地震模拟模型实验中RC结构非线性性态模拟研究
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摘要
在小比例尺钢筋混凝土结构模型地震模拟实验中,模型与原型间材料力学性能完全相似很难满足,致使难以正确模拟原型结构的非线性性态。依据普通混凝土和微粒混凝土力学性能实验,从动态相似的观点出发,建立原型与模型的等效动态相似关系,据此可在地震模拟模型实验中对原型结构的非线性性态进行动态模拟。通过地震模拟实验的数值模拟及反应偏差分析,验证此动态模拟实验方法的有效性。此外,小比例尺钢筋混凝土结构模型设计中通过调整配筋率、配箍率或者截面有效高度、箍筋间距等,对微粒混凝土和配筋的相似性协调进行考虑。通过简单的构件试验验证这种模型设计方法的有效性。这样,小比例尺钢筋混凝土模型将能很好地模拟原型结构的非线性性态。
For small-scale RC structure model in earthquake simulation test,the material behavior between prototype and model makes the model difficult to simulate correctly the nonlinear performance of prototype.On the basis of the dynamic similitude of mechanical behavior between common concrete and micro-concrete,which is derived from the mechanical behavior tests,the simplified equivalent dynamic similitude relations,which are applicable to the nonlinear performance simulation with small-scale RC structures models in the earthquake similitude tests,are set up.By the numerical simulation of earthquake simulation tests and the deviation analyses,the experimental dynamic simulation method is verified.In addition,for small-scaled RC model,to consider the similitude harmony of concrete used in model and reinforcement used in model,by adjusting reinforcement,and stirrup,or the effective section height(h0) and hoop space etc.,simple experiments are carried out to verify this model design method.Thus,the small-scaled RC model can simulate correctly the nonlinear performance of prototype.
For small-scale RC structure model in earthquake simulation test,the material behavior between prototype and model makes the model difficult to simulate correctly the nonlinear performance of prototype.On the basis of the dynamic similitude of mechanical behavior between common concrete and micro-concrete,which is derived from the mechanical behavior tests,the simplified equivalent dynamic similitude relations,which are applicable to the nonlinear performance simulation with small-scale RC structures models in the earthquake similitude tests,are set up.By the numerical simulation of earthquake simulation tests and the deviation analyses,the experimental dynamic simulation method is verified.In addition,for small-scaled RC model,to consider the similitude harmony of concrete used in model and reinforcement used in model,by adjusting reinforcement,and stirrup,or the effective section height(h0) and hoop space etc.,simple experiments are carried out to verify this model design method.Thus,the small-scaled RC model can simulate correctly the nonlinear performance of prototype.
引文
[1]张敏政.地震模拟实验中相似律应用的若干问题[J].地震工程与工程振动,1997,17(2):52-58.
[2]中国地震局“九五”重点项目子专题总结报告(95-05-02-01-03)[R].房屋抗震能力实测和试验技术研究.
[3]刘晓明.地震模拟振动台模型实验的若干偏差分析[D].哈尔滨:中国地震局工程力学研究所,1998.
[4]孟庆利.地震模拟振动台实验中钢筋混凝土结构非线性性态的动态模拟[D].哈尔滨:中国地震局工程力学研究所,2001.
[5]GB 50010-2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[6]Helmut Krawinkler.Dynamic modeling of concrete structures[M].Harry G.Harris Editor ACI Publication.1982.
[7]Sedow L I.Similarity dimensional methods in mechanics[M].Russian Academy of Sciences,Moscow,Russia,1980.
[8]Sabins G M,Harris HG.Structural modeling and experimental techniques[M].Prentice Hall,Englewond Cliffs.NJ,1983.
[2]中国地震局“九五”重点项目子专题总结报告(95-05-02-01-03)[R].房屋抗震能力实测和试验技术研究.
[3]刘晓明.地震模拟振动台模型实验的若干偏差分析[D].哈尔滨:中国地震局工程力学研究所,1998.
[4]孟庆利.地震模拟振动台实验中钢筋混凝土结构非线性性态的动态模拟[D].哈尔滨:中国地震局工程力学研究所,2001.
[5]GB 50010-2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.
[6]Helmut Krawinkler.Dynamic modeling of concrete structures[M].Harry G.Harris Editor ACI Publication.1982.
[7]Sedow L I.Similarity dimensional methods in mechanics[M].Russian Academy of Sciences,Moscow,Russia,1980.
[8]Sabins G M,Harris HG.Structural modeling and experimental techniques[M].Prentice Hall