腹部开设圆孔的钢筋混凝土梁的试验研究(Ⅳ)  

An Experimental Study on Reinforced Concrete Beams with Circular Opening (Ⅳ)

作　　者：杨玉华[1] 蔡健[1] 张学文[1] 张剑麟 

机构地区：[1]华南理工大学土木工程系,广东广州510640 [2]广东省移动通信总公司,广东广州510100

出　　处：《华南理工大学学报（自然科学版）》2001年第2期83-86,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目! (95 0 119);广东省高校"千百十工程"优秀人才培养基金资助项目! (粤高教科 [1997]5号 )

摘　　要：通过试验研究了腹部分别开设较小单孔以及双孔的钢筋混凝土梁的破坏特点、钢筋的应变特点、挠度、裂缝宽度及承载力等力学特性 .结果表明 ,孔洞尺寸对开孔梁的力学性能影响明显 ,腹部开设双孔 (孔间净距大于孔径 )时 ,对梁的力学性能无明显影响 .This paper, based on the experiment, investigates the mechanical behavior of the reinforced concrete beams with the smaller sizes of circular opening and double circular openings. The experimental results are discussed in terms of the crack propagation and failure process, the strains of the reinforcements, the deflection, and the characteristics capacity_bearing shear. The results show that the behavior of the beams is also affected by the size of the opening and yet it is not markedly affected by the double circular openings, which have a distance of more than 1 time of the diameter of opening from its side to the side of the circular openings. The paper provides some references for engineering practice.

关 键 词：钢筋混凝土 梁 圆孔 试验 承载力 破坏特点 应变特点 挠度 裂缝宽度 单孔 双孔 

分 类 号：TU375.103[建筑科学—结构工程]