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（中國(guó)建筑科學(xué)研究院工程抗震研究所，北京 100013）

［摘要］屈曲約束支撐由于具有受壓不會(huì)屈曲失穩(wěn)的性質(zhì)，與含有普通支撐的框架相比，含有屈曲約束支撐的框架具有更好的耗能作用。然而常規(guī)屈曲約束支撐的芯材和無(wú)粘結(jié)材料往往采用特殊材料制成，加工制作成本較高，不利于工程推廣使用。為了避免常規(guī)屈曲約束支撐存在的上述缺陷，自主研制開(kāi)發(fā)了一種帶有縫隙和防滑凸起的新型屈曲約束支撐。著重介紹了這種新型屈曲約束支撐的構(gòu)造和特點(diǎn)，并對(duì)6個(gè)支撐試件進(jìn)行了包括標(biāo)準(zhǔn)加載和循環(huán)加載在內(nèi)的低周反復(fù)加載試驗(yàn)。結(jié)合試驗(yàn)現(xiàn)象，分析、探討了支撐的破壞機(jī)理。對(duì)這種屈曲約束支撐的彈性剛度、塑性剛度、屈服荷載和屈服位移等力學(xué)指標(biāo)進(jìn)行了測(cè)定，并將測(cè)定結(jié)果與基于雙線(xiàn)性模型計(jì)算出的理論值進(jìn)行了比較；同時(shí)參照我國(guó)規(guī)范和FEMA356，探討了這種屈曲約束支撐的耗能能力。試驗(yàn)結(jié)果表明，這種新型屈曲約束支撐各項(xiàng)力學(xué)指標(biāo)實(shí)測(cè)值與理論值符合較好，耗能能力穩(wěn)定，滿(mǎn)足國(guó)內(nèi)外規(guī)范的要求，達(dá)到了工程應(yīng)用的標(biāo)準(zhǔn)。

［關(guān)鍵詞］屈曲約束支撐；低周反復(fù)試驗(yàn)；滯回性能

Invention and experimental study on a new type of buckling-restrained brace

Luo Kaihai，Kong Xiangxiong，Cheng Shaoge（Institute of Earthquake Engineering, China Academy of Building Research, Beijing 100013, China）

Abstract:Because the buckling-restrained braces (BRB) will not buckle under compression other than yield, the buckling-restrained braced frame (BRBF) has better energy dissipation characteristics than the conventional braced frame (CBF). The steel core and unbonded agent material of the existing BRB are usually made of special material. It makes the promotion of the BRB become hard. In order to avoid the disadvantages of the existing BRB, a new type of BRB with gap and protuberance was invented. The components and features of the new type of BRB were emphatically introduced. The low-reversed cyclic loading test of six BRB including standard loading and low-cycle fatigue loading were carried out. Based on the phenomenon of BRB during the test,the damage mechanism of BRB was analyzed and discussed. The comparison of measured and theoretical mechanics characteristics of BRB, including elastic stiffness, plastic stiffness, yield force and yield displacement was done. And analysis of energy dissipation indexes of BRB based on the Chinese codes and FEMA356 was also done. The test results indicate that the measured mechanics characteristics of BRB agree well with theoretical results and the energy dissipation behavior of BRB is stable. This new type of BRB can meet the requests of existing codes and reach the standard of application.

Keywords:buckling-restrained brace (BRB)；low-reversed cyclic loading test；hysteretic behavior

“十一五”國(guó)家科技支撐計(jì)劃重點(diǎn)項(xiàng)目(2006BAJ13B01)。

作者簡(jiǎn)介：羅開(kāi)海，博士，副研究員，Email:kailuo@263.net。

參考文獻(xiàn)

［1］ 汪家銘，中島正愛(ài)，陸燁. 屈曲約束支撐體系的應(yīng)用與研究進(jìn)展(Ⅰ)［J］. 建筑鋼結(jié)構(gòu)進(jìn)展，2005，7(1)：1-12.

［2］ 汪家銘，中島正愛(ài). 屈曲約束支撐體系的應(yīng)用與研究進(jìn)展(Ⅱ) ［J］. 建筑鋼結(jié)構(gòu)進(jìn)展,2005，7 (2) :1-11.

［3］ 蔡克銓?zhuān)?lài)俊維. 鋼骨消能支構(gòu)架之耐震研究［J］.結(jié)構(gòu)工程，2002，17(2)：3-32.

［4］ 蔡克銓?zhuān)S智，翁崇興. 含挫屈束制消能支構(gòu)架耐震性能試驗(yàn)與分析研究［J］.結(jié)構(gòu)工程，2004，19(1):3-40.

［5］ CAMERON BLACK，NICOS MAKRIS，IAN AIKEN. Component testing，stability analysis and characterization of buckling-restrained unbonded braces［R］. Pacific Earthquake Engineering Research Center， 2002.

［6］ 孫建華，羅開(kāi)海，王亞勇，等. 含屈曲約束耗能支撐的高層建筑地震作用效應(yīng)分析［J］. 工程抗震與加固改造，2007，29(4):1-8.

［7］ 羅開(kāi)海，程紹革，白雪霜，等. 屈曲約束耗能支撐力學(xué)性能分析［J］. 工程抗震與加固改造，2007，29(2):23-27.

［8］ 劉康安，黃冬生，程紹革，等. 一種帶縫隙和防滑凸起的屈曲約束耗能支撐：中國(guó)，ZL 200720200637.0［P］.2008-06-25.

［9］ GB50011—2001 建筑抗震設(shè)計(jì)規(guī)范［S］. 北京:中國(guó)建筑工業(yè)出版社，2001.

［10］ SEAOC/AISC Recommended provisions for buckling-restrained braced frame［S］.