既有钢筋混凝土框架结构基于性能的抗震评估
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摘要
鉴于既有钢筋混凝土框架结构抗震性能评估中配箍不足的柱模型化方法的不足,基于集中塑性铰模型,建立了柱开裂、屈服、极限承载力直至失效的全过程能力曲线,并通过SAP2000用户自定义铰属性予以实现。经与已有试验对比,验证了该方法的可行性。最后,对一栋配箍不足的RC框架结构进行了Pushover分析。研究表明,采用程序默认弯曲铰将高估结构的承载能力及延性;默认弯曲铰和剪切铰又过低估计了结构的抗震能力,造成对结构破坏模式的误判。本文自定义铰模型可经济有效地指导既有钢筋混凝土框架结构的抗震加固。
For insufficient modeling methods of columns in seismic evaluation of existing reinforced concrete frames,based on the lumped hinge model,a capacity curve of column is proposed accounting for full states from cracking,yielding,ultimate bearing capacity to final collapse.The curve could be easily used through user-defined hinge property by SAP2000.By means of comparisons with test results of others,the reliability of the method is validated.Finally,an existing frame structure with insufficient transverse reinforcement is evaluated by pushover analysis.The results show that using the default flexural hinge generates an exceedingly high evaluation of the capacity and ductility of the structure,using the default flexural hinge and shear hinge produces a remarkably low evaluation of the capacity of the structure,and causes an incorrect presumption of the structure failure modes.The user-defined hinge model can be used effectively and economically to guide seismic strengthening of existing reinforced concrete frame structures.
For insufficient modeling methods of columns in seismic evaluation of existing reinforced concrete frames,based on the lumped hinge model,a capacity curve of column is proposed accounting for full states from cracking,yielding,ultimate bearing capacity to final collapse.The curve could be easily used through user-defined hinge property by SAP2000.By means of comparisons with test results of others,the reliability of the method is validated.Finally,an existing frame structure with insufficient transverse reinforcement is evaluated by pushover analysis.The results show that using the default flexural hinge generates an exceedingly high evaluation of the capacity and ductility of the structure,using the default flexural hinge and shear hinge produces a remarkably low evaluation of the capacity of the structure,and causes an incorrect presumption of the structure failure modes.The user-defined hinge model can be used effectively and economically to guide seismic strengthening of existing reinforced concrete frame structures.
引文
[1]GB50011-2010,建筑抗震设计规范[S]GB50011-2010,Code for Seismic Design of Buildings[S](in Chinese)
[2]ATC-40.Seismic Evaluation and Retrofit of ConcreteBuildings,Volume1[S].ATC-40Report.Applied Technology Council.Redwood City,California,1996
[3]FEMA356.The Seismic Rehabilitation of Buildings[S].Federal Emergency Management Agency,2000
[4]FEMA440.NEHRP Improvement of Nonlinear Static Seismic Analysis Procedured[S].Federal Emergency Management Agency,2005
[5]田颖,钱稼茹,刘凤阁.在用RC框架结构基于位移的抗震性能评估[J].建筑结构,2001,31(1):53～56Tian Ying,Qian Jia-ru,Liu Feng-ge.Displacement Based Seismic Performance Evaluation for Existing RC Frame Structures[J].Building Structure,2001,31(1):53～56,59(in Chinese)
[6]钱稼茹,康钊,赵作周,等.在用市政桥梁基于位移的抗震安全评估[J].工程力学,2006,23(S1):194～202Qian Jia-ru,Kang Zhao,Zhao Zuo-zhou,et al.Displacement-based Seismic Safety Assessment of Existing Municipal Bridges[J].Engineering Mechanics,2006,23(S1):194～202(in Chinese))
[7]黄超,季静,韩小雷,等.基于性能的既有钢筋混凝土建筑结构抗震评估与加固技术研究[J].地震工程与工程振动,2007,27(5):72～79Hung Chao,Ji Jing,Han Xiao-lei,et al.Research on Performance Based Seismic Evaluation and Strengthening for Existing Reinforced Concrete Structures[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(5):72～79(in Chinese))
