CFRP加固一端固定一端铰支柱临界力分析计算
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摘要
利用能量法推求了一端固定一端铰支柱两端用碳纤维加固后的的临界力,结果表明用碳纤维加固后构件的临界力有所提高。随着长细比的减小,临界力的提高比例大致成正比例减小,说明长细比较大的构件比长细比较小的构件稳定性增强效果明显;相同长细比,下端加固碳纤维布比上端加固碳纤维布的临界力的提高比例大约高5倍,说明下端加固效果较上端加固效果好。
The crippling force for the column reinforced with CFRP(carbon fiber reinforced polymer) was computed with energy method.Result show that Euler force exhibits increase after retrofitting.With the decrease of the slenderness ratio,the increasing proportion of the crippling force is roughly proportional to decrease.It is suggested that the large slenderness ratio of the member is more obvious than the small slenderness ratio of the member on the aspect of stability enhancement effect.Under the condition of same slenderness ratio,the lower end of the member reinforced with CFRP is 5 times bigger than the upper end of the member reinforced with CFRP about the increasing proportion of the crippling force.It is suggested that the lower end of the member reinforced with CFRP is more better than the upper lower end of the member reinforced with CFRP on the aspect of stability enhancement effect.
The crippling force for the column reinforced with CFRP(carbon fiber reinforced polymer) was computed with energy method.Result show that Euler force exhibits increase after retrofitting.With the decrease of the slenderness ratio,the increasing proportion of the crippling force is roughly proportional to decrease.It is suggested that the large slenderness ratio of the member is more obvious than the small slenderness ratio of the member on the aspect of stability enhancement effect.Under the condition of same slenderness ratio,the lower end of the member reinforced with CFRP is 5 times bigger than the upper end of the member reinforced with CFRP about the increasing proportion of the crippling force.It is suggested that the lower end of the member reinforced with CFRP is more better than the upper lower end of the member reinforced with CFRP on the aspect of stability enhancement effect.
引文
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[3]陆洲导,宋彦涛,王李果.碳纤维加固混凝土框架节点的抗震试验研究[J].结构工程师,2004,20(5):39-43.
[4]余琼.框架节点加固方法探讨[J].结构工程师,2004,1(1):62-70.
[5]黄小奎,崔凯成,熊丹安.碳纤维布加固梁柱节点试验研究[J].武汉理工大学学报,2004,26(2):30-33.
[6]王步,王溥,夏春红.核芯区外碳纤维布增强混凝土框架节点抗剪性能试验研究与机理分析[J].工业建筑,2005,35(7):29-33.
[7]吴波,王维俊.碳纤维布加固钢筋混凝土框架节点的抗震性能试验研究[J].土木工程学报,2005,38(4):60-65.
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