再生混凝土无腹筋梁斜截面受力性能试验研究  

Experimental Research on the Shearing Capacity of Recycled Concrete Beams Without Stirrups

作　　者：张雷顺[1] 张晓磊[1] 闫国新[1] 

机构地区：[1]郑州大学环境与水利学院,河南郑州450002

出　　处：《郑州大学学报（工学版）》2006年第2期18-23,共6页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(59778045)

摘　　要：通过13根再生混凝土梁和普通混凝土梁的对比试验,探讨了再生骨料取代率、剪跨比等因素对再生混凝土梁斜截面受力性能的影响.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大;再生混凝土梁的破坏形式与剪跨性有关,λ≤1发生斜压破坏,1.5≤λ<3发生剪压破坏;λ≥3.0发生斜拉破坏.再生混凝土梁随着再生骨料取代率的增加,抗剪承载力有下降的趋势;随着剪跨比的增加,抗剪承载力减小.在试验研究的基础上,根据极限平衡理论,提出了再生混凝土梁受剪承载力计算公式.In this paper, with the contrast tests of 13 recycled aggregate concrete and natural aggregate concrete, the effects of replacement ratio of recycled aggregate and shear - span ratio on the characters of shear capacity and deformability are investigated. The test result shows the deflection and diagonal crack of recycled aggregate concrete are bigger than natural aggregate concrete, the shear capacity of recycled concrete beam reduces with the increase of recycled coarse aggregate content, the shear capacity reduces with the increase of shear- span ratio. Based on the result of failure by shear of recycled concrete beams and using the ultimate equilibrium theory, a formula for the shear strength of recycled concrete is recommended.

关 键 词：再生混凝土 粱 无腹筋梁 受剪承栽力 

分 类 号：TU528[建筑科学—建筑技术科学]