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（上海市建筑科學(xué)研究院上海市工程結(jié)構(gòu)安全重點(diǎn)實(shí)驗(yàn)室， 上海 200032）

［摘要］大斷裂應(yīng)變纖維布（LRS FRP）是一種低彈模新型綠色纖維材料，應(yīng)用于結(jié)構(gòu)加固,可顯著提高延性。為研究LRS FRP環(huán)向圍束法加固混凝土柱中的加固效果，設(shè)計(jì)了2根未加固的對(duì)比混凝土柱和3根LRS FRP加固混凝土柱并開(kāi)展了軸壓試驗(yàn)研究。結(jié)果表明：LRS FRP環(huán)向圍束法加固混凝土柱可顯著提高其變形能力和延性，提出的LRS FRP加固混凝土柱受壓承載力計(jì)算方法與試驗(yàn)結(jié)果吻合較好。

［關(guān)鍵詞］混凝土柱； 加固； 環(huán)向圍束法； 大斷裂應(yīng)變纖維布； 軸壓

中圖分類號(hào)：TU366-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)04-0078-05

Experimental research on axial compression performance of RC columns strengthened by LRS FRP

Li Xiangmin, Chen Xi, Xu Qingfeng, Wang Zhuolin

(Shanghai Key Laboratory of Engineering Structure Safety, Shanghai Research Institute of Building Sciences, Shanghai 200032, China)

Abstract:Large rupture strain FRP (LRS FRP) is a new green fiber material with low elastic modulus, and it can provide high ductility when applied in strengthening. In order to investigate the strengthening effect of LRS FRP on RC columns using circumferential bundle method, two unstrengthened comparison columns and three columns strengthened with LRS FRP were designed to be tested under uniaxial loading. Experimental results indicate that RC columns strengthened with LRS FRP using circumferential bundle method increase deformability and ductility. The results proposed by calculation method of the compression bearing capacity of the strengthened LRS FRP columns are in good agreement with the experimental results.

Keywords:RC column; strengthening; circumferential bundle method; large rupture strain FRP; axial compression

*上海市優(yōu)秀技術(shù)帶頭人計(jì)劃（16XD1422400），上海市青年科技啟明星項(xiàng)目（15QB1403200）。

作者簡(jiǎn)介：李向民，博士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: 13601902634@163.com。