摘要
针对柱身已开裂、柱底固定端已形成塑性铰的严重损伤的4个钢筋混凝土柱,提出采用沿柱高粘贴CFRP布箍和底部固定端反贴角钢的共同加固新方法,可以达到既加固钢筋混凝土柱身,又使柱底重新成为固定端的目的。然后,对已进行加固的4根柱进行模拟地震作用的水平低周反复荷载试验,研究不同肢长和肢厚的角钢对加固试件抗震性能的影响。基于试验结果,分析了各试件的裂缝发展和抗震能力;绘出了试件的滞回曲线和骨架曲线。结果表明,CFRP布和角钢共同加固的损伤钢筋混凝土柱,其抗震能力随着角钢肢长的增加而增大;角钢厚度的变化对其承载力提高无影响;共同加固后的柱具有良好的抗震性能。
The new method that composited strengthened by CFRP hoops along the columns and angle steels at the end of the columns was advanced for serious injury 4 R.C columns with crack and plastic hinges at the end.Then,the experiments were done under low-cyclic and repeated load for the strengthened columns.The seismic performances of the strengthened columns about different limb length and limb thick of angles steel were studied.Based on test results,the cracks development and the anti-seismic capacity of the specimens were analyzed,and the skeleton curve and hysteresis curve of the sample were drawn out.The results show that the injury RC columns are composited strengthened by CFRP hoops and angle steels with a better capacity.The longer angle steel’s limb is,the higher the capacity of the composited strengthened columns is.But it didn’t influence for the limb’s thickness.The columns composited strengthened possess a good seismic performance.
出处
《建筑结构》
CSCD
北大核心
2010年第S2期376-378,322,共4页
Building Structure
基金
河南省重点科技攻关项目(092102310036)
