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含有屈曲約束支撐框架的振動臺試驗研究
程紹革,羅開海,孔祥雄
摘 要
 
(中國建筑科學(xué)研究院工程抗震研究所,北京 100013)
[摘要]通過對含有屈曲約束支撐的框架進(jìn)行振動臺試驗,研究了屈曲約束支撐對結(jié)構(gòu)地震反應(yīng)的減震效果。選用3條天然波和1條人工波進(jìn)行加載,記錄了模型的加速度反應(yīng),分析了BRB在試驗中的力學(xué)性能,并與理論計算值進(jìn)行了對比,研究了臺面輸入加速度為0.6g和1.0g時框架底層BRB的滯回曲線。探討了不同臺面輸入下輸入能量在模型中的分布情況。試驗及研究結(jié)果表明,當(dāng)臺面輸入加速度小于0.6g時,屈曲約束支撐可以為結(jié)構(gòu)提供穩(wěn)定的側(cè)向剛度;當(dāng)臺面輸入加速度大于0.6g時,屈曲約束支撐通過自身塑性變形來吸收能量;當(dāng)臺面輸入加速度為1.0g時,屈曲約束支撐可以吸收臺面輸入的20%~40%的能量。
[關(guān)鍵詞]屈曲約束支撐; 含有屈曲約束支撐的框架; 振動臺試驗; 耗能性能
Experiment study on shaking table test of steel frame with buckling-restrained braces
Cheng Shaoge,Luo Kaihai,Kong Xiangxiong(Institute of Earthquake Engineering, China Academy of Building Research, Beijing 100013, China)
Abstract:A buckling-restrained braced frame (BRBF) was tested by shaking table to study the mechanism and efficiency of buckling-restrained brace (BRB) for reducing the seismic responses of the structure. Three natural earthquake waves and one test wave were selected. The accelerations of the model were recorded and the mechanical properties of BRB were analyzed. The hysteresis loops of BRB were studied when the PGA equal to 0.6g and 1.0g, and the energy distribution of the model was discussed. The test results indicate that BRB can provide stable stiffness to the structure when PGA is less than 0.6g and can get into elasto-plastic stage to dissipate the energy when PGA is more than 0.6g. The results also indicate that BRB can absorb 20%~40% of the whole input energy when PGA reaches 1.0g.
Keywords:buckling-restrained brace; buckling-restrained braced frame; shaking table test; energy dissipation characteristics
“十一五”國家科技支撐計劃的重點(diǎn)項目(2006BAJ13B01)。
作者簡介:程紹革,研究員,Email:chengshaoge@163.com。
參考文獻(xiàn)
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[2] 汪家銘, 中島正愛, 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.
[3] 汪家銘, 中島正愛. 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.
[4] 羅開海,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.
[5] 羅開海,孔祥雄,程紹革. 一種新型屈曲約束支撐的研制與試驗研究[J]. 建筑結(jié)構(gòu),2010,40(10):1-6.
[6] 孔祥雄,羅開海,程紹革. 含有屈曲約束支撐平面框架的抗震性能試驗研究[J]. 建筑結(jié)構(gòu),2010,40(10):7-10.
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