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.
出处
《桂林理工大学学报》
CAS
北大核心
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)
