弹性能损失的地震损伤评价模型
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摘要
针对混凝土结构构件在地震过程中的弹性能损失现象,提出一种与弹性能损失相关的地震损伤评价模型.该模型考虑了混凝土结构构件在地震中的能量转移和刚度退化的影响,多角度地评价混凝土结构构件的损伤情况.对6根HRBF 500钢筋混凝土柱进行低周反复加载试验,考察其在地震中损伤发展的趋势和程度,并对比经典Park模型和所建立的模型的损伤评价情况.结果表明:所建立的模型具有较好的可靠性和合理性,能克服经典Park模型的部分缺陷.
Considering the loss of elastic energy of structural elements during earthquake,a seismic damage model is presented.The energy transfer and stiffness degradation are involved in this new model,so the damage of structure can be evaluated in various aspects.Six HRBF 500 RC columns are tested under low frequency cyclic loading.The trend and level of damage in earthquake are analyzed by Park model and new model.By comparison of the results of two models,it′s shown: the new model is reliable and reasonable and it can overcome some shortcomings of Park model.
Considering the loss of elastic energy of structural elements during earthquake,a seismic damage model is presented.The energy transfer and stiffness degradation are involved in this new model,so the damage of structure can be evaluated in various aspects.Six HRBF 500 RC columns are tested under low frequency cyclic loading.The trend and level of damage in earthquake are analyzed by Park model and new model.By comparison of the results of two models,it′s shown: the new model is reliable and reasonable and it can overcome some shortcomings of Park model.
引文
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[9]杨伟,欧进萍.基于能量原理的Park&Ang损伤模型简化计算方法[J].地震工程与工程振动,2009,29(2):159-165.
[10]刁波,李淑春,叶英华.反复荷载作用下混凝土异形柱结构累积损伤分析及试验研究[J].建筑结构学报,2008,29(1):57-63.
[11]王全凤,刘良林,沈章春.弹性变形能形式的地震损伤评价模型[J].建筑科学与工程学报,2008,25(4):31-35.
[12]黄庆丰,王全凤.弹塑性结构动力系统的时变刚度激励效应分析[J].土木工程学报,2006,39(12):16-22,32.
[13]王全凤,黄庆丰.损伤结构弹塑性抗震性能分析及评价[J].华侨大学学报:自然科学版,2009,30(1):6-11.
[14]郑济坤,王全凤.HRBF 500 RC柱地震全过程损伤试验分析[J].工业建筑,2010,40(12):51-54.
[2]KRAWINKLER H,ZOHREI M.Cumulative damage in steel structures subjected to earthquake ground motions[J].Computers and Structures,1983,16(1/2/3/4):531-541.
[3]POWELL G H,ALLCHABADI R.Scismic damage prediction by deterministic methods[J].Earthquake Engineeringand Structural Dynamics,1988,16(5):719-734.
[4]PARK Y J,ALFREDO H S A.Mechanistic seismic damage model for reinforced concrete[J].J Structural Engineer-ing,1985,111(4):722-739.
[5]陈永祁,龚思礼.结构在地震动时延性和累积塑性耗能的双重破坏准则[J].建筑结构学报,1986,7(1):35-48.
[6]牛荻涛,任利杰.改进的钢筋混凝土结构双参数地震破坏模型[J].地震工程与工程震动,1996,16(4):44-54.
[7]李军旗,赵世春.钢筋混凝土构件损伤模型[J].兰州铁道学院学报,2000,19(3):25-27.
[8]于海洋,武建华,张国彬.一种新型的混凝土结构双参数地震损伤模型[J].重庆建筑大学学报,2004,26(5):43-48.
[9]杨伟,欧进萍.基于能量原理的Park&Ang损伤模型简化计算方法[J].地震工程与工程振动,2009,29(2):159-165.
[10]刁波,李淑春,叶英华.反复荷载作用下混凝土异形柱结构累积损伤分析及试验研究[J].建筑结构学报,2008,29(1):57-63.
[11]王全凤,刘良林,沈章春.弹性变形能形式的地震损伤评价模型[J].建筑科学与工程学报,2008,25(4):31-35.
[12]黄庆丰,王全凤.弹塑性结构动力系统的时变刚度激励效应分析[J].土木工程学报,2006,39(12):16-22,32.
[13]王全凤,黄庆丰.损伤结构弹塑性抗震性能分析及评价[J].华侨大学学报:自然科学版,2009,30(1):6-11.
[14]郑济坤,王全凤.HRBF 500 RC柱地震全过程损伤试验分析[J].工业建筑,2010,40(12):51-54.
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