中心支撑钢框架结构基于性能的塑性抗震设计
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摘要
根据功能平衡原理,提出了一种中心支撑钢框架结构基于性能的塑性设计方法。预先选定目标侧移和屈服机制,根据功能平衡方程即可得到结构的设计基底剪力。采用塑性设计法设计支撑构件和节点以便达到预期的屈服机制和性能。采用此方法对一幢6层中心支撑钢框架结构进行了设计,然后采用动力时程分析法验证了该方法的可行性,为中心支撑钢框架结构基于性能的塑性抗震设计法提供了一定的依据。
A performance-based plastic design( PBPD) methodology for steel concentrically braced frames( CBFs)was presented here. The designed base shear was obtained based on work-energy balance equations using pre-selected target drift and yield mechanism. Plastic design was performed to design bracing members and connection nodes in order to achieve the expected yield mechanism and behavior. The method was applied to design a six-storey steel concentrically braced frame,and the feasibility of the method was validated with inelastic dynamic analyses. It was shown that the story drifts are well within the target values,thus to meet the desired performance requirements. The proposed method provided a basis for performance-based plastic design of steel concentrically braced frames.
A performance-based plastic design( PBPD) methodology for steel concentrically braced frames( CBFs)was presented here. The designed base shear was obtained based on work-energy balance equations using pre-selected target drift and yield mechanism. Plastic design was performed to design bracing members and connection nodes in order to achieve the expected yield mechanism and behavior. The method was applied to design a six-storey steel concentrically braced frame,and the feasibility of the method was validated with inelastic dynamic analyses. It was shown that the story drifts are well within the target values,thus to meet the desired performance requirements. The proposed method provided a basis for performance-based plastic design of steel concentrically braced frames.
引文
[1]杨俊芬,顾强,万红,等.人字形中心支撑钢框架静力推覆试验与有限元分析[J].西安建筑科技大学学报,2010,42(5):656-662.YANG Jun-fen,GU Qiang,WAN Hong,et al.Research on pushover test of inverted-V concentrically braced steel frame[J].Journal of Xi’an University of Arhchitecture&Technology,2010,42(5):656-662.
[2]管克俭,王新武,彭少民.钢框架支撑体系的应用和分析方法[J].中国工程科学,2003(5):80-83.GUAN Ke-jian,WANG Xin-wu,PENG Shao-min.Design method and application of steel braced frames[J].Engineering Science,2003(5):80-83.
[3]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[4]樊长林,张善元,路国运.钢筋混凝土框架刚塑性抗震设计方法研究[J].世界地震工程,2009,25(3):67-73.FAN Chang-lin,ZHANG Shan-yuan,LU Guo-yun.Study on rigid-plastic seism ic design of reinforced concrete fram e structures[J].World Earthquake Engineering,2009,25(3):67-73.
[5]樊长林.强震下RC结构基于性能的刚塑性抗震设计方法研究[D].太原:太原理工大学,2010.
[6]辛力,梁兴文,白亮.RC框架结构直接基于位移的抗震优化设计方法[J].地震工程与工程振动,2008,28(5):79-86.XIN Li,LIANG Xing-wen,BAI Liang.Optimal method for direct displacement-based seismic design of RC frames[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(5):79-86.
[7]Medhekar M S,Kennedy D J L.Displacement-based seismic design of buildings-application[J].Engineering Structures,2000,22(3):210-221.
[8]Ghorbanie-Asl M.Performance-based seismic design of building structures[D].Carleton:Carleton University,Canada,2007.
[9]FEMA-445,Next-generation performance-based seismic design guidelines-program plan for new and existing buildings[S].Federal Emergency Management Agency,2006,Washington D.C.
[10]李刚.人字形中心支撑钢框架基于屈服点谱的性态抗震设计方法[D].苏州:苏州科技学院,2011.
[11]陈炯,姚忠,路志浩.钢结构中心支撑框架的抗震承载力设计[J].钢结构,2008,23(9):59-65.CHEN Jiong,YAO Zhong,LU Zhi-hao.Comments on strength design of concentrically-braced frames of earthquakeresistant steel structures[J].Steel Construction,2008,23(9):59-65.
[12]Sahoo D R,Chao S H.Performance-based plastic design method for buckling-restrained braced frames[J].Engineering Structures,2010,32(9);2950-2958.
[13]Bayat M R.Performance-based plastic design of earthquake resistant steel structures:concentrically braced frames,tall moment frames,plate shear wall frames[D].Arlington,Texas:The University of Texas at Arlington,USA,2010.
[14]Lee S S.Performance-based design of moment frames using target drift and yield mechanism[D].Michigan:The University of Michigan,USA,2002.
[15]GB50009-2012,建筑结构荷载规范[S].北京:中国建筑工业出版社,2012.
[2]管克俭,王新武,彭少民.钢框架支撑体系的应用和分析方法[J].中国工程科学,2003(5):80-83.GUAN Ke-jian,WANG Xin-wu,PENG Shao-min.Design method and application of steel braced frames[J].Engineering Science,2003(5):80-83.
[3]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[4]樊长林,张善元,路国运.钢筋混凝土框架刚塑性抗震设计方法研究[J].世界地震工程,2009,25(3):67-73.FAN Chang-lin,ZHANG Shan-yuan,LU Guo-yun.Study on rigid-plastic seism ic design of reinforced concrete fram e structures[J].World Earthquake Engineering,2009,25(3):67-73.
[5]樊长林.强震下RC结构基于性能的刚塑性抗震设计方法研究[D].太原:太原理工大学,2010.
[6]辛力,梁兴文,白亮.RC框架结构直接基于位移的抗震优化设计方法[J].地震工程与工程振动,2008,28(5):79-86.XIN Li,LIANG Xing-wen,BAI Liang.Optimal method for direct displacement-based seismic design of RC frames[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(5):79-86.
[7]Medhekar M S,Kennedy D J L.Displacement-based seismic design of buildings-application[J].Engineering Structures,2000,22(3):210-221.
[8]Ghorbanie-Asl M.Performance-based seismic design of building structures[D].Carleton:Carleton University,Canada,2007.
[9]FEMA-445,Next-generation performance-based seismic design guidelines-program plan for new and existing buildings[S].Federal Emergency Management Agency,2006,Washington D.C.
[10]李刚.人字形中心支撑钢框架基于屈服点谱的性态抗震设计方法[D].苏州:苏州科技学院,2011.
[11]陈炯,姚忠,路志浩.钢结构中心支撑框架的抗震承载力设计[J].钢结构,2008,23(9):59-65.CHEN Jiong,YAO Zhong,LU Zhi-hao.Comments on strength design of concentrically-braced frames of earthquakeresistant steel structures[J].Steel Construction,2008,23(9):59-65.
[12]Sahoo D R,Chao S H.Performance-based plastic design method for buckling-restrained braced frames[J].Engineering Structures,2010,32(9);2950-2958.
[13]Bayat M R.Performance-based plastic design of earthquake resistant steel structures:concentrically braced frames,tall moment frames,plate shear wall frames[D].Arlington,Texas:The University of Texas at Arlington,USA,2010.
[14]Lee S S.Performance-based design of moment frames using target drift and yield mechanism[D].Michigan:The University of Michigan,USA,2002.
[15]GB50009-2012,建筑结构荷载规范[S].北京:中国建筑工业出版社,2012.
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