低屈服点全钢防屈曲支撑抗震性能试验研究
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摘要
目前防屈曲支撑在大跨高层钢框架结构中应用广泛,其形式复杂多样,性能良莠不齐。为研究低屈服点全钢防屈曲支撑产品的抗震性能,对日本住金关西工业株式会社的4个低屈服点防屈曲支撑构件进行拉压往复加载试验研究,试验测定各试件的轴力和轴向相对位移曲线,结果显示试件均以加劲肋焊缝或芯材的超低周疲劳断裂为破坏模式,试件滞回曲线饱满,无捏拢退化现象。分析表明,此类构件能防止芯材在屈服前发生压曲,充分发挥低屈服点钢材延性好的优势。试件在循环荷载作用下,强化特征明显,强化后的应力能达到初始应力的2~4倍。该类试件在往复荷载下等效黏性阻尼比较大,具有良好的塑性变形能力和耗能能力。
Nowadays,the buckling-restrained braces with various forms and performances have been widely used in large-span and high-rise steel structures.To study the seismic behavior of buckling-restrained braces with low yield point,four specimens produced by a Japanese company—Sumikin Kansai Industries Co.,Ltd.were tested under cyclic loading,and the corresponding load-displacement curves were recorded.Test results showed that all specimens failed due to the fatigue fracture of the stiffener weld or steel core,and hysteresis curves of all specimens were full without degradation or pinching.It is known from the analysis that such components could prevent their buckling before the yielding of steel core with the ductility of low yield point steel developed sufficiently.Under the cyclic loading,the hardening characteristics of specimens were remarkable with hardened stress as 2 ~ 4 times of initial stress.Besides,under cyclic loading,the equivalent viscous damping ratio was large so that such specimens may possess good capacities in plastic deformation and energy dissipation.
Nowadays,the buckling-restrained braces with various forms and performances have been widely used in large-span and high-rise steel structures.To study the seismic behavior of buckling-restrained braces with low yield point,four specimens produced by a Japanese company—Sumikin Kansai Industries Co.,Ltd.were tested under cyclic loading,and the corresponding load-displacement curves were recorded.Test results showed that all specimens failed due to the fatigue fracture of the stiffener weld or steel core,and hysteresis curves of all specimens were full without degradation or pinching.It is known from the analysis that such components could prevent their buckling before the yielding of steel core with the ductility of low yield point steel developed sufficiently.Under the cyclic loading,the hardening characteristics of specimens were remarkable with hardened stress as 2 ~ 4 times of initial stress.Besides,under cyclic loading,the equivalent viscous damping ratio was large so that such specimens may possess good capacities in plastic deformation and energy dissipation.
引文
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[10]李培彬,娄宇,赵广鹏,等.屈曲约束支撑在北京银泰中心结构抗震设计中的应用[J].建筑结构,2007,37(11):5-7(Li Peibin,Lou Yu,Zhao Guangpeng,et al.Using unbonded braces in aseismatic design for steel tower of Beijing Yintai Center[J].Building Structure,2007,37(11):5-7(in Chinese))
[11]周晓峰,胡佳轶,潘其健,等.东方体育中心抗震设计及屈曲约束支撑的应用[J].防灾减灾工程学报,2010,30(增1):126-131
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[13]Chen C C,Lu L W.Development and expereimental investigation of a ductile CBF system[C]//Proceedings of the 4th National Conference on Earthquake Engineering.California,1990
