基于能量耗储能力的结构地震损伤量化研究
|
摘要
结构震害可分为位移首超破坏与累积损伤破坏两种模式,其根源均是某一瞬时段内结构能量耗储能力与地震耗储需求不匹配所造成的。基于对结构震害的这一认识,将结构地震损伤定义为结构在单向水平荷载作用下耗散塑性应变能与存储弹性应变能能力的损失,并构建结构地震损伤量化模型。该模型能清晰描述结构的两种破坏模式,并对"位移损伤"与"退化损伤"进行分离,物理意义明确,应用相对简单。采用56条地震波对3种周期的SDOF结构进行损伤分析,发现控制结构在地震作用下的峰值位移能够控制结构的总损伤,这当中既包括控制结构的"位移损伤",也包括控制结构的"退化损伤";而减小结构由于振动平衡位置偏离而产生的不可恢复位移与降低结构的强度衰减是控制结构损伤最为有效的2个途径。
The common reason of first excursion failure and cumulative damage failure is that seismic energy dissipation and storage demand are greater than the capability of structure in a momentary input interval.As a result,seismic damage is defined as the loss of structural energy dissipation and storage capability under one-way horizontal loads,and a seismic damage quantitative model which can separate "displacement damage" and "degradation damage" is proposed.Based on the model,the seismic damage analysis of three SDOF structures with different periods by 56 ground motions are carried out.The results show that the peak displacement is strongly related to structural total damage,which includes "displacement damage" and "degradation damage".The decrease of the residual displacement caused by the deviation of a vibration balance position and reduced structural strength degradation will control seismic damage effectively.
The common reason of first excursion failure and cumulative damage failure is that seismic energy dissipation and storage demand are greater than the capability of structure in a momentary input interval.As a result,seismic damage is defined as the loss of structural energy dissipation and storage capability under one-way horizontal loads,and a seismic damage quantitative model which can separate "displacement damage" and "degradation damage" is proposed.Based on the model,the seismic damage analysis of three SDOF structures with different periods by 56 ground motions are carried out.The results show that the peak displacement is strongly related to structural total damage,which includes "displacement damage" and "degradation damage".The decrease of the residual displacement caused by the deviation of a vibration balance position and reduced structural strength degradation will control seismic damage effectively.
引文
[1]李刚,程耿东.基于性能的结构抗震设计——理论、方法与应用[M].北京:科学出版社,2004:1―3.Li Gang,Chen Gengdong.Performance-based seismicdesign of structures——theory,method and application[M].Beijing:Science Press,2004:1―3.(in Chinese)
[2]吕西林,章红梅.对《建筑工程抗震性态设计通则(试用)》的评述[J].地震工程与工程振动,2005,25(4):180―186.LüXilin,Zhang Hongmei.Comments on general rule forperformance-based seismic design of buildings[J].Earthquake Engineering and Engineering Vibration,2005,25(4):180―186.(in Chinese)
[3]Park Y J,Ang A H S.Mechanistic seismic damageanalysis of reinforced concrete[J].Journal of StructuralEngineering(ASCE),1985,111:722―739.
[4]Sucuoglu H,Erberik A.Energy-based hysteresis anddamage models for deteriorating systems throughlow-cycle fatigue[J].Earthquake Engineering&Structural Dynamics,2004,33:69―88.
[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,2002,31:1657―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 Rongrong,Wang Yayong.A study on relation ofinstantaneous energy of earthquake strong motion andmaximum displacement response of structures[J].Journal of Civil Engineering,2000,21(1):71―76.(inChinese)
[7]曹晖,林学鹏.地震动非平稳特性对结构非线性响应影响的分析[J].工程力学,2006,23(12):30―35.Cao Hui,Lin Xuepeng.The effect of nonstationarycharacteristic of earthquake ground motion on thestructural nonlinear responses[J].EngineeringMechanics,2006,23(12):30―35.(in Chinese)
[8]Mehanny S S F,Deierlein G G.Seismic damage andcollapse assessment of composite moment frames[J].Journal of structural Engineering(ASCE),2001,127:1045―1053.
[9]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003:6―12.Zhang Xinpei.Nonlinear analysis of reinforced concreteseismic structures[M].Beijing:Science Press,2003:6―12.(in Chinese)
[10]陈逵,刘哲锋,沈蒲生.延性系数对SDOF体系地震能量输入历程的影响研究[J].地震工程与工程振动,2010,30(6):56―64.Chen Kui,Liu Zhefeng,Shen Pusheng.Study on theeffect of ductility coefficient on input energy timehistories for inelastic SDOF systems[J].EarthquakeEngineering and Engineering Vibration,2010,30(6):56―64.(in Chinese)
[11]叶列平,马千里,缪志伟.结构抗震分析用地震动强度指标的研究[J].地震工程与工程振动,2009,29(4):9―22.Ye Lieping,Ma Qinli,Miu Zhiwei.Study on earthquakeintensities for seismic analysis of structures[J].Earthquake Engineering and Engineering Vibration,2009,29(4):9―22.(in Chinese)
[2]吕西林,章红梅.对《建筑工程抗震性态设计通则(试用)》的评述[J].地震工程与工程振动,2005,25(4):180―186.LüXilin,Zhang Hongmei.Comments on general rule forperformance-based seismic design of buildings[J].Earthquake Engineering and Engineering Vibration,2005,25(4):180―186.(in Chinese)
[3]Park Y J,Ang A H S.Mechanistic seismic damageanalysis of reinforced concrete[J].Journal of StructuralEngineering(ASCE),1985,111:722―739.
[4]Sucuoglu H,Erberik A.Energy-based hysteresis anddamage models for deteriorating systems throughlow-cycle fatigue[J].Earthquake Engineering&Structural Dynamics,2004,33:69―88.
[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,2002,31:1657―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 Rongrong,Wang Yayong.A study on relation ofinstantaneous energy of earthquake strong motion andmaximum displacement response of structures[J].Journal of Civil Engineering,2000,21(1):71―76.(inChinese)
[7]曹晖,林学鹏.地震动非平稳特性对结构非线性响应影响的分析[J].工程力学,2006,23(12):30―35.Cao Hui,Lin Xuepeng.The effect of nonstationarycharacteristic of earthquake ground motion on thestructural nonlinear responses[J].EngineeringMechanics,2006,23(12):30―35.(in Chinese)
[8]Mehanny S S F,Deierlein G G.Seismic damage andcollapse assessment of composite moment frames[J].Journal of structural Engineering(ASCE),2001,127:1045―1053.
[9]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003:6―12.Zhang Xinpei.Nonlinear analysis of reinforced concreteseismic structures[M].Beijing:Science Press,2003:6―12.(in Chinese)
[10]陈逵,刘哲锋,沈蒲生.延性系数对SDOF体系地震能量输入历程的影响研究[J].地震工程与工程振动,2010,30(6):56―64.Chen Kui,Liu Zhefeng,Shen Pusheng.Study on theeffect of ductility coefficient on input energy timehistories for inelastic SDOF systems[J].EarthquakeEngineering and Engineering Vibration,2010,30(6):56―64.(in Chinese)
[11]叶列平,马千里,缪志伟.结构抗震分析用地震动强度指标的研究[J].地震工程与工程振动,2009,29(4):9―22.Ye Lieping,Ma Qinli,Miu Zhiwei.Study on earthquakeintensities for seismic analysis of structures[J].Earthquake Engineering and Engineering Vibration,2009,29(4):9―22.(in Chinese)
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