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为推广HRB500级钢筋,并为其在《混凝土结构设计规范》局部或全面修订时列入提供依据,需对HRB500级钢筋混凝土构件性能进行试验研究。在4根HRB500级钢筋混凝土偏心受压柱试验的基础上,分析了HRB500级钢筋和高强混凝土匹配下的偏心受压柱的破坏形态、变形特点和承载性能。结果表明:其破坏特征、挠曲模式及截面应变分布与普通高强混凝土柱基本一致。但其混凝土强度较高时正截面承载力较理论计算结果偏小。
In order to promote HRB500 steel bars and provide the basis for its inclusion in the partial or comprehensive revision of “Code for Design of Concrete Structures”, the performance of HRB500 reinforced concrete members needs to be studied. Based on the test of four HRB500 reinforced concrete eccentric compression columns, the failure morphology, deformation characteristics and bearing capacity of eccentric compression columns with HRB500 steel bars and high strength concrete are analyzed. The results show that the failure characteristics, flexural modes and cross-sectional strain distributions are basically consistent with that of common high-strength concrete columns. However, when the concrete strength is higher, the bearing capacity of normal section is smaller than the theoretical calculation.