HRB500级纵筋钢纤维RPC梁受剪抗裂性能试验  

Experiment on shear crack resistance property of HRB500 reinforced steel fiber RPC beam

作　　者：金凌志[1,2] 温晴[1,2] 杨蕊[3] 李文兴[1,2] 

机构地区：[1]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004 [3]浙江长征职业技术学院,杭州310023

出　　处：《桂林理工大学学报》2016年第3期488-492,共5页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51368013);广西矿冶与环境科学实验中心项目(KH2013ZD008)

摘　　要：为了研究HRB500级纵筋钢纤维活性粉末混凝土梁的受剪抗裂性能,对4根不同钢纤维体积率的RPC简支梁进行试验研究,并将试验数据与断裂力学裂纹张开位移(COD)公式计算结果进行比对分析。研究结果表明:钢纤维能够较好地阻碍无腹筋RPC梁受剪斜裂缝的开展,其开裂荷载和极限荷载随钢纤维掺量增加而提高;最大斜裂缝宽度随钢纤维掺量的增加而减小,但钢纤维掺量超过2%以后这种影响不再明显;运用裂纹张开位移公式计算HRB500级纵筋钢纤维RPC梁的受剪初始裂纹具有较好的可信度。In order to study the shear crack resistance property of HRB500 reinforcement steel fiber RPC beams,the experimental research on RPC simple surpported beams with 4 different steel fiber volume ratios was carried out,and then the experimental data were analyzed and compared with the results calculated by the principle of fracture mechanics crack opening displacement( COD). Research and analysis show that steel fiber can effectively hinder the development of shear diagonal cracks in the RPC beams. The cracking load and ultimate load increase with the increase of fiber content,and the width of the maximum oblique crack decreases with the increase of fiber content. But the effect is not obvious after the steel fiber content is more than 2%. The formula based on( COD)principle has good reliability in calculating the shear initial crack of the reinforced steel fiber RPC beams.

关 键 词：HRB500级钢筋 RPC梁 钢纤维掺量 裂纹张开位移原理 抗裂性能 斜裂缝宽度 

分 类 号：TU528.572[建筑科学—建筑技术科学]