基于应变和比能双控的钢结构损伤模型
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摘要
损伤模型是对经历地震后结构的剩余承载力进行定量评价的重要工具。提出了一个基于等效塑性应变和比能双控的损伤模型,从材料的角度出发,考虑了三轴应力对地震作用下结构性能的影响,可用于空间结构强震作用下的非线性分析。应用该模型对一个九层的benchmark结构进行了地震倒塌模拟分析,结果显示基于应变与比能双控的损伤模型能够很好地评估强震下钢结构竖向构件及层的损伤发展过程。
Damage model is an important tool to evaluate quantitatively residual strength of a structure after earthquakes.From view point of material,a damage model based on equivalent plastic strain and energy ratio was proposed here,considering structural behavior under triaxial stress,and it could be used to do the nonlinear analysis of 3-D structures under earthquakes.A nine-story benchmark model structure was built and the damage model was used to evaluate the collapse process of steel frame quantitatively,the results indicated that this damage model can evaluate the damage process of vertical members and floors of a steel structure effectively.
Damage model is an important tool to evaluate quantitatively residual strength of a structure after earthquakes.From view point of material,a damage model based on equivalent plastic strain and energy ratio was proposed here,considering structural behavior under triaxial stress,and it could be used to do the nonlinear analysis of 3-D structures under earthquakes.A nine-story benchmark model structure was built and the damage model was used to evaluate the collapse process of steel frame quantitatively,the results indicated that this damage model can evaluate the damage process of vertical members and floors of a steel structure effectively.
引文
[1]李宏男,肖诗云,霍林生.汶川地震震害调查与启示[J].建筑结构学报,2008,29(4):10-19.
[2]张永鑫,凌煜,张熠.双参数地震损伤模型综述[J].山西:山西建筑,2009,35(27):64-65.
[3]董宝,沈祖炎.空间钢构件考虑累积损伤累积效应的恢复力模型及试验验证[J].上海力学,1999,20(4):341-347.
[4]李翌新,赵世春.钢筋混凝土及劲性钢筋混凝土构件的累积损伤模型[J].四川:西南交通大学学报,1994,29(4):412-417.
[5]Park Y J,Ang A.Mechanistic seismic damage model forreinforced concrete[J].Journal of Structural Engineering,ASCE,1985,111(4):740-756.
[6]欧进萍,牛获涛,王光远.多层非线性抗震钢结构的模糊动力可靠性分析与设计[J].地震工程与工程震动,1990,10(4):27-37.
[7]牛狄涛,任利杰.改进的钢筋混凝土结构双参数地震破坏模型[J].地震工程与工程振动,1996,16(4):44-54.
[8]傅剑平,王敏,白绍良.对用于钢筋混凝土结构的Park-Ang双参数破坏准则的识别和修正[J].地震工程与工程振动,2005,25(5):73-79.
[9]韦未,李同春.一种新的用于各向同性损伤模型的四参数等效应变[J].工程力学,2005,22(6):91-96.
[10]韦未,李同春,姚纬明.建立在应变空间上的混凝土四参数破坏准则[J].水利水电科技进展,2004,24(5):27-29.
[11]Shen Z Y,Dong B.An experiment-based cumulative damagemechanics model of steel under cyclic loading[J].Advancein Structural Engineering,1997,1(1):39-46.
[12]宋振森.超高层钢结构考虑损伤和损伤累积的分析方法[D].上海:同济大学,2003.
[13]Ju J W.Strain-and stress-based continum damage models-I:formulation[J].International Journal of Solids andStructures.1987,23(7):821-840.
[14]Simo J C,Ju,J W.Strain-and stress-based continum damagemodels-II:computational aspects[J].International Journal ofSolids and Structures.1987,23(7):841-869.
[15]陈树勋,王光远.工程结构与系统抗震优化设计的实用方法[M].北京:中国建筑工业出版社,1999.
[16]刘海卿,陈小波,王学庆.应用损伤指数的框架结构倒塌数值模拟分析[J].自然灾害学报,2008,17(5):21-25.
[17]姚谦峰,苏三庆.地震工程[M].陕西:陕西科学技术出版社,2001.
[18]Ohtori Y,Spencer Jr B F,Dyke S J.Benchmark controlproblems for seismically excited nonlinear buildings[J].Journal of Engineering Mechanics,ASCE,2004,130(4):366-385.
[19]LS-DYNA.Keyword user s manual[M].Livermore,Califor-nia:Livermore Software Technology Corporation,2006.
[2]张永鑫,凌煜,张熠.双参数地震损伤模型综述[J].山西:山西建筑,2009,35(27):64-65.
[3]董宝,沈祖炎.空间钢构件考虑累积损伤累积效应的恢复力模型及试验验证[J].上海力学,1999,20(4):341-347.
[4]李翌新,赵世春.钢筋混凝土及劲性钢筋混凝土构件的累积损伤模型[J].四川:西南交通大学学报,1994,29(4):412-417.
[5]Park Y J,Ang A.Mechanistic seismic damage model forreinforced concrete[J].Journal of Structural Engineering,ASCE,1985,111(4):740-756.
[6]欧进萍,牛获涛,王光远.多层非线性抗震钢结构的模糊动力可靠性分析与设计[J].地震工程与工程震动,1990,10(4):27-37.
[7]牛狄涛,任利杰.改进的钢筋混凝土结构双参数地震破坏模型[J].地震工程与工程振动,1996,16(4):44-54.
[8]傅剑平,王敏,白绍良.对用于钢筋混凝土结构的Park-Ang双参数破坏准则的识别和修正[J].地震工程与工程振动,2005,25(5):73-79.
[9]韦未,李同春.一种新的用于各向同性损伤模型的四参数等效应变[J].工程力学,2005,22(6):91-96.
[10]韦未,李同春,姚纬明.建立在应变空间上的混凝土四参数破坏准则[J].水利水电科技进展,2004,24(5):27-29.
[11]Shen Z Y,Dong B.An experiment-based cumulative damagemechanics model of steel under cyclic loading[J].Advancein Structural Engineering,1997,1(1):39-46.
[12]宋振森.超高层钢结构考虑损伤和损伤累积的分析方法[D].上海:同济大学,2003.
[13]Ju J W.Strain-and stress-based continum damage models-I:formulation[J].International Journal of Solids andStructures.1987,23(7):821-840.
[14]Simo J C,Ju,J W.Strain-and stress-based continum damagemodels-II:computational aspects[J].International Journal ofSolids and Structures.1987,23(7):841-869.
[15]陈树勋,王光远.工程结构与系统抗震优化设计的实用方法[M].北京:中国建筑工业出版社,1999.
[16]刘海卿,陈小波,王学庆.应用损伤指数的框架结构倒塌数值模拟分析[J].自然灾害学报,2008,17(5):21-25.
[17]姚谦峰,苏三庆.地震工程[M].陕西:陕西科学技术出版社,2001.
[18]Ohtori Y,Spencer Jr B F,Dyke S J.Benchmark controlproblems for seismically excited nonlinear buildings[J].Journal of Engineering Mechanics,ASCE,2004,130(4):366-385.
[19]LS-DYNA.Keyword user s manual[M].Livermore,Califor-nia:Livermore Software Technology Corporation,2006.
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