摘要
为了探寻加固震损RC柱的有效方法,对3根用CFRP加固震损RC柱和1根对比柱进行了在低周水平反复荷载作用下的抗震性能试验研究.研究的主要参数为轴压比和预裂裂缝宽度,试验结果表明:(1)当轴压比相同时,震损较严重的柱经加固,可以与震损较轻的柱具有基本相同的承载力;当预裂裂缝宽度相同时,轴压比越大,碳纤维布加固震损RC柱极限承载力提高幅度更显著.(2)小轴压比加固柱位移延性系数提高更加明显.轴压比增大一倍(裂缝宽度相同),加固试件2与试件4相比,位移延性系数降低了27.7%;裂缝宽度增大一倍(轴压比相同),加固试件4与试件3相比,位移延性系数提高了22.8%.
In order to explore an effective strengthening method for the damaged reinforced concrete R/C columns, seismic experimental studies are conducted by using a constant gravity load and alternately repeated lateral forces with one short column specimen and three CFRP strengthened columns. The parameters of the test specimens included the axial compression ratio and the crack width. The results indicate that ：（ 1 ）At the same axial compression ratio, the severely damaged column after being strengthened could present the same bearing capacity as the less damaged column;in the same crack width, the ultimate bearing capacity of the strengthened damaged column with higher axial compression ratio increased obviously. （2）The deformation ductility coefficient of the strengthened column with smaller axial compression ratio increased obviously. When increasing the axial compression ratio （under the same crack width）, the deformation ductility coefficient of the strengthened specimen No. 2 reduced 27.7% in comparison with specimen No. 4. When the crack width increases （under the same axial compression ratio）, the deformation ductility coefficient of the strengthened specimen 4 is increased by 22.8% in comparison with specimen No. 3.
出处
《内蒙古科技大学学报》
CAS
2013年第1期93-98,共6页
Journal of Inner Mongolia University of Science and Technology
