钢筋混凝土框架柱损伤模型对比分析
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摘要
随着基于性能抗震设计理论的发展,损伤模型在建立性态目标量化准则方面受到重视。本文对6根不同轴压比的钢筋混凝土框架柱进行低周反复试验,计算了各构件分别采用基于刚度的破损指标和基于位移及耗能的破损指标,并与试验现象进行了对比。分析结果表明,基于位移及耗能的改进Park-Ang模型能较好的反映框架柱各破坏阶段的损伤程度,而基于刚度变化模型能较好的反映框架柱不同位移幅值下的损伤程度,但对后期破坏定义太笼统。
With the development of performance-based seismic design theory,the damage model of seismic behavior gained attention at the establishment of quantitative criteria for performance-based seismic design.In this paper,the static low-cycle tests of six reinforced concrete frame columns with different axial compression ratios were conducted.The damage indices of each component based on stiffness and based on displacement and energy for the columns were calculated,and were compared with the experimental phenomena.The results shows the extent of the damage of the columns in different phase can be expressed by the improved Park-Ang model based on displacement and energy.The damage model based on stiffness can reflect the extent of damage under different displacement amplitude,but the definition of the later damage is very ambiguous.
With the development of performance-based seismic design theory,the damage model of seismic behavior gained attention at the establishment of quantitative criteria for performance-based seismic design.In this paper,the static low-cycle tests of six reinforced concrete frame columns with different axial compression ratios were conducted.The damage indices of each component based on stiffness and based on displacement and energy for the columns were calculated,and were compared with the experimental phenomena.The results shows the extent of the damage of the columns in different phase can be expressed by the improved Park-Ang model based on displacement and energy.The damage model based on stiffness can reflect the extent of damage under different displacement amplitude,but the definition of the later damage is very ambiguous.
引文
[1]Park Y J,Ang H S.Seismic damage analysis of reinforcedconcrete buildings[J].Journal of Structural Engineering,ASCE,1985,111(4):722~739
[2]Kunnath S K,Reinhorn A M and Park Y J.AnalyticalModeling of Inelastic Seismic Response of R—C Structures[J].Journal of Structural Engineering,1990,116(4):996~1017
[3]王东升,司炳君,艾庆华,孙治国.改进的Park-Ang地震损伤模型及其比较[J].工程抗震与加固改造,2005,27(6):38~44Wang Dong-sheng,Si Bing-jun,Ai Qing-hua,Sun Zhi-guo.AComparative Study of Modified Park Ang Model and ParkAng Model for Structural SeismicDamage Evaluation[J].Earthquake Resistant Engineering and Retrofitting,2005,27(6):38~44(in Chinese)
[4]郭子雄,刘阳,杨勇.结构震害指数研究评述[J].地震工程与工程振动,2004,24(5):56~61Guo Zi-xiong,Liu Yang,Yang Yong.State-of-the-art ofseismic damage index of structures[J].EarthquakeEngineering and Engineering Vibration,2004,24(5):56~61(in Chinese)
[5]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):135~140Shen Zu-yan,Dong Bao,Cao Wen-xian.Development andEvaluation of Researches on Damage Cumulation Analysisfor Building Structures[J].Journal of Tongji University,1997,25(2):135~140(in Chinese)
[2]Kunnath S K,Reinhorn A M and Park Y J.AnalyticalModeling of Inelastic Seismic Response of R—C Structures[J].Journal of Structural Engineering,1990,116(4):996~1017
[3]王东升,司炳君,艾庆华,孙治国.改进的Park-Ang地震损伤模型及其比较[J].工程抗震与加固改造,2005,27(6):38~44Wang Dong-sheng,Si Bing-jun,Ai Qing-hua,Sun Zhi-guo.AComparative Study of Modified Park Ang Model and ParkAng Model for Structural SeismicDamage Evaluation[J].Earthquake Resistant Engineering and Retrofitting,2005,27(6):38~44(in Chinese)
[4]郭子雄,刘阳,杨勇.结构震害指数研究评述[J].地震工程与工程振动,2004,24(5):56~61Guo Zi-xiong,Liu Yang,Yang Yong.State-of-the-art ofseismic damage index of structures[J].EarthquakeEngineering and Engineering Vibration,2004,24(5):56~61(in Chinese)
[5]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):135~140Shen Zu-yan,Dong Bao,Cao Wen-xian.Development andEvaluation of Researches on Damage Cumulation Analysisfor Building Structures[J].Journal of Tongji University,1997,25(2):135~140(in Chinese)
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