高层钢框架结构基于性能的塑性设计方法研究
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摘要
在罕遇地震作用下,根据现行规范设计的高层钢框架结构会经历较大的非弹性变形,其非弹性性能在一定程度上难以预测和控制。根据功能平衡原理,该文提出了一种高层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作为结构两个关键的性能极限状态。根据能量相等原则,即使结构单调达到目标侧移所需作的功等于等效弹塑性单自由度体系达到相同状态所需要的能量,来计算给定的地震水准下的设计基底剪力。采用塑性设计法设计框架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10层钢框架结构进行了设计,然后采用动力时程分析法和静力非线性分析法验证了该方法的可行性,为高层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。
Under major earthquakes,high-rise steel moment frames designed to the current codes will undergo inelastic deformations in an uncontrolled manner.According to the principle of work-energy conservation,this paper presents a performance-based plastic design(PBPD) method for the design of high-rise steel frames.The method uses pre-selected target drift and yield mechanisms as key performance indicators.The design base shear for a selected hazard level is calculated by equating the work needed to push the structure monotonically up to the target drift to that required by an equivalent single degree of freedom to achieve the same state.Plastic design is performed to detail the frame members and connections in order to achieve the targeted yield mechanism and behavior.The method has been successfully applied to a ten-storey steel moment resisting frame,and validated by inelastic dynamic analyses and pushover analysis.In the cases,the frames develop desired strong column sway mechanisms,and the story drifts are well within the target values,thus meeting the desired performance objectives.The addressed method herein can form a basis for the performance-based plastic design of high-rise steel frames.
Under major earthquakes,high-rise steel moment frames designed to the current codes will undergo inelastic deformations in an uncontrolled manner.According to the principle of work-energy conservation,this paper presents a performance-based plastic design(PBPD) method for the design of high-rise steel frames.The method uses pre-selected target drift and yield mechanisms as key performance indicators.The design base shear for a selected hazard level is calculated by equating the work needed to push the structure monotonically up to the target drift to that required by an equivalent single degree of freedom to achieve the same state.Plastic design is performed to detail the frame members and connections in order to achieve the targeted yield mechanism and behavior.The method has been successfully applied to a ten-storey steel moment resisting frame,and validated by inelastic dynamic analyses and pushover analysis.In the cases,the frames develop desired strong column sway mechanisms,and the story drifts are well within the target values,thus meeting the desired performance objectives.The addressed method herein can form a basis for the performance-based plastic design of high-rise steel frames.
引文
[1]GB50011-2010.建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB50011-2010.Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[2]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 Changlin,Zhang Shanyuan,Lu Guoyun.Study on rigid-plastic seism ic design of reinforced concrete frame structures[J].World Earthquake Engineering,2009,25(3):67-73.(in Chinese)
[3]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.Fan Changlin.Study on performance based rigid-plastic seismic design method to reinforced concrete structures under strong earthquake[D].Taiyuan:Taiyuan University of Technology,2010.(in Chinese)
[4]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 Xingwen,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.(in Chinese)
[5]Medhekar M S,Kennedy D J L.Displacement-based seismic design of buildings-application[J].Engineering Structures,2000,22(3):210-221.
[6]Ghorbanie-Asl M.Performance-based seismic design of building structures[D].Carleton:Carleton University,Canada,2007.
[7]FEMA 445.Next-generation performance-based seismic design guidelines-program plan for new and existing buildings[S].Washington D.C.:Federal Emergency Management Agency,2006.
[8]周磊.多层钢框架性态抗震设计—屈服点谱法[D].苏州:苏州科技学院硕士学位论文,2011.Zhou Lei.Performance-based seismic design of steel moment frames-Yield Point Spectra Method[D].Suzhou:Suzhou University of Science and Technology,2011.(in Chinese)
[9]Sahoo D R,Chao S H.Performance-based plastic design method for buckling-restrained braced frames[J].Engineering Structures,2010,32(9):2950-2958.
[10]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.
[11]Leelataviwat S,Saewon W,Goel S C.Application of energy balance concept in seismic evaluation of structures[D].Journal of Structural Engineering,2009,135(2):113-121.
[12]Lee S S.Performance-based design of moment frames using target drift and yield mechanism[D].Michigan:The University of Michigan,USA,2002.
[13]Leelataviwat S,Goel S C.and Stojadinovic B.Toward performance-based seismic design of structures[J].Earthquake Spectra,1999,15(3):435-461.
[14]GB50009-2006.建筑结构荷载规范[S].北京:中国建筑工业出版社,2006.GB50009-2006.Load code for the design of building structures[S].Beijing:China Architecture&Building Press,2006.(in Chinese)
[15]FEMA 356.Prestandard and commentary for the seismic rehabilitation of buildings[S].Washington D.C.:Federal Emergency Management Agency,2000.
[2]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 Changlin,Zhang Shanyuan,Lu Guoyun.Study on rigid-plastic seism ic design of reinforced concrete frame structures[J].World Earthquake Engineering,2009,25(3):67-73.(in Chinese)
[3]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.Fan Changlin.Study on performance based rigid-plastic seismic design method to reinforced concrete structures under strong earthquake[D].Taiyuan:Taiyuan University of Technology,2010.(in Chinese)
[4]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 Xingwen,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.(in Chinese)
[5]Medhekar M S,Kennedy D J L.Displacement-based seismic design of buildings-application[J].Engineering Structures,2000,22(3):210-221.
[6]Ghorbanie-Asl M.Performance-based seismic design of building structures[D].Carleton:Carleton University,Canada,2007.
[7]FEMA 445.Next-generation performance-based seismic design guidelines-program plan for new and existing buildings[S].Washington D.C.:Federal Emergency Management Agency,2006.
[8]周磊.多层钢框架性态抗震设计—屈服点谱法[D].苏州:苏州科技学院硕士学位论文,2011.Zhou Lei.Performance-based seismic design of steel moment frames-Yield Point Spectra Method[D].Suzhou:Suzhou University of Science and Technology,2011.(in Chinese)
[9]Sahoo D R,Chao S H.Performance-based plastic design method for buckling-restrained braced frames[J].Engineering Structures,2010,32(9):2950-2958.
[10]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.
[11]Leelataviwat S,Saewon W,Goel S C.Application of energy balance concept in seismic evaluation of structures[D].Journal of Structural Engineering,2009,135(2):113-121.
[12]Lee S S.Performance-based design of moment frames using target drift and yield mechanism[D].Michigan:The University of Michigan,USA,2002.
[13]Leelataviwat S,Goel S C.and Stojadinovic B.Toward performance-based seismic design of structures[J].Earthquake Spectra,1999,15(3):435-461.
[14]GB50009-2006.建筑结构荷载规范[S].北京:中国建筑工业出版社,2006.GB50009-2006.Load code for the design of building structures[S].Beijing:China Architecture&Building Press,2006.(in Chinese)
[15]FEMA 356.Prestandard and commentary for the seismic rehabilitation of buildings[S].Washington D.C.:Federal Emergency Management Agency,2000.
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