高烈度区采用防屈曲支撑的钢框架结构优化设计及抗震性能评估
|
摘要
考虑到传统结构形式在高烈度设防地区应用的不足,为发挥防屈曲支撑结构体系的优势,结合某典型工程项目研究了钢管混凝土柱-型钢梁框架结构与防屈曲支撑相结合的结构体系的优化思路及抗震性能。采用基于性能的设计方法,对弹性阶段的支撑进行截面积优化,对弹塑性阶段的支撑进行屈服位移优化,并对结构体系进行抗震性能评估。研究结果表明:小震下该结构体系具有良好的抗侧刚度,满足弹性位移角限制要求;中震下防屈曲支撑开始进入屈服耗能阶段,主体结构基本保持弹性;大震下防屈曲支撑消耗大部分地震能量,减轻主体结构的损伤情况。钢框架-防屈曲支撑结构体系在高烈度设防地区具有良好的应用价值。
Considering the deficiency of traditional structure in areas with high seismic intensity and the advantage of structure with BRBs,the optimal design and the earthguake resistant performance of frame structure composed of concrete filled steel tubular column and steel beam with buckling-restraining braces were studied on the basis of a typical project.The optimal design of BRB in elastic stage and elasto-plastic stage and the evaluation of the structure's seismic performance were mainly conducted.The results show that this structure has a good lateral resistant ability to limit the interstory drift in the specified range under frequent intensity earthquake; the BRBs start to dissipate energy by yielding under basic intensity earthquake and the main structure remains essentially elastic; the BRBs dissipate most part of the seismic energy under rare intensity earthquake,which provides effective protection of the main frame structure.The structure system holds a real application value in high intensity area.
Considering the deficiency of traditional structure in areas with high seismic intensity and the advantage of structure with BRBs,the optimal design and the earthguake resistant performance of frame structure composed of concrete filled steel tubular column and steel beam with buckling-restraining braces were studied on the basis of a typical project.The optimal design of BRB in elastic stage and elasto-plastic stage and the evaluation of the structure's seismic performance were mainly conducted.The results show that this structure has a good lateral resistant ability to limit the interstory drift in the specified range under frequent intensity earthquake; the BRBs start to dissipate energy by yielding under basic intensity earthquake and the main structure remains essentially elastic; the BRBs dissipate most part of the seismic energy under rare intensity earthquake,which provides effective protection of the main frame structure.The structure system holds a real application value in high intensity area.
引文
[1]汪大绥,陈建兴,包联进,等.耗能减震支撑体系研究及其在世博中心工程中的应用[J].建筑结构学报,2010,31(5):117-123.WANG Dasui,CHEN Jianxing,BAO Lianjin.Study and application of seismic energy dissipation bracing system in the Expo Centre[J].Journal of Buildings Structures,2010,31(5):117-123.(in Chinese)
[2]刘建彬.防屈曲支撑及防屈曲支撑钢框架设计理论研究[D].北京:清华大学,2005.LIU Jianbin.Research on the design theory of buckling restrained brace and buckling restrained braced frames[D].Beijing:Tsinghua University,2005.(in Chinese)
[3]赵俊贤,吴斌.防屈曲支撑的工作机理及稳定性设计方法[J].地震工程与工程振动,2009,29(3):131-139.ZHAO Junxian,WU Bin.Working mechanism and stability design methods of buckling restrained braces[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(3):131-139.(in Chinese)
[4]王华琪.防屈曲支撑及耗能减震技术的研究与工程应用[D].上海:同济大学,2008.WANG Huaqi.Research and application of bucking restained brace and energy dissipation technology[D].Shanghai:Tongji University,2008.(in Chinese)
[5]程光煜,叶列平,崔鸿超.防屈曲耗能钢支撑设计方法的研究[J].建筑结构学报,2008,29(1):40-48.CHENG Guangyu,YE Lieping,CUI Hongchao.Study on the design method of buckling-restrained brace[J].Journal of Building Structures,2008,29(1):40-48.(in Chinese)
[6]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.ZHOU Yun.Structure design and application of buckling-restrained brace[M].Beijing:China Architecture&Building Press.2007.(in Chinese)
[7]Uang Chic-Ming,Nakashima Masayoshi,Tsai Keh-Chyuan.Research and application of buckling-restrained braced frames[J].Steel Structures,2004,82(4):301-313.
[8]河野昭彦,平田寛,履歴型ダンパー付多層骨組の地震時の応答層間変形角分布の改善法について.日本構造建築学会系論文集,第73巻,第634号.
[9]秋山宏,エネルギーの釣合に基づく建築物の耐震設計[M].東京:技報堂出版,1999.
[2]刘建彬.防屈曲支撑及防屈曲支撑钢框架设计理论研究[D].北京:清华大学,2005.LIU Jianbin.Research on the design theory of buckling restrained brace and buckling restrained braced frames[D].Beijing:Tsinghua University,2005.(in Chinese)
[3]赵俊贤,吴斌.防屈曲支撑的工作机理及稳定性设计方法[J].地震工程与工程振动,2009,29(3):131-139.ZHAO Junxian,WU Bin.Working mechanism and stability design methods of buckling restrained braces[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(3):131-139.(in Chinese)
[4]王华琪.防屈曲支撑及耗能减震技术的研究与工程应用[D].上海:同济大学,2008.WANG Huaqi.Research and application of bucking restained brace and energy dissipation technology[D].Shanghai:Tongji University,2008.(in Chinese)
[5]程光煜,叶列平,崔鸿超.防屈曲耗能钢支撑设计方法的研究[J].建筑结构学报,2008,29(1):40-48.CHENG Guangyu,YE Lieping,CUI Hongchao.Study on the design method of buckling-restrained brace[J].Journal of Building Structures,2008,29(1):40-48.(in Chinese)
[6]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.ZHOU Yun.Structure design and application of buckling-restrained brace[M].Beijing:China Architecture&Building Press.2007.(in Chinese)
[7]Uang Chic-Ming,Nakashima Masayoshi,Tsai Keh-Chyuan.Research and application of buckling-restrained braced frames[J].Steel Structures,2004,82(4):301-313.
[8]河野昭彦,平田寛,履歴型ダンパー付多層骨組の地震時の応答層間変形角分布の改善法について.日本構造建築学会系論文集,第73巻,第634号.
[9]秋山宏,エネルギーの釣合に基づく建築物の耐震設計[M].東京:技報堂出版,1999.