摘要
对采用外粘玻璃纤维布加固震损柱的抗弯性能和抗震效果进行了专门研究。共有 11根柱进行了低周反复荷载试验 ,其中 3根在原始状态下进行试验以确定其破坏模式 ,另 8根柱预裂后粘贴玻璃纤维布进行修补加固后进行试验。试验结果表明 ,未加固柱的强度和延性都比较低 ,加固后柱的抗弯能力显著提高 ,变形性能明显改善。在试验研究的基础上 ,作者提出了加固柱抗弯承载力的计算方法 。
The effectiveness of bonding glass-fiber reinforced polymer (GFRP) sheets to retrofit reinforced concrete columns for enhanced flexural strength is described in this paper. Eleven reinforced concrete columns are tested under cyclic lateral load and constant axial load. Three columns are tested in the'as-built' condition to investigate the failure modes of columns under different degrees of axial loading. Eight other columns in pre-damaged condition are tested, after retrofitted with bonding GFRP sheets. The as built columns suffere flexural failure at low strength and displacement ductility,whereas the flexural strength and hysteretic responses of the strengthened columns are improved significantly. Based on the test results,a calculation method is provided, and good agreement with the test results is achieved.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第2期38-45,共8页
China Civil Engineering Journal
基金
教育部高等学校博士学科点专项科研基金资助 (2 0 0 1 0 1 4 1 0 1 7)
中国博士后科研究基金资助 (2 0 0 4 0 350 4 92 )
关键词
钢筋混凝土柱
玻璃纤维聚合物
加固
承载力
延性
reinforced concrete column
glass fiber reinforced polymer
strengthering
bearing capacity
ductility
