摘要
为了研究碳纤维增强复合材料(CFRP)加固高强混凝土方柱的抗震性能,对13个高强混凝土方柱进行低周反复荷载试验,研究了试件破坏形态、滞回特性、骨架曲线、耗能能力和延性等抗震性能,探讨了轴压比、剪跨比、CFRP加固量对高强混凝土方柱延性性能的影响,给出了计算CFRP布有效约束系数和位移延性系数的公式。结果表明:随着轴压比增大、剪跨比减小,试件耗能能力和延性降低;横向包裹CFRP布可以显著改善高强混凝土方柱耗能能力和延性;与未加固试件相比,横向包裹CFRP布对轴压比较大或剪跨比较小试件的延性提高效果更为显著;随着加固量的增加,试件的耗能能力和延性增大,但增加幅度逐渐降低。
To investigate the seismic behaviors of high-strength reinforced concrete of thirteen high-strength such as failure patterns, th carbon fiber reinforced polymer （CFRP）, the low cyclic RC square columns was conducted. The seismic behaviors hysteresis behaviors, skeleton curves, energy dissipation （RC） square loading test of columns, capacity and ductility were studied, and the influences of axial load ratio, shear span ratio and CFRP strengthening volume on the ductility of high-strength RC square columns were discussed. The reduced as observably the increase improve the of axial load ductility and ratios or the decrease of shear span ratios; energy dissipation capacity of strength columns; compared with the columns without CFRP, the seismic behaviors of axial load ratio or low shear span ratio are improved more obviously after being col strengt CFRP in transverseg and the ductility, energy dissipation capacity increase with the i strengthening volume, but the improvement extent reduces gradually. CFRP can RC square with high hened with ncreases of
出处
《建筑科学与工程学报》
CAS
北大核心
2012年第2期21-29,共9页
Journal of Architecture and Civil Engineering
基金
国家自然科学基金项目(50878035)
关键词
CFRP
高强混凝土方柱
加固
延性
低周反复荷载
抗震性能
CFRP
high-strength reinforced concrete square column
strengthening
ductilitylow cyclic loading
seismic behavior
