摇摆桁架-BRB-钢框架体系地震失效模式与抗震性能分析
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摘要
建筑结构抗震设计所希望的结构地震失效模式是完全梁铰式失效,由于各种不确定性的存在,在实际地震中,结构是否能发生完全梁铰式失效是无法预知的。而防屈曲支撑构件(BRB)延性较大,在地震作用下可稳定地耗散地震输入结构的能量。鉴于此该文提出了一种摇摆桁架-BRB-钢框架体系,采用静力推覆分析方法,识别出了结构的主要地震失效模式,对其失效路径以进行了分析;对传统钢框架结构、摇摆桁架-钢框架体系、摇摆桁架-BRB-钢框架体系在小震、中震、大震作用下进行时程分析,并基于峰值层间位移角评价了三种结构的抗震性能。结果表明摇摆桁架-BRB-钢框架体系,在结构耗能减震、失效模式的优化控制,降低结构的残余变形等方面均起到了重要作用,新结构的侧向变形较传统钢框架结构更加均匀,结构整体参与耗能的能力更强。
The seismic failure mode of seismic design of building structures is the failure of full beam hinges. In reality, it is difficult to foresee the full beam hinge failure mode of the structure due to uncertainties. Owing to large ductility, Buckling-Restrained Braces(BRBs) can dissipate the energy impacted on structures subject to earthquakes. In view of this feature, a rocking truss-BRB-steel frame system is proposed in this study. The main failure modes of the structure were identified by the pushover analysis and its failure path was analyzed. Based on the time history analysis for cases of earthquakes with mild, moderate and severe intensities, peak story drifts and seismic performance of a conventional steel frame structure, a rocking truss-steel frame system and a rocking truss-BRB-steel frame system were compared and analyzed. The results showed that the rocking truss-BRB-steel frame system played an important role in the structural energy dissipation, the optimal control of the failure modes, and the reduction of the residual deformation of the structures. The lateral deformation of the rocking truss-BRB-steel frame system was more uniform than that of the traditional steel frame structure and the energy consumption of the whole-parts-structure was stronger.
The seismic failure mode of seismic design of building structures is the failure of full beam hinges. In reality, it is difficult to foresee the full beam hinge failure mode of the structure due to uncertainties. Owing to large ductility, Buckling-Restrained Braces(BRBs) can dissipate the energy impacted on structures subject to earthquakes. In view of this feature, a rocking truss-BRB-steel frame system is proposed in this study. The main failure modes of the structure were identified by the pushover analysis and its failure path was analyzed. Based on the time history analysis for cases of earthquakes with mild, moderate and severe intensities, peak story drifts and seismic performance of a conventional steel frame structure, a rocking truss-steel frame system and a rocking truss-BRB-steel frame system were compared and analyzed. The results showed that the rocking truss-BRB-steel frame system played an important role in the structural energy dissipation, the optimal control of the failure modes, and the reduction of the residual deformation of the structures. The lateral deformation of the rocking truss-BRB-steel frame system was more uniform than that of the traditional steel frame structure and the energy consumption of the whole-parts-structure was stronger.
引文
[1]Azuhata T,Midorikawa M,Ishihara T.Earthquake response reduction of buildings by rocking structural systems[C].SPIE’s 9th Annual International Symposium on Smart Structures and Materials,San Diego,California,United States,2002.Proceedings Volume4696:265―272.
[2]Midorikawa M,Azuhata T,Ishihara T.Shaking table tests on seismic response of steel braced frames with column uplift[J].Earthquake Engineering&Structural Dynamics,2006,35(14):1767―1785.
[3]Eatherton M R,Hajjar J F,Deierlein G G.Controlled rocking of steel-framed buildings with replaceable energy-dissipating fuses[C].The 14th World Conference on Earthquake Engineering,Beijing,China,2008:No.05-06-0026.
[4]Rojas C P P.Seismic analysis,design,and evaluation of post-tensioned friction damped connections for steel moment resisting frames[D].Bethlehem:Lehigh University Department of Civil and Environmental Engineering,2003.
[5]Grigorian M,Grigorian C.An introduction to the structural design of rocking wall-frames with a view to collapse prevention,self-alignment and repairability[J].The structural design of tall and special buildings,2016,25(2):93―111.
[6]冯玉龙,吴京,孟少平.连续摇摆墙-屈曲约束支撑框架抗震性能分析[J].工程力学,2016,33(Suppl 1):90―94.Feng Yulong,Wu Jing,Meng Shaoping.Seismic performance analysis of continuously rocking wall-buckling restrained braced frames[J].Engineering Mechanics,2016,33(Suppl 1):90―94.(in Chinese)
[7]吴守君,潘鹏,张鑫.框架-摇摆墙结构受力特点分析及其在抗震加固中的应用[J].工程力学,2016,33(6):54―60,67.Wu Soujun,Pan Peng,Zhang Xin.Characteristics of frame rocking wall structure and its application in aseismic retrofit[J].Engineering Mechanics,2016,33(6):54―60,67.(in Chinese)
[8]吴守君,潘鹏.摇摆填充墙-框架结构抗震性能研究[J].建筑结构学报,2015,36(10):81―87.Wu Shoujun,Pan Peng.Seismic performance evaluation of rocking infilled wall-frame structure[J].Journal of Building Structures,2015,36(10):81―87.(in Chinese)
[9]贾明明,张素梅,吕大刚,等.抑制屈曲支撑布置原则对钢框架抗震性能的影响[J].工程力学,2009,26(7):140―146.Jia Mingming,Zhang Sumei,LüDagang,et al.Influence of layout principle of buckling-restrained braces on aseismic performance of steel frame[J].Engineering Mechanics,2009,26(7):140―146.(in Chinese)
[10]杨宁.采用摇摆桁架和BRB的钢框架结构地震失效模式优化与控制[D].哈尔滨:哈尔滨工业大学,2016.Yang Ning.Optimization and control of failure modes of steel frames with rocking truss and BRBs[D].Harbin:Harbin Institute of Technology,2016.(in Chinese)
[11]FEMA P695,Quantification of building seismic performance factors[S].Washington,D.C.:Federal Emergency Management Agency,2009.
