和挠度进行分析.在分析结果的基础上，对《混凝土结构设计规范》（GB 500102010）提出相应的修改意见.试验与分析结果表明:《混凝土结构设计规范》能很好地预测高强箍筋混凝土梁的抗剪承载力；在验算正常使用极限状态时，抗剪强度设计值不应超过《混凝土结构设计规范》设计值的80%；在应用《混凝土结构设计规范》计算构件受剪切产生的挠度时，应考虑剪切变形的影响.

Abstract:

Twelve concrete beams reinforced with 500 MPa stirrups were tested and some relevant factors including shear behaviors, crack width and deflections were analyzed. Based on analysis results, some corresponding suggestions to “Code for design of concrete structures”(GB 50010—2010) were put forward. It is shown that the code can precisely predict the shear capacity of highstrength concrete beams. In serviceability limit states, the design value of shear strength cannot exceed 80% of that in the code. Moreover, the effects of shear deformation should be considered when caculating the deflection of the member subjected to shear deformation with the code.