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中文摘要：
为了研究型钢再生混凝土（SRRAC）梁的受力性能，设计6个试件进行静力加载试验，考虑了再生粗骨料取代率和混凝土强度等级两个变化参数。通过试验，观察了该类梁的裂缝形态和破坏特征，获取其受力破坏全过程荷载一挠度曲线、截面的应变分布、极限承载力等重要参数；深入分析了再生粗骨料取代率、混凝土强度对型钢再生混凝土梁受力性能的影响规律；基于试验数据，探讨了型钢再生混凝土梁的正截面承载力计算方法。研究结果表明：再生粗骨料取代率对型钢再生混凝土梁的承载能力有一定的影响，随着取代率的增加，型钢再生混凝土梁的承载力有所提高，提高的幅度为5．95％～17．63％；受力过程中截面的应变分布符合平截面假定，型钢再生混凝土梁具有良好的承载能力和变形性能。最后，提出了型钢再生混凝土梁正截面极限承载力计算方法，研究结果可供相关科学研究和工程应用参考。
英文摘要：
In order to reveal the flexural behavior of steel reinforced recycled coarse aggregate concrete beams, 6 specimens were designed for flexural test. The study considered two impact parameters, which are coarse aggregate replacement rate and concrete strength grade. Through this test, the whole mechanical process, crack distribution and failure behavior of this kind of specimens were observed, and obtained the stress-strain distribution curves, the ultimate bearing capacity and load-displacement curves parameters. Based on the test data, the impact of coarse aggregate replacement rate and concrete strength grade on the mechanical behavior of steel reinforced recycled coarse aggregate concrete beams was deeply analyzed. The result shows that the replacement rate influences the bearing capacity of steel reinforced recycled concrete beams, and with replacement rate increases, the bearing capacity increases from 5.95% to 17.63%; during loading process the section strain agreed with the plane section assumption, and the beams have good bearing capacity and deformation performance. Finally, put forward normal section strength calculation method of steel reinforced recycled coarse aggregate concrete beams. The research conclusions can be a help to relevant study and engineering application.
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