【摘要】 为了解再生粗骨料高强混凝土柱的压弯力学性能,进行了4根大尺寸钢筋混凝土柱大偏心受压重复荷载试验,包括方形与圆形两种截面柱,方形截面边长为600 mm×600 mm,圆形截面直径为675mm。研究变化参数为再生粗骨料取代率。在试验基础上,分析了其破坏特征、承载力、刚度及截面应变发展规律。结果表明,不同截面形式的再生粗骨料高强混凝土柱,其大偏压破坏过程、破坏形态、刚度退化、截面应变发展规律与普通混凝土柱的没有明显区别。参照现行混凝土结构设计规范的相关设计公式计算其极限承载力,计算结果与试验结果符合良好,计算精度能够满足工程要求。更多还原

【Abstract】 To investigate the axial-flexural behavior of high strength concrete columns made of recycled coarse aggregate,this paper presents a repeated large eccentric loading test on four large size reinforced concrete columns. Two kinds of cross-section columns were included,one is square cross section with the size of 600 mm × 600 mm,the other is circular cross section with the diameter of 675 mm. The variable parameter is the replacement ratio of recycled coarse aggregate. Based on the test,the failure characteristics,load-bearing capacity,stiffness and the regularities of development for section strain were analyzed. Results show that the difference about failure process,failure modes,degradation of stiffness and the regularities of development for section strain between recycled concrete columns and normal concrete columns are not obvious. The ultimate load-bearing capacity of recycled coarse aggregate columns were calculated by the related calculating formula in the code for design of normal concrete structures.The calculated results agree well with the measured results. It is indicated that the calculated accuracy can meet the engineering requirements.更多还原