钢筋钢纤维全轻混凝土叠浇梁裂缝宽度试验研究  

Experimental study on crack width of reinforced SFRFLC superposed beams

作　　者：李长永[1] 李牧青[1] 赵兵[1] 赵顺波[1] 

机构地区：[1]华北水利水电大学土木与交通学院,河南郑州450011

出　　处：《河北工业大学学报》2014年第6期97-100,共4页Journal of Hebei University of Technology

基　　金：河南省教育厅科学技术研究重点项目(12A560008);河南省高校生态建筑材料与结构工程科技创新团队(13IRTSHN002);河南省新型城镇建筑技术协同创新中心(教科技[2013]638号)

摘　　要：通过14根钢筋钢纤维全轻混凝土叠浇梁及用于对比的4根钢筋混凝土梁和钢筋钢纤维全轻混凝土梁的试验,研究了钢纤维体积率和钢纤维全轻混凝土截面高度对钢纤维全轻混凝土叠浇梁正截面裂缝分布的影响规律,确定了考虑钢纤维全轻混凝土受力特性的叠浇梁截面有效受拉区高度和纵向受拉钢筋计算方法,提出了叠浇梁正截面平均裂缝间距、平均裂缝宽度和最大裂缝宽度的计算公式.By the tests of 14 reinforced SFRFLC superposed beams comparing with 4 reinforced concrete beams and SFRFLC beams, this paper studies the effects of the fraction of steel fiber by volume and the sectional depth of SFRFLC on the normal sectional crack distribution of these beams. The methods are determined for calculation of the height of effective tensile area and the stress of longitudinal tensile steel bar considering the loading performance of SFRFLC. The formulas are proposed for calculating the average crack space, the average crack width and the maximum crack width of reinforced SFRFLC superposed beams.

关 键 词：叠浇梁 钢纤维全轻混凝土 截面高度 钢纤维体积率 裂缝宽度 

分 类 号：TU528[建筑科学—建筑技术科学] TV332[水利工程—水工结构工程]