再生混凝土无腹筋梁抗剪性能试验研究  

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

作　　者：张雷顺[1] 张晓磊[2] 闫国新[2] 

机构地区：[1]郑州大学环境与水利学院,郑州450002 [2]黄河水利职业技术学院,开封475003

出　　处：《工业建筑》2007年第9期57-61,共5页Industrial Construction

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。Using the contrast tests of 13 recycled aggregate concrete beams and natural aggregate concrete beams, the effects of replacement ratio of recycled coarse aggregate and shear-span ratio on the characters of shear capacity and deformability of recycled concrete beams are investigated. The test result shows the deflection and diagonal crack of recycled aggregate concrete beams are bigger than natural aggregate concrete beams, the shear capacity of recycled concrete beams 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 beams is recommended.

关 键 词：再生混凝土 梁 斜截面 受剪承载力 

分 类 号：TU375.1[建筑科学—结构工程]