[14]Clark W,Kasai K,Aiken I D,et al.Evaluation of design methodologies for structures incorporating steel unbounded braces for energy dissipation[C]//Proceedings of the 12th World Conference on Earthquake Engineering.Upper Hutt,2000
[15]Watanabe A,Hitomi Y,Saeki E,et al.Properties of brace encased in buckling-restraining concrete and steel tube[C]//Proceedings of the 9th World Conference on Earthquake Engineering.Tokyo,1989
[16]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006
[17]Chen C,Chen S,Liaw J.Application of low yield strength steel on controlled plastification ductile concentrically braced frames[J].Canadian Journal of Civil Engineering,2001,28(5):823-836
[18]宋凤明,温东辉,李自刚.抗震用极低屈服点钢组织和性能研究[J].热加工工艺,2008,37(22):28-31(Song Fengming,Wen Donghui,Li Zigang.Study on microstructure and properties of ultra-low yield strength steel for earthquake resistant[J].Hot Working Technology,2008,37(22):28-31(in Chinese))
[19]李玉顺,大井谦一,沈世钊.极低屈服点软钢阻尼器恢复力模型的研究[J].地震工程与工程振动,2004,24(6):142-145,153(Li Yushun,Kenichi O,Shen Shizhao.Study on hysteresis loops of dampers made of ultra low yield point steel[J].Earthquake Engineering and Engineering Vibration,2004,24(6):142-145,153(in Chinese))
[20]刘瑞,李玉顺.极低屈服点钢材在耗能减震控制中的应用[J].低温建筑技术,2006(2):52-53(Liu Rui,Li Yushun.Practice of ultra low yield point steel in earthquake mitigation control[J].Low Temperature Architecture Technology,2006(2):52-53(in Chinese))
[21]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB 50011—2010 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[22]陈绍蕃,顾强.钢结构上册——钢结构基础[M].北京:中国建筑工业出版社,2007
[23]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2008:259-260
[24]ANSI/AISC 341—2010 Seismic provisions for structural steel buildings[S].Chicago:AISC,2010
[25]高向宇,杜海燕,张惠,等.国标Q235热轧钢材防屈曲支撑抗震性能试验研究[J].建筑结构,2008,38(3):91-95(Gao Xiangyu,Du Haiyan,Zhang Hui,et al.Experimental study on seismic performance of bucklingrestrained brace made of Q235 hot-rolled steel in China[J].Building Structure,2008,38(3):91-95(in Chinese))
[2]周云.防屈曲耗能支撑结构设计与应用[M].北京:中国建筑工业出版社,2007
[3]汪家铭,中岛正爱,陆烨.屈曲约束支撑体系的应用与研究进展(Ⅰ)[J].建筑钢结构进展,2005,7(1):1-12(Uang Chiaming,Nakashima M,Lu Ye.The practice and research development of buckling-restrained braced frames(Ⅰ)[J].Progress in Steel Building Structures,2005,7(1):1-12(in Chinese))
[4]Xie Q.State of the art of buckling-restrained braces in Asia[J].Journal of Constructional Steel Research,2005,61(6):727-748
[5]Mamoru I,Masatoshi M.Buckling-restrained brace using steel mortar planks:performance evaluation as a hysteretic damper[J].Earthquake Engineering&Structural Dynamics,2006,35(14):1807-1826
[6]Brown A P,Aiken D I,Jafarzadeh F J.Buckling restrained braces provide the key to the seismic retrofit of the Wallace F.Bennet Federal Building[J].Modern Steel Construction,2001,41(8):29-37
[7]蔡克铨,黄彦智,翁崇兴.双管式挫屈束制(屈曲约束)支撑之耐震行为与应用[J].建筑钢结构进展,2005,7(3):1-8(Tsai K C,Hwang Y C,Weng C S.Seismic performance and applications of double-tube bucklingrestrained braces[J].Progress in Steel Building Structures,2005,7(3):1-8(in Chinese))
[8]程光煜,叶列平,许秀珍,等.防屈曲耗能钢支撑的试验研究[J].建筑结构学报,2008,29(1):31-39(Cheng Guangyu,Ye Lieping,Xu Xiuzhen,et al.Experimental researches on buckling-restrained brace[J].Journal of Building Structures,2008,29(1):31-39(in Chinese))
