抑制屈曲支撑布置原则对钢框架抗震性能的影响
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摘要
安装抑制屈曲支撑可提高钢框架结构抗震性能,但抑制屈曲支撑布置原则对其耗能减振作用的发挥有重要影响。基于ANSYS采用弹塑性静力分析和弹塑性动力分析,基于9层Benchmark钢框架结构模型对抑制屈曲支撑三种不同布置原则对结构抗震性能的影响进行了分析。结果表明:基于支撑与框架刚度比或基于结构层间剪力分布布置支撑时结构延性较好,其中基于支撑与框架刚度比布置支撑时结构的层间位移角分布最均匀,其对提高结构体系抗侧刚度和耗能能力最为有效。因此在对抑制屈曲支撑钢框架进行设计时,宜采用基于支撑与框架刚度比布置支撑的方法。
When the steel frames are installed with Buckling-Restrained Braces(BRBs), whose aseismic performance will be improved, but the function of energy dissipation and vibration control is influenced by the layout principle of BRBs.The elastoplastic static and dynamic analysis based on ANSYS was carried out.Based on 9 storey Benchmark steel frame structure, the influence of three layout principles of BRBs on structural aseismic performance was analyzed.While the BRBs are disposed by the basis of the stiffness proportion of BRBs with steel frames and storey displacement angle distributions, the ductility performance of the steel frame with BRBs is better.If the storey displacement angles are more uniform, the stiffness and energy dissipation are larger when the BRBs are disposed based on the stiffness proportion of BRBs with steel frames.So when the steel frame with BRBs is designed, it is appropriate that the BRBs are disposed by the basis of the stiffness proportion of BRBs with the steel frame.
When the steel frames are installed with Buckling-Restrained Braces(BRBs), whose aseismic performance will be improved, but the function of energy dissipation and vibration control is influenced by the layout principle of BRBs.The elastoplastic static and dynamic analysis based on ANSYS was carried out.Based on 9 storey Benchmark steel frame structure, the influence of three layout principles of BRBs on structural aseismic performance was analyzed.While the BRBs are disposed by the basis of the stiffness proportion of BRBs with steel frames and storey displacement angle distributions, the ductility performance of the steel frame with BRBs is better.If the storey displacement angles are more uniform, the stiffness and energy dissipation are larger when the BRBs are disposed based on the stiffness proportion of BRBs with steel frames.So when the steel frame with BRBs is designed, it is appropriate that the BRBs are disposed by the basis of the stiffness proportion of BRBs with the steel frame.
引文
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[2]Xie Qiang.State of the art of buckling-restrained braces in Asia[J].Journal of Constructional Steel Research,2005,61(6):727―748.
[3]汪家铭,中岛正爱.屈曲约束支撑体系的应用与研究进展(I)[J].陆烨,译.建筑钢结构进展,2005,7(1):1―12.Uang Chiaming,Nakashima Masayoshi.The practice and research development of buckling-restrained braced frames(I)[J].Translate by Lu Ye.Progress in Steel Building Structure,2005,7(1):1―12.(in Chinese)
[4]汪家铭,中岛正爱.屈曲约束支撑体系的应用与研究进展(II)[J].陆烨,译.建筑钢结构进展,2005,7(2):1―11.Uang Chiaming,Nakashima Masayoshi.The practice and research development of buckling-restrained braced frames(II)[J].Translate by Lu Ye.Translate by Lu Ye.Progress in Steel Building Structure,2005,7(2):1―11.(in Chinese)
[5]Ochoa Escudero E.Comparative parametric study on normal and buckling restrained steel braces[D].di Pavia:Rose School,2003.
[6]Sabelli R,Mahin S,Chang C.Seismic demands on steel braced frame buildings with buckling-restrained Braces[J].Engineering Structures,2003,25(5):655―666.
[7]Fahnestock L A,Sause R,Ricles J M.Seismic response and performance of buckling-restrained braced frames[J].Journal of Structural Engineering,ASCE,2007,133(9):1195―1204.
[8]Fahnestock L A,Ricles J M,Sause R.Experimental evaluation of a large-scale buckling-restrained braced frame[J].Journal of Structural Engineering,ASCE,2007,133(9):1205―1214.
[9]Tremblay R,Boulduc P,Neville R,Devall R.Seismic testing and performance of buckling-restrained bracing systems[J].Canadian Journal of Civil Engineering,2006,33(2):183―198.
[10]欧进萍.结构振动控制:主动、半主动和智能控制[M].北京:科学出版社,2003:490―510.Ou Jinping.Structural vibration control:Active,Semi-active and Intelligent control[M].Beijing:Science Press,2003:490―510.(in Chinese)
[11]贾明明,张素梅.采用抑制屈曲支撑的钢框架结构性能分析[J].东南大学学报(自然科学版),2007,37(6):1041―1047.Jia Mingming,Zhang Sumei.Performance of steel frame installed with buckling-restrained braces[J].Journal of Southeast University(Natural Science Edition),2007,37(6):1041―1047.(in Chinese)
[12]贾明明,张素梅.无粘结支撑钢框架弹塑性时程分析[J].哈尔滨工业大学学报,2005,37(增):10―13.Jia Mingming,Zhang Sumei.Elastoplastic time-history analysis of steel frame with unbonded braces[J].Journal of Harbin Institute of Technology,2005,37(Sup.):10―13.(in Chinese)
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