[8]贺锐波,季静,韩小雷.既有钢筋混凝土高层建筑基于性能的抗震评估[J].广东土木与建筑,2009(1):11～14He Rui-bo,Ji Jing,Han Xiao-lei.Performance Based Seismic Evaluation for an Existing Reinforced Concrete High-rise Building[J].Guangdong Architecture Civil Engineering,2009(1):11～14(in Chinese))
[9]Ghobarah A.Seismic Assessment of Existing RC Structures[J].Structural Engineering and Materials,2000,2(1):60～71
[10]Kreslin M,Fajfar P.Seismic Evaluation of an Existing Complex RC Building[J].Bulletin of Earthquake Engineering,2010,8(2):363～385
[11]孙治国,王东升,李宏男,等.汶川地震钢筋混凝土框架震害及震后修复建议[J].自然灾害学报,2010,19(4):114～123Sun Zhi-guo,Wang Dong-sheng,Li Hong-nan,et al.Damage Investigation of RC Frames in WenchuanEarthquake and Suggestions for Post-earthquake Rehabilitation[J].Journal of Natural Disasters,2010,19(4):114～123(in Chinese))
[12]雷拓,吕西林,钱江,等.既有钢筋混凝土框架原位推覆试验研究[J].建筑结构学报,2009,30(5):23～30Lei Tuo,Lu Xi-lin,Qian Jian,et al.In-situ Pushover Test of an Existing Reinforced Concrete Frame[J].Journal of Building Structures,2009,30(5):23～30(in Chinese))
[13]邱明兵.建筑结构震害机理与概念设计[M].北京:中国建筑工业出版社,2011Qiu Ming-bing.Earthquake Damage Mechanism and Conceptual Design of Building Structures[M].Beijing:China Architecture&Building Press,2011(in Chinese))
[14]Elwood K J,Moehle J P.Dynamic Collapse Analysis for a Reinforced Concrete Frame Sustaining Shear and Axial Failures[J].Earthquake Engineering and Structural Dynamics,2008,37(7):991～1012
[15]Monti G,and Spacone E.Reinforced Concrete Fiber Beam Element with Bond-Slip[J].Journal of Structural Engineering,ASCE,2000,126(6):654～661
[16]Dhakal R,Maekawa K.Modeling for Postyield Buckled of Reinforcement[J].Journal of Structural Engineering,ASCE,2002,128(9):1139～1147
[17]Sung Y C,Liu K Y,Su C K,et al.A Study on Pushover Analyses of Reinforced Concrete Columns[J].Journal of Structural Engineering and Mechanics,2005,21(1):35
[18]Inel M,Ozmen H B.Effect of Hinge Properties inNonlinear Analysis of Reinforced Concrete Buildings[J].Engineering Structures,2006,28(11):1494～1502
[19]ATC-6.Seismic Design Guidelines for Highway Bridges[S].Applied Technology Council.Berkeley,California,1981
[20]PEER.PEER Structural Performance Database[DB].2003.http://nisee.berkeley.edu/spd/
[21]Computer and Structures Inc.SAP2000,Analysis Reference Manual,Version14.2.0[M].Berkeley:California,2008
[22]Priestly M J N,Seible F,Calvi G M.Seismic Design and Retrofit of Bridges[M].Wiley:New York,NY,1996
[23]龙炳煌,范华冰.一个具有轴压比和配筋率参数的开裂弯矩计算公式[J].建筑与结构设计,2006,30(5):23～30Long Bing-huang,Fan Hua-bing.Calculation and Analysis for Cracking Moment of Concrete Compressive and Flexural Member[J].Architectural and Structural Design,2006,30(5):23～30(in Chinese))
[24]Panagiotakos T B,Fardis M N.Deformations of Reinforced Concrete Members at Yielding and Ultimate[J].ACI Structural Journal,2001,98(2):135～148
[25]Elwood K J,Moehle J P.Drift Capacity of Reinforced Concrete Columns with Light Transverse Reinforcement[J].Earthquake Spectra,2005,21(1):71～89
[26]Elwood K J,Moehle J P.Axial Capacity Model for Shear-damaged Columns[J].ACI Structural Journal,2005,102(4):578～587
[2]ATC-40.Seismic Evaluation and Retrofit of ConcreteBuildings,Volume1[S].ATC-40Report.Applied Technology Council.Redwood City,California,1996
[3]FEMA356.The Seismic Rehabilitation of Buildings[S].Federal Emergency Management Agency,2000
[4]FEMA440.NEHRP Improvement of Nonlinear Static Seismic Analysis Procedured[S].Federal Emergency Management Agency,2005
[5]田颖,钱稼茹,刘凤阁.在用RC框架结构基于位移的抗震性能评估[J].建筑结构,2001,31(1):53～56Tian Ying,Qian Jia-ru,Liu Feng-ge.Displacement Based Seismic Performance Evaluation for Existing RC Frame Structures[J].Building Structure,2001,31(1):53～56,59(in Chinese)