[9]马宁,吴斌,赵俊贤,等.十字形内芯全钢防屈曲支撑构件及子系统足尺试验[J].土木工程学报,2010,43(4):1-7(Ma Ning,Wu Bin,Zhao Junxian,et al.Full scale uniaxial and subassemblage tests on the seismic behavior of all-steel buckling-resistant brace[J].China Civil Engineering Journal,2010,43(4):1-7(in Chinese))
[10]李培彬,娄宇,赵广鹏,等.屈曲约束支撑在北京银泰中心结构抗震设计中的应用[J].建筑结构,2007,37(11):5-7(Li Peibin,Lou Yu,Zhao Guangpeng,et al.Using unbonded braces in aseismatic design for steel tower of Beijing Yintai Center[J].Building Structure,2007,37(11):5-7(in Chinese))
[11]周晓峰,胡佳轶,潘其健,等.东方体育中心抗震设计及屈曲约束支撑的应用[J].防灾减灾工程学报,2010,30(增1):126-131
[12]孙建华,罗开海,王亚勇,等.含屈曲约束耗能支撑的高层建筑地震作用效应分析[J].工程抗震与加固改造,2007,29(4):1-8,12(Sun Jianhua,Luo Kaihai,Wang Yayong,et al.Analysis of the earthquake load effects of a high-rise building with buckling restrained energydissipation braces(BREB)included[J].Earthquake Resistant Engineering and Retrofitting,2007,29(4):1-8,12(in Chinese))
[13]Chen C C,Lu L W.Development and expereimental investigation of a ductile CBF system[C]//Proceedings of the 4th National Conference on Earthquake Engineering.California,1990
[14]Clark W,Kasai K,Aiken I D,et al.Evaluation of design methodologies for structures incorporating steel unbounded braces for energy dissipation[C]//Proceedings of the 12th World Conference on Earthquake Engineering.Upper Hutt,2000
[15]Watanabe A,Hitomi Y,Saeki E,et al.Properties of brace encased in buckling-restraining concrete and steel tube[C]//Proceedings of the 9th World Conference on Earthquake Engineering.Tokyo,1989
[16]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006
[17]Chen C,Chen S,Liaw J.Application of low yield strength steel on controlled plastification ductile concentrically braced frames[J].Canadian Journal of Civil Engineering,2001,28(5):823-836
[18]宋凤明,温东辉,李自刚.抗震用极低屈服点钢组织和性能研究[J].热加工工艺,2008,37(22):28-31(Song Fengming,Wen Donghui,Li Zigang.Study on microstructure and properties of ultra-low yield strength steel for earthquake resistant[J].Hot Working Technology,2008,37(22):28-31(in Chinese))
[19]李玉顺,大井谦一,沈世钊.极低屈服点软钢阻尼器恢复力模型的研究[J].地震工程与工程振动,2004,24(6):142-145,153(Li Yushun,Kenichi O,Shen Shizhao.Study on hysteresis loops of dampers made of ultra low yield point steel[J].Earthquake Engineering and Engineering Vibration,2004,24(6):142-145,153(in Chinese))
[20]刘瑞,李玉顺.极低屈服点钢材在耗能减震控制中的应用[J].低温建筑技术,2006(2):52-53(Liu Rui,Li Yushun.Practice of ultra low yield point steel in earthquake mitigation control[J].Low Temperature Architecture Technology,2006(2):52-53(in Chinese))
[21]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB 50011—2010 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[22]陈绍蕃,顾强.钢结构上册——钢结构基础[M].北京:中国建筑工业出版社,2007
[23]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2008:259-260
[24]ANSI/AISC 341—2010 Seismic provisions for structural steel buildings[S].Chicago:AISC,2010
[25]高向宇,杜海燕,张惠,等.国标Q235热轧钢材防屈曲支撑抗震性能试验研究[J].建筑结构,2008,38(3):91-95(Gao Xiangyu,Du Haiyan,Zhang Hui,et al.Experimental study on seismic performance of bucklingrestrained brace made of Q235 hot-rolled steel in China[J].Building Structure,2008,38(3):91-95(in Chinese))
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