再生混凝土梁抗剪性能试验研究

通过对相同混凝土抗压强度、不同再生粗骨料取代率的再生混凝土简支梁的抗剪试验，研究了再生混凝土梁斜截面的受力与变形性能。试验结果表明：相同混凝土抗压强度的再生混凝土梁与普通混凝土梁的变形和斜裂缝开展情况基本相似，但抗剪极限承载能力存在差异；随着再生粗骨料取代率的增加，再生混凝土梁的抗剪承载能力有下降的趋势。最后，本文在对再生混凝土梁抗剪机理进行初步分析的基础上，提出了再生混凝土梁的抗剪承载力建议公式。

Experimental Sstudy on Shear Behavior of Recycled Concrete Beams

This paper mainly discusses the shear behavior of simply - supported beam using recycled concrete with same axial compressive strength but different replacement ratio of recycled coarse aggregate, and the characters of both shear capacity and diagonal cracking are analyzed. The test result shows that the shear capacity of recycled concrete beam reduces with the increase of recycled coarse aggregate content, whereas, the deflection and diagonal crack width is similar to the natural aggregate concrete beam. Finally, a formula related to the shear capacity of recycled concrete beams is proposed and recommended.