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（1 陜西鐵路工程職業(yè)技術(shù)學(xué)院， 渭南 714000； 2 西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）

［摘要］為研究防屈曲支撐對(duì)震后受損框架的加固效果，設(shè)計(jì)并制作了一榀鋼筋混凝土框架（RCF）和一榀震損后經(jīng)防屈曲支撐加固的框架（BRCF），分別進(jìn)行擬靜力加載，觀察試驗(yàn)現(xiàn)象及破壞模式，對(duì)比分析兩試件的承載力及其退化、剛度、延性、耗能性能等指標(biāo)。試驗(yàn)結(jié)果表明：震后受損框架經(jīng)防屈曲支撐加固后，極限承載力漲幅為146.7%，初始剛度提高了150%，總耗能量達(dá)到了對(duì)比試件的4.6倍，并能滿(mǎn)足地震下結(jié)構(gòu)大變形的要求，具備良好的抗倒塌能力。

［關(guān)鍵詞］防屈曲支撐； 鋼筋混凝土框架； 擬靜力加載； 震后受損框架； 抗震性能； 加固效果

中圖分類(lèi)號(hào)：TU378-4文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)02-0113-06

Experimental study on seismic performance of earthquake-damaged frame strengthened by buckling-restrained bracee

WANG Ting1, YANG Yong2, ZHANG Lei1

（1 Shaanxi Railway Institute, Weinan 714000， China；2 School of Civil Engineering, Xi′an University of Architecture & Technology, Xi′an 710055， China)

Abstract:In order to study the reinforcement effect of buckling-restrained brace on the post-earthquake damaged frame, two reinforced concrete frame specimens, one undamaged and the other strengthened by buckling-restrained brace(BRB) after earthquake damaged were designed and fabricated, and which were tested under pseudo static loading. Specimens′ yield mechanism, failure mode were observed, parameters including load carrying capacity and degradation, stiffness, ductility and energy-dissipation capacity, were compared and analyzed. The results showed that, after strengthened by BRB, earthquake damaged frame′s ultimate bearing capacity increased by 146.7%, the initial stiffness improved by 150%, the total energy consumption improved to 4.6 times of the comparison specimen. After strengthened by BRB, earthquake-damaged frame structure can meet the requirement of large deformation under earthquake and has good anti-collapse ability. 

Keywords:buckling-restrained brace； reinforced concrete frame； pseudo static loading； earthquake-damaged frame； seismic performance； reinforcement effect

*陜西鐵路工程職業(yè)技術(shù)學(xué)院科研基金項(xiàng)目——BRB加固震后框架梁柱節(jié)點(diǎn)抗剪設(shè)計(jì)（KY2016-46）。

作者簡(jiǎn)介：王婷，碩士,講師，Email：wangting19900609@163.com。