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(1 長安大學(xué)建工學(xué)院 西安 710061； 2 上海市建筑科學(xué)研究院有限公司博士后工作站 200032)
【提要】 通過7個(gè)足尺混凝土梁柱節(jié)點(diǎn)的低周反復(fù)加載試驗(yàn)，對(duì)應(yīng)用碳纖維布的兩種空間框架節(jié)點(diǎn)加固方法及一種平面框架節(jié)點(diǎn)加固方法進(jìn)行了分析研究。試驗(yàn)結(jié)果表明，所采用的不同加固方法均能夠有效地增強(qiáng)節(jié)點(diǎn)核心區(qū)的抗剪性能，改變節(jié)點(diǎn)的剪切破壞模式，提高節(jié)點(diǎn)的承載力與延性，使得加固節(jié)點(diǎn)的強(qiáng)度退化和剛度退化得以滯后，耗能能力得到大幅度提高，從而有效改善了梁柱節(jié)點(diǎn)組合體的抗震性能。
【關(guān)鍵詞】 碳纖維布 加固 梁柱節(jié)點(diǎn)
Experimental Study on Seismic Behavior of RC Beamcolumn Joints Upgraded by CFR
P Sheets/Wang Bu1，2,Wang Pu2 (1 College of Civil Engineering,Ch
angan University,Xian 710061,China; 2 Postdoctoral Workstation of Shanghai R
esearch Institute of Building Science，Shanghai 200032,China)
Abstract:To verify two seismic retrofit methods for joints in twoway frames and another
 seismic retrofit method for joints in oneway frames using CFRP sheets,seven f
ull scale interior RC beamcolumn joints were tested under quasistati
c cycle load. The test results showed that the seismic behaviors of strengthened
 joints were improved effectively by the schemes,which were successful in enhan
cing the shear capacity of joint core,changing the shear mode of failure,incre
asing the loadcarrying capacity and ductility,delaying the strength degradatio
n and stiffness degradation,upgraded the energy dissipation capacity.
Keywords:CFRP sheets;strengthening;beamcolumn joints

*上海市建設(shè)技術(shù)發(fā)展基金會(huì)科研項(xiàng)目(A0105150)。