再生混凝土无腹筋梁抗剪性能试验研究

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基金项目:

国家自然科学基金资助项目(59778045)

EXPERIMENTAL RESEARCH ON THE SHEARING CAPACITY OF RECYCLED CONCRETE BEAMS WITHOUT STIRRUPS

1.
1. College of Environmental and Water Conservancy Engineering,Zhengzhou University Zhengzhou 450002;
2.
2. Yellow River Conservancy Technical College Kaifeng 475003

摘要: 通过13根再生混凝土梁与普通混凝土梁的对比试验,对再生粗骨料取代率、剪跨比等因素对再生混凝土梁斜截面受力和变形性能的影响进行探讨。试验结果表明:再生混凝土梁比普通混凝土梁变形和斜裂缝宽度稍大;随着再生粗骨料取代率的增加,再生混凝土梁的抗剪承载力略有下降的趋势;随着剪跨比的增加,抗剪承载力减小。根据13根再生混凝土梁的剪切破坏结果,依据极限平衡理论,提出再生混凝土梁受剪承载力的计算公式。
- 再生混凝土 /
- 梁 /
- 斜截面 /
- 受剪承载力
Abstract: Using the contrast tests of 13 recycled aggregate concrete beams and natural aggregate concrete beams, theeffects of replacement ratio of recycled coarse aggregate and shear -span ratio on the characters of shear capacity anddeformability of recycled concrete beams are investigated. The test result shows the deflection and diagonal crack of recycledaggregate concrete beams are bigger than natural aggregate concrete beams, the shear capacity of recycled concrete beamsreduceswith the increase of recycled coarse aggregate content, the shear capacity reduces with the increase of shear -spanratio. Based onthe result offailure by shear of recycled concrete beams andusing the ultimate equilibrium theory, a formulafor the shear strength of recycled concrete beams is recommended.
- recycled concrete /
- beam /
- oblique section /
- shear capacity