基于地震输入能量的刚度退化单自由度体系非弹性变形简化计算方法
|
摘要
以简化成单自由度(SDOF)体系结构在地震作用下的输入能量为基础,研究地震输入能量和结构最大变形之间的关系。对于刚度退化SDOF体系,引入表征能量和变形间关系的等效速度比参数,以3种场地下的214条近断层地震记录为输入,采用非线性时程计算和统计分析方法,提取累积输入能量、瞬时输入能量和非弹性变形间关系的分布特征,提出了不同场地下等效速度比的分段线性化函数,并用多自由度(MDOF)桥墩算例的时程计算结果进行了对比分析。结果表明:所建议的简化计算方法是有效的,可用于基于能量的桥梁结构抗震设计与评估。
Based on input energy of structure under seismic effect which is simplified as single degree of freedom(SDOF) systems,the special relationship between input energy and structural maximum deformation was studied.For stiffness degradation SDOF system,relation of cumulative input energy,momentary input energy and inelastic deformation was studied by introduction of the parameter of equivalent velocity ratio.Using inelastic time history analysis of SDOF system excited by 214 near-fault earthquake records from 3 kinds of soil sites,the distribution characteristic of the above relation was extracted by statistical analysis.The piecewise linear functions of equivalent velocity ratios under different sites were presented.Calculated results of time history of multiple degrees of freedom(MDOF) bridge pier were analyzed.Results show that the proposed simplified calculation method which can be used for energy-based seismic design and assessment of bridge structures is effective.
Based on input energy of structure under seismic effect which is simplified as single degree of freedom(SDOF) systems,the special relationship between input energy and structural maximum deformation was studied.For stiffness degradation SDOF system,relation of cumulative input energy,momentary input energy and inelastic deformation was studied by introduction of the parameter of equivalent velocity ratio.Using inelastic time history analysis of SDOF system excited by 214 near-fault earthquake records from 3 kinds of soil sites,the distribution characteristic of the above relation was extracted by statistical analysis.The piecewise linear functions of equivalent velocity ratios under different sites were presented.Calculated results of time history of multiple degrees of freedom(MDOF) bridge pier were analyzed.Results show that the proposed simplified calculation method which can be used for energy-based seismic design and assessment of bridge structures is effective.
引文
[1]DECANINI L D,MOLLAIOLI F.An Energy-basedMethodology for the Assessment of Seismic Demand[J].Soil Dynamics and Earthquake Engineering,2001,21(2):113-137.
[2]FAJFAR P.Equivalent Ductility Factor,Taking intoAccount Low-cycle Fatigue[J].Earthquake Engineer-ing&Structural Dynamics,1992,21(9):837-848.
[3]TERAN-GILMORE A.Performance-based Earthquake-resistant Design of Framed Buildings Using EnergyConcepts[D].Berkeley:University of California,Berkeley,1996.
[4]YE L P,OTANI S.Maximum Seismic Displacementof Inelastic Systems Based on Energy Concept[J].Earthquake Engineering&Structural Dynamics,1999,28(12):1483-1499.
[5]HORI N,INOUE N.Damaging Properties of GroundMotions and Prediction of Maximum Response ofStructures Based on Momentary Energy Response[J].Earthquake Engineering&Structural Dynamics,2002,31(9):1657-1679.
[6]胡冗冗,王亚勇.地震动瞬时能量与结构最大位移反应关系研究[J].建筑结构学报,2000,21(1):71-76.HU Rong-rong,WANG Ya-yong.A Study on Rela-tion of Instantaneous Energy of Earthquake StrongMotion and Maximum Displacement Response ofStructures[J].Journal of Building Structures,2000,21(1):71-76.
[7]胡冗冗,王亚勇.基于瞬时输入能量的SDOF弹塑性结构最大位移反应分析[J].世界地震工程,2002,18(4):155-158.HU Rong-rong,WANG Ya-yong.Maximum SeismicDisplacement of Inelastic SDOF Structure Based onMomentary Input Energy[J].World Earthquake En-gineering,2002,18(4):155-158.
