基于RC桥梁墩柱的地震损伤模型比较分析
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摘要
随着基于性能抗震设计理论的发展,地震损伤指标在建立性能目标量化准则和加固决策方面受到重视。地震损伤模型的建立以及验证大多是以建筑结构为基础,鲜有以桥梁结构,更少针对桥梁结构对各种典型滞回模型进行比较总结。本文以钢筋混凝土桥墩为研究对象,对8个典型的地震损伤模型进行了对比分析研究。研究表明,不同损伤模型确定的损伤指数差异较大,损伤指数发展趋势与实际试验中破坏程度不能很好对应;Park&Ang模型与试验符合较好;刘伯权模型考虑了低周疲劳效应概念简单、应用方便。
Damage indices have the potential to play vital role in defining performance objectives and retrofit decision-making in earthquake regions with the development of performance based seismic design theory recently.However,a major limitation of existing indices is that they have been formulated and validated almost exclusively on the basis of building structures,neglecting bridge structures.In this paper,eight damage indices are evaluated by comparison of a series of bridge pier tests.On the basis of these comparisons,it appears that the indices which attempt to take account of the damage caused by repeated cycling give no more reliable indication of damage.The Park&Ang model provides a more reliable indication of the various damage levels.The Liu model which takes account of low-cyclic fatigue has clear concept and is easy for application.
Damage indices have the potential to play vital role in defining performance objectives and retrofit decision-making in earthquake regions with the development of performance based seismic design theory recently.However,a major limitation of existing indices is that they have been formulated and validated almost exclusively on the basis of building structures,neglecting bridge structures.In this paper,eight damage indices are evaluated by comparison of a series of bridge pier tests.On the basis of these comparisons,it appears that the indices which attempt to take account of the damage caused by repeated cycling give no more reliable indication of damage.The Park&Ang model provides a more reliable indication of the various damage levels.The Liu model which takes account of low-cyclic fatigue has clear concept and is easy for application.
引文
[1]Bertero R D,Bertero V V.Performance-based seismicengineering:the nedd for reliable conceptural comrehensiveapproch[J.]Earthquake Engineeringand Structure Dynamics,2002,31(3):627-652
[2]Hindi R A,Sexsmith R G.Inelastic damage analysis ofreinforced concrete bridge columns based on degradedmonotonic energy[J.]ASCE Journal of Bridge Engineering,2004,9(4):326-332
[3]Williams M S,Sexsmith R G.Seismic damage indices forconcrete structures:a state-of-art review[J.]EarthquakeSpectra,1995,11(3):319-349
[4]沈祖炎,董宝,曹文衔.结构损伤累积分析的研究现状和存在的问题[J.]同济大学学报,1997,25(2):135-140(Shen Zuyan,Dong Bao,Cao Wenxian.Development andevaluation of researches on damage cumulation analysis forbuilding structures[J.]Journal of Tongji University,1997,25(2):135-140(in Chinese))
[5]王振宇,刘晶波.建筑结构地震损伤评估的研究进展[J.]世界地震工程,2001,17(3):43-48(Wang Zhenyu,Liu Jingbo.The advances of studies on seismic damageassessment of building structures[J.]World Information ofEarthquake Engineering,2001,17(3):43-48(in Chinese))
[6]Roufaiel M S L,Meyer C.Analytical modeling of hystereticbehavior of R/C frames[J.]ASCE Journal of StructuralEngineering,1987,113(3):429-444
[7]Banon H.Prediction of seismic damage in reinforcedconcrete frames[D.]Illinois:University of Illinois atUrbana-Champaign,1980
[8]Stephens J E,Yao J T P.Damage assessment using responsemeasurements[J.]ASCE Journal of structural Engineering,1987,113(4):787-801
[9]Wang ML,Shah S P.Reinforced concrete hysteresis modelbased on the damage concept[J.]Earthquake Engineeringand Structure Dynamics,1987,15(8):993-1003
[10]Jeong G D,Iwan W D.The effect of earthquake durationon the damage of structures[J.]Earthquake Engineeringand Structure Dynamics,1988,16(8):1201-1211
[11]Park Y J,Ang A H-S.Mechanistic seismic damage modelfor reinforced concrete[J.]ASCE Journal of StructuralEngineering,1985,111(4):722-739
