自密实混凝土梁抗弯性能试验研究  

EXPERIMENTAL RESEARCH ON THE BENDING RESISTANCE OF THE SELF-COMPACTING CONCRETE BEAM

作　　者：孟志良[1,2] 孙建恒[2] 王国栋[3] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]河北农业大学城乡建设学院,河北保定071001 [3]北方设计研究院,河北石家庄050011

出　　处：《工业建筑》2011年第1期97-100,129,共5页Industrial Construction

基　　金：河北省科技攻关项目资助(06213701D)

摘　　要：通过对6根自密实混凝土梁和2根普通混凝土梁的对比试验,研究自密实混凝土简支梁的抗弯性能。结果表明:1)自密实混凝土梁的极限荷载实测值的平均值与普通混凝土梁实测值相差不多,但高于其理论计算值;双向板极限荷载实测值与同强度等级普通混凝土双向板极限荷载实测值相差不大,且明显高于其理论计算值;2)两种混凝土梁荷载-挠度曲线形状、裂缝发展和破坏形态基本相同;3)自密实混凝土沿梁高的平均应变基本符合平截面假定。因此,采用混凝土理论设计自密实混凝土梁是合理的和安全的。Six self-compacting concrete beams and two corresponding ordinary concrete beams of two different strength grades were used to study anti-bending properties of concrete freely supported beams.The results show： 1）the mean of the experimental data of ultimate load of self-compacting concrete beams is close to that of corresponding ordinary concrete beams,and is higher than its theoretical value;2） the loading-deflection curves,the crack development and the failure mode of the two kinds of beams are basically the same;3） the average strain along section height of self-compacting concrete beams can fit with the assumption of plane section basically.Therefore,it is reasonable and safe to design the self-compacting concrete beams according to the theory of ordinary concrete.

关 键 词：自密实混凝土 极限荷载 荷载-挠度曲线 破坏形态 

分 类 号：TU375.1[建筑科学—结构工程]