[8]肖明葵,白绍良,赖明,等.基于滞回耗能的抗震结构最大位移反应[J].重庆大学学报,2003,26(3):133-137.XIAO Ming-kui,BAI Shao-liang,LAI Ming,et al.Maximum Displacement Estimation of Seismic Struc-tures Based on Hysteresis Energy[J].Journal ofChongqing University,2003,26(3):133-137.
[9]江辉,朱晞.近断层地震动考虑能量损伤效应的非弹性强度需求[J].中国安全科学学报,2005,15(5):8-12.JIANG Hui,ZHU Xi.Inelastic Strength Demand ofNear-fault Ground Motions Considering Energy Dam-age Effect[J].China Safety Journal,2005,15(5):8-12.
[10]江辉.近场地震下桥梁结构基于性能抗震设计的能量方法[D].北京:北京交通大学,2007.JIANG Hui.Performance-based Seismic Design ofBridge Structure Excited by Near-fault EarthquakeUsing Energy Concept[D].Beijing:Beijing JiaotongUniversity,2007.
[11]HINDI R A,SEXSMITH R G.Inelastic DamageAnalysis of Reinforced Concrete Bridge ColumnsBased on Degraded Monotonic Energy[J].Journal ofBridge Engineering,2004,9(4):326-332.
[2]FAJFAR P.Equivalent Ductility Factor,Taking intoAccount Low-cycle Fatigue[J].Earthquake Engineer-ing&Structural Dynamics,1992,21(9):837-848.
[3]TERAN-GILMORE A.Performance-based Earthquake-resistant Design of Framed Buildings Using EnergyConcepts[D].Berkeley:University of California,Berkeley,1996.
[4]YE L P,OTANI S.Maximum Seismic Displacementof Inelastic Systems Based on Energy Concept[J].Earthquake Engineering&Structural Dynamics,1999,28(12):1483-1499.
[5]HORI N,INOUE N.Damaging Properties of GroundMotions and Prediction of Maximum Response ofStructures Based on Momentary Energy Response[J].Earthquake Engineering&Structural Dynamics,2002,31(9):1657-1679.
[6]胡冗冗,王亚勇.地震动瞬时能量与结构最大位移反应关系研究[J].建筑结构学报,2000,21(1):71-76.HU Rong-rong,WANG Ya-yong.A Study on Rela-tion of Instantaneous Energy of Earthquake StrongMotion and Maximum Displacement Response ofStructures[J].Journal of Building Structures,2000,21(1):71-76.
[7]胡冗冗,王亚勇.基于瞬时输入能量的SDOF弹塑性结构最大位移反应分析[J].世界地震工程,2002,18(4):155-158.HU Rong-rong,WANG Ya-yong.Maximum SeismicDisplacement of Inelastic SDOF Structure Based onMomentary Input Energy[J].World Earthquake En-gineering,2002,18(4):155-158.
[8]肖明葵,白绍良,赖明,等.基于滞回耗能的抗震结构最大位移反应[J].重庆大学学报,2003,26(3):133-137.XIAO Ming-kui,BAI Shao-liang,LAI Ming,et al.Maximum Displacement Estimation of Seismic Struc-tures Based on Hysteresis Energy[J].Journal ofChongqing University,2003,26(3):133-137.
[9]江辉,朱晞.近断层地震动考虑能量损伤效应的非弹性强度需求[J].中国安全科学学报,2005,15(5):8-12.JIANG Hui,ZHU Xi.Inelastic Strength Demand ofNear-fault Ground Motions Considering Energy Dam-age Effect[J].China Safety Journal,2005,15(5):8-12.
[10]江辉.近场地震下桥梁结构基于性能抗震设计的能量方法[D].北京:北京交通大学,2007.JIANG Hui.Performance-based Seismic Design ofBridge Structure Excited by Near-fault EarthquakeUsing Energy Concept[D].Beijing:Beijing JiaotongUniversity,2007.
[11]HINDI R A,SEXSMITH R G.Inelastic DamageAnalysis of Reinforced Concrete Bridge ColumnsBased on Degraded Monotonic Energy[J].Journal ofBridge Engineering,2004,9(4):326-332.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心