乌鲁木齐地区C30自密实混凝土简支梁受弯性能试验研究  

Experimental research on flexural performance of C30 self-compacting concrete simply supported beam in Urumqi

作　　者：陈波[1] 刘清[1] 何原野[1] 

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830047

出　　处：《混凝土》2014年第11期148-152,156,共6页Concrete

基　　金：新疆研究生科研创新项目(XJGRI2013045);国家自然科学基金项目(51368057)

摘　　要：为研究乌鲁木齐地区C30自密实混凝土简支梁受弯性能,以配筋率为变量,采用乌鲁木齐地区常用原材料分别制作5根C30自密实混凝土简支梁和3根C30普通混凝土简支梁,对其进行受弯性能测试。验证构件的平截面假定,对其荷载—挠度曲线、开裂弯矩、极限压应变、刚度和正截面承载力进行了对比分析。试验结果表明:自密实混凝土梁和普通混凝土梁均满足平截面假定;自密实混凝土和普通混凝土的计算开裂荷载均大于试验开裂荷载;随着荷载的增大,受弯混凝土构件抗弯刚度逐渐减小,其刚度前期衰减较快,后期衰减较慢;自密实混凝土和普通混凝土的极限荷载计算值低于极限荷载试验值。To study the flexural performance of C30 self-compacting concrete simply supported beam in Urumqi area, the ratio of rein- forcement as variables,respectively,making 5 C30 self compacting concrete beams and 3 C30 ordinary concrete beams in Urumqi area were used raw materials, testing the flexural performance.Verify the flat section assumption,the load deflection curve,cracking moment,ulti- mate compressive strain, stiffness and normal section bearing capacity were analyzed.The test results showed that self-compacting concrete and ordinary concrete beams were all meet the plane section assumption; calculation cracking load of self compacting concrete and ordinary concrete were greater than that of test cracking load;as the load increases, the flexural stiffness of the concrete members decreased,the early stage of the stiffness attenuate fast,the later stage of the stiffness attenuate slowly;calculated value of the ultimate load was less than test value.

关 键 词：自密实混凝土 简支梁 受弯性能 

分 类 号：TU528.53[建筑科学—建筑技术科学]