The repeated load tests of five recycled coarse aggregate concrete composite beams and two normal concrete composite beams were carried out to investigate the flexural behavior of recycled coarse aggregate concrete composite beams with closed-section steel deck. Based on the tests, the flexural behavior of recycled coarse aggregate concrete composite beams with different shear studs' layout, slab thickness and steel shape was analyzed and compared with that of normal concrete composite beams. The analysis working was mainly focused on yield load, ultimate load, deformation, the slippage between the steel shape and composite slab and damage process of the composite beams during the test. The test results show that the failure modes of recycled coarse aggregate concrete composite beams and normal concrete composite beams are similar. Based on the experimental results, the calculating formulas of the bearing capacity and the deformation of recycled coarse aggregate concrete composite beams with closed-section steel deck were presented with reference to the normal concrete composite structure design code. The calculating results are in good agreement with that of the experimental results, so the calculating formulas can be used for designing recycled coarse aggregate concrete composite beams.%为了解钢-压型钢板再生混凝土组合梁受弯性能,分别对5个钢-压型钢板再生粗骨料混凝土组合梁和2个钢-压型钢板普通混凝土组合梁进行重复荷载作用下的受弯试验,对比分析其受弯性能,研究抗剪栓钉布置数量与形式、板厚和型钢尺寸对再生粗骨料混凝土组合梁的承载力、挠度、破坏形态的影响.试验结果表明:钢-压型钢板再生粗骨料混凝土组合梁与普通混凝土组合梁的受弯性能相近、破坏形态相似.在试验基础上,参照现行普通混凝土组合结构设计规范,给出钢-再生粗骨料混凝土组合梁的受弯极限承载力和挠度计算方法,计算结果与试验结果比较表明,其计算误差与钢-普通混凝土组合梁相近,可用于钢-再生粗骨料混凝土组合梁设计.
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