[12]贾明明,吕大刚,张素梅,等.防屈曲支撑钢框架基于延性的抗震性能设计[J].工程力学,2010,27(增刊2):201―206.Jia Mingming,LüDagang,Zhang Sumei,et al.Seismic performance-based design based on ductility of buckling-restrained braced steel frame[J].Engineering Mechanics,2010,27(Suppl 2):201―206.(in Chinese)
[13]吕大刚,贾明明.钢框架结构基于变形可靠度的全概率抗震设计[J].工程力学,2011,28(5):117―123.Lv Dagang,Jia Mingming.Full probability aseismic design of steel frame structures based on deformation reliability[J].Engineering Mechanics,2011,28(5):117―123.(in Chinese)
[14]曲哲,和田章,叶列平.摇摆墙在框架结构抗震加固中的应用[J].建筑结构学报,2011,32(9):11―19.Qu Zhe,Wada Akria,Ye Lieping.Seismic retrofit of frame structures using rocking wall system[J].Journal of Building Structures,2011,32(9):11―19.(in Chinese)
[2]Midorikawa M,Azuhata T,Ishihara T.Shaking table tests on seismic response of steel braced frames with column uplift[J].Earthquake Engineering&Structural Dynamics,2006,35(14):1767―1785.
[3]Eatherton M R,Hajjar J F,Deierlein G G.Controlled rocking of steel-framed buildings with replaceable energy-dissipating fuses[C].The 14th World Conference on Earthquake Engineering,Beijing,China,2008:No.05-06-0026.
[4]Rojas C P P.Seismic analysis,design,and evaluation of post-tensioned friction damped connections for steel moment resisting frames[D].Bethlehem:Lehigh University Department of Civil and Environmental Engineering,2003.
[5]Grigorian M,Grigorian C.An introduction to the structural design of rocking wall-frames with a view to collapse prevention,self-alignment and repairability[J].The structural design of tall and special buildings,2016,25(2):93―111.
[6]冯玉龙,吴京,孟少平.连续摇摆墙-屈曲约束支撑框架抗震性能分析[J].工程力学,2016,33(Suppl 1):90―94.Feng Yulong,Wu Jing,Meng Shaoping.Seismic performance analysis of continuously rocking wall-buckling restrained braced frames[J].Engineering Mechanics,2016,33(Suppl 1):90―94.(in Chinese)
[7]吴守君,潘鹏,张鑫.框架-摇摆墙结构受力特点分析及其在抗震加固中的应用[J].工程力学,2016,33(6):54―60,67.Wu Soujun,Pan Peng,Zhang Xin.Characteristics of frame rocking wall structure and its application in aseismic retrofit[J].Engineering Mechanics,2016,33(6):54―60,67.(in Chinese)
[8]吴守君,潘鹏.摇摆填充墙-框架结构抗震性能研究[J].建筑结构学报,2015,36(10):81―87.Wu Shoujun,Pan Peng.Seismic performance evaluation of rocking infilled wall-frame structure[J].Journal of Building Structures,2015,36(10):81―87.(in Chinese)
[9]贾明明,张素梅,吕大刚,等.抑制屈曲支撑布置原则对钢框架抗震性能的影响[J].工程力学,2009,26(7):140―146.Jia Mingming,Zhang Sumei,LüDagang,et al.Influence of layout principle of buckling-restrained braces on aseismic performance of steel frame[J].Engineering Mechanics,2009,26(7):140―146.(in Chinese)
[10]杨宁.采用摇摆桁架和BRB的钢框架结构地震失效模式优化与控制[D].哈尔滨:哈尔滨工业大学,2016.Yang Ning.Optimization and control of failure modes of steel frames with rocking truss and BRBs[D].Harbin:Harbin Institute of Technology,2016.(in Chinese)
[11]FEMA P695,Quantification of building seismic performance factors[S].Washington,D.C.:Federal Emergency Management Agency,2009.
[12]贾明明,吕大刚,张素梅,等.防屈曲支撑钢框架基于延性的抗震性能设计[J].工程力学,2010,27(增刊2):201―206.Jia Mingming,LüDagang,Zhang Sumei,et al.Seismic performance-based design based on ductility of buckling-restrained braced steel frame[J].Engineering Mechanics,2010,27(Suppl 2):201―206.(in Chinese)
[13]吕大刚,贾明明.钢框架结构基于变形可靠度的全概率抗震设计[J].工程力学,2011,28(5):117―123.Lv Dagang,Jia Mingming.Full probability aseismic design of steel frame structures based on deformation reliability[J].Engineering Mechanics,2011,28(5):117―123.(in Chinese)
[14]曲哲,和田章,叶列平.摇摆墙在框架结构抗震加固中的应用[J].建筑结构学报,2011,32(9):11―19.Qu Zhe,Wada Akria,Ye Lieping.Seismic retrofit of frame structures using rocking wall system[J].Journal of Building Structures,2011,32(9):11―19.(in Chinese)