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（1 寧波大學(xué)建筑工程與環(huán)境學(xué)院， 寧波 315211； 2 中國(guó)建筑科學(xué)研究院， 北京 100013）

［摘要］通過(guò)1個(gè)火災(zāi)后碳纖維加固型鋼混凝土梁柱節(jié)點(diǎn)試件和1個(gè)碳纖維加固常溫下未受火型鋼混凝土梁柱節(jié)點(diǎn)試件的低周反復(fù)加載試驗(yàn)及2個(gè)常溫下及火災(zāi)后未加固節(jié)點(diǎn)的對(duì)比試驗(yàn)，研究碳纖維加固對(duì)常溫下及火災(zāi)后型鋼混凝土梁柱節(jié)點(diǎn)抗震性能修復(fù)的有效性。結(jié)果表明：火災(zāi)后型鋼混凝土梁柱節(jié)點(diǎn)的承載力和剛度降低、延性系數(shù)減小。所采用的碳纖維加固方法能有效提高常溫下及火災(zāi)后型鋼混凝土梁柱節(jié)點(diǎn)的承載力與延性，加固后試件的滯回曲線更加飽滿，變形能力增強(qiáng)，極限荷載后的強(qiáng)度和剛度退化減緩，抗震性能的修復(fù)效果顯著。

［關(guān)鍵詞］型鋼混凝土； 梁柱節(jié)點(diǎn)； 火災(zāi)后； 碳纖維； 加固

中圖分類(lèi)號(hào)：TU398文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)09-0033-07

Experimental study on performance of SRC beam-column joints strengthened by CFRP under normal temperature and after exposure to fire

Qiu Zhejun1， Li Junhua1， Chi Yuyu1， Sun Bin2

(1 College of Civil Engineering and Environment, Ningbo University, Ningbo 315211, China; 

2 China Academy of Building Research, Beijing 100013, China)

Abstract:One steel reinforced concrete (SRC) beam-column joints after exposure to fire, together with another SRC beam-column joint under normal temperature strengthened by CFRP, and the other two comparative specimens without strengthened were tested under cyclic reversed loading to research the strengthening effectiveness by CFRP on seismic performance of SRC beam-column joints under normal temperature and after exposure to fire. Test results show that the load bearing capacity and rigidity, as well as ductility coefficient of SRC beam-column joints are all declined sharply after exposure to fire. The proposed strengthening method can enhance the load bearing capacity and ductile performance of SRC beam-column joints under normal temperature and after exposure to fire remarkably. Specimens strengthened by CFRP according to the proposed method have plumper hysteresis loops, stronger deformation ability, more slowly degeneration speed on strength and rigidity, and significant repair effect of seismic performance.

Keywords:steel reinforced concrete; beam-column joint; after exposure to fire; CFRP; strengthening

*國(guó)家自然科學(xué)基金項(xiàng)目（51178226），浙江省自然科學(xué)基金項(xiàng)目（LY14E080003）。

作者簡(jiǎn)介：裘哲俊，碩士研究生，Email:875553473@qq.com。