[6]钱稼茹,康钊,赵作周,等.在用市政桥梁基于位移的抗震安全评估[J].工程力学,2006,23(S1):194～202Qian Jia-ru,Kang Zhao,Zhao Zuo-zhou,et al.Displacement-based Seismic Safety Assessment of Existing Municipal Bridges[J].Engineering Mechanics,2006,23(S1):194～202(in Chinese))
[7]黄超,季静,韩小雷,等.基于性能的既有钢筋混凝土建筑结构抗震评估与加固技术研究[J].地震工程与工程振动,2007,27(5):72～79Hung Chao,Ji Jing,Han Xiao-lei,et al.Research on Performance Based Seismic Evaluation and Strengthening for Existing Reinforced Concrete Structures[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(5):72～79(in Chinese))
[8]贺锐波,季静,韩小雷.既有钢筋混凝土高层建筑基于性能的抗震评估[J].广东土木与建筑,2009(1):11～14He Rui-bo,Ji Jing,Han Xiao-lei.Performance Based Seismic Evaluation for an Existing Reinforced Concrete High-rise Building[J].Guangdong Architecture Civil Engineering,2009(1):11～14(in Chinese))
[9]Ghobarah A.Seismic Assessment of Existing RC Structures[J].Structural Engineering and Materials,2000,2(1):60～71
[10]Kreslin M,Fajfar P.Seismic Evaluation of an Existing Complex RC Building[J].Bulletin of Earthquake Engineering,2010,8(2):363～385
[11]孙治国,王东升,李宏男,等.汶川地震钢筋混凝土框架震害及震后修复建议[J].自然灾害学报,2010,19(4):114～123Sun Zhi-guo,Wang Dong-sheng,Li Hong-nan,et al.Damage Investigation of RC Frames in WenchuanEarthquake and Suggestions for Post-earthquake Rehabilitation[J].Journal of Natural Disasters,2010,19(4):114～123(in Chinese))
[12]雷拓,吕西林,钱江,等.既有钢筋混凝土框架原位推覆试验研究[J].建筑结构学报,2009,30(5):23～30Lei Tuo,Lu Xi-lin,Qian Jian,et al.In-situ Pushover Test of an Existing Reinforced Concrete Frame[J].Journal of Building Structures,2009,30(5):23～30(in Chinese))
[13]邱明兵.建筑结构震害机理与概念设计[M].北京:中国建筑工业出版社,2011Qiu Ming-bing.Earthquake Damage Mechanism and Conceptual Design of Building Structures[M].Beijing:China Architecture&Building Press,2011(in Chinese))
[14]Elwood K J,Moehle J P.Dynamic Collapse Analysis for a Reinforced Concrete Frame Sustaining Shear and Axial Failures[J].Earthquake Engineering and Structural Dynamics,2008,37(7):991～1012
[15]Monti G,and Spacone E.Reinforced Concrete Fiber Beam Element with Bond-Slip[J].Journal of Structural Engineering,ASCE,2000,126(6):654～661
[16]Dhakal R,Maekawa K.Modeling for Postyield Buckled of Reinforcement[J].Journal of Structural Engineering,ASCE,2002,128(9):1139～1147
[17]Sung Y C,Liu K Y,Su C K,et al.A Study on Pushover Analyses of Reinforced Concrete Columns[J].Journal of Structural Engineering and Mechanics,2005,21(1):35
[18]Inel M,Ozmen H B.Effect of Hinge Properties inNonlinear Analysis of Reinforced Concrete Buildings[J].Engineering Structures,2006,28(11):1494～1502
[19]ATC-6.Seismic Design Guidelines for Highway Bridges[S].Applied Technology Council.Berkeley,California,1981
[20]PEER.PEER Structural Performance Database[DB].2003.http://nisee.berkeley.edu/spd/
[21]Computer and Structures Inc.SAP2000,Analysis Reference Manual,Version14.2.0[M].Berkeley:California,2008
[22]Priestly M J N,Seible F,Calvi G M.Seismic Design and Retrofit of Bridges[M].Wiley:New York,NY,1996
[23]龙炳煌,范华冰.一个具有轴压比和配筋率参数的开裂弯矩计算公式[J].建筑与结构设计,2006,30(5):23～30Long Bing-huang,Fan Hua-bing.Calculation and Analysis for Cracking Moment of Concrete Compressive and Flexural Member[J].Architectural and Structural Design,2006,30(5):23～30(in Chinese))
[24]Panagiotakos T B,Fardis M N.Deformations of Reinforced Concrete Members at Yielding and Ultimate[J].ACI Structural Journal,2001,98(2):135～148
[25]Elwood K J,Moehle J P.Drift Capacity of Reinforced Concrete Columns with Light Transverse Reinforcement[J].Earthquake Spectra,2005,21(1):71～89
[26]Elwood K J,Moehle J P.Axial Capacity Model for Shear-damaged Columns[J].ACI Structural Journal,2005,102(4):578～587
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