[12]王东升,冯启民,王国新.考虑低周疲劳寿命的改进Park-Ang地震损伤模型[J.]土木工程学报,2004,37(11):41-49(Wang Dongsheng,Feng Qimin,Wang Guoxin.A modified Park-Ang seismic damage model consideringlow-cycle fatigue life[J.]China Civil Engineering Journal,2004,37(11):41-49(in Chinese))
[13]刘伯权,白绍良,刘鸣.抗震结构的等效延性破坏准则及其子结构试验验证[J.]地震工程与工程振动,1997,17(3):77-83(Liu Boquan,Bai Shaoliang,Liu Ming.Equivalent ductility damage criteria of earthquake-resistantstructures and their verification by substructure method[J.]Earthquake Engineering and Engineering Vibration,1997,17(3):77-83(in Chinese))
[14]Hindi R A,Sexsmith R G.A proposed model for RC bridgecolumns under cyclic loading[J.]Earthquake Spectra,2001,17(2):261-290
[15]Williams M S,Villemure I,Sexsmith R G.Evaluation ofseismic damage indices for concrete elements loaded incombined shear and flexure[J.]ACI Structural Journal,1997,94(3):315-322
[16]Kim T H,Lee K M,Chung Y S,et al.Seismic damageassessment of reinforced concrete bridge columns[J].Earthquake Structures,2005,27(4):576-592
[17]Kunnath S K K.Cumulative seismic damage of reinforcedconcrete bridges piers[R.]State University of New Yorkat Buffalo,NCEER Report:97-100
[2]Hindi R A,Sexsmith R G.Inelastic damage analysis ofreinforced concrete bridge columns based on degradedmonotonic energy[J.]ASCE Journal of Bridge Engineering,2004,9(4):326-332
[3]Williams M S,Sexsmith R G.Seismic damage indices forconcrete structures:a state-of-art review[J.]EarthquakeSpectra,1995,11(3):319-349
[4]沈祖炎,董宝,曹文衔.结构损伤累积分析的研究现状和存在的问题[J.]同济大学学报,1997,25(2):135-140(Shen Zuyan,Dong Bao,Cao Wenxian.Development andevaluation of researches on damage cumulation analysis forbuilding structures[J.]Journal of Tongji University,1997,25(2):135-140(in Chinese))
[5]王振宇,刘晶波.建筑结构地震损伤评估的研究进展[J.]世界地震工程,2001,17(3):43-48(Wang Zhenyu,Liu Jingbo.The advances of studies on seismic damageassessment of building structures[J.]World Information ofEarthquake Engineering,2001,17(3):43-48(in Chinese))
[6]Roufaiel M S L,Meyer C.Analytical modeling of hystereticbehavior of R/C frames[J.]ASCE Journal of StructuralEngineering,1987,113(3):429-444
[7]Banon H.Prediction of seismic damage in reinforcedconcrete frames[D.]Illinois:University of Illinois atUrbana-Champaign,1980
[8]Stephens J E,Yao J T P.Damage assessment using responsemeasurements[J.]ASCE Journal of structural Engineering,1987,113(4):787-801
[9]Wang ML,Shah S P.Reinforced concrete hysteresis modelbased on the damage concept[J.]Earthquake Engineeringand Structure Dynamics,1987,15(8):993-1003
[10]Jeong G D,Iwan W D.The effect of earthquake durationon the damage of structures[J.]Earthquake Engineeringand Structure Dynamics,1988,16(8):1201-1211
[11]Park Y J,Ang A H-S.Mechanistic seismic damage modelfor reinforced concrete[J.]ASCE Journal of StructuralEngineering,1985,111(4):722-739
[12]王东升,冯启民,王国新.考虑低周疲劳寿命的改进Park-Ang地震损伤模型[J.]土木工程学报,2004,37(11):41-49(Wang Dongsheng,Feng Qimin,Wang Guoxin.A modified Park-Ang seismic damage model consideringlow-cycle fatigue life[J.]China Civil Engineering Journal,2004,37(11):41-49(in Chinese))
[13]刘伯权,白绍良,刘鸣.抗震结构的等效延性破坏准则及其子结构试验验证[J.]地震工程与工程振动,1997,17(3):77-83(Liu Boquan,Bai Shaoliang,Liu Ming.Equivalent ductility damage criteria of earthquake-resistantstructures and their verification by substructure method[J.]Earthquake Engineering and Engineering Vibration,1997,17(3):77-83(in Chinese))
[14]Hindi R A,Sexsmith R G.A proposed model for RC bridgecolumns under cyclic loading[J.]Earthquake Spectra,2001,17(2):261-290
[15]Williams M S,Villemure I,Sexsmith R G.Evaluation ofseismic damage indices for concrete elements loaded incombined shear and flexure[J.]ACI Structural Journal,1997,94(3):315-322
[16]Kim T H,Lee K M,Chung Y S,et al.Seismic damageassessment of reinforced concrete bridge columns[J].Earthquake Structures,2005,27(4):576-592
[17]Kunnath S K K.Cumulative seismic damage of reinforcedconcrete bridges piers[R.]State University of New Yorkat Buffalo,NCEER Report:97-100
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