摘要
开展18根CFRP条带加固RC梁的抗剪试验,分析剪跨比、CFRP条带间距和预裂度等对加固RC梁斜裂缝投影长度的影响。试验研究表明:CFRP条带间距的减小将延缓斜裂缝的发展,增加斜裂缝数量;随着预裂度的增大,斜裂缝发展加快,斜裂缝数量及投影长度增大;剪跨比是影响斜裂缝发展和投影长度的主要因素,斜裂缝投影长度随着剪跨比的增大而增大。在试验研究基础上,综合考虑剪跨比、CFRP条带间距和预裂度等因素影响,提出CFRP加固混凝土梁斜裂缝水平投影长度的计算公式。
The shear tests of 18 RC beams reinforced with CFRP strips are carried out,and the impact of shear span ratio,spacing of CFRP strips and pre-cracked degree on the projection length of diagonal cracks of CFRP reinforced RC beams is investigated.The experimental results show that with the decrease of the spacing of CFRP strips,the development rate of the diagonal cracks decreases gradually,while the number of diagonal cracks increases.As the pre-cracked degree increases,the development rate of diagonal cracks increases,the number and projection length of diagonal cracks increase.Shear span ratio is the main parameters affecting the development of diagonal cracks and the length of projection.As shear span ratio increases,the projection length of diagonal cracks increases gradually.On the basis of experimental research,considering the influence of shear span ratio,spacing of CFRP strips and pre-cracked degree,a formula for calculating horizontal projection length of diagonal cracks of the CFRP reinforced RC beams is put forward.
作者
郭卫东
于峰
谈嗣勇
方圆
秦尹
王宗森
郭生全
GUO Weidong;YU Feng;TAN Siyong;FANG Yuan;QIN Yin;WANG Zongsen;GUO Shengquan(Anhui Masteel Jiahua New Building Materials Co,Ltd,Ma'anshan 243000,China;College of Civil Engineering,Anhui University of Technology,Ma'anshan 243032,China)
出处
《复合材料科学与工程》
CAS
北大核心
2023年第4期51-55,99,共6页
Composites Science and Engineering
基金
国家自然科学基金项目(52078001)
安徽省杰出青年基金项目(2008085J29)
安徽省高校自然科学研究重点项目(KJ2020A0234,YJS20210351)
安徽工业大学芜湖技术创新研究院应用基础研究项目(2022jc04)。
作者简介
郭卫东(1968-),男,硕士研究生,高级工程师,主要从事新型建筑材料方面的研究;通讯作者:于峰(1980-),男,博士,教授,主要从事固废资源化利用方面的研究,yufeng2007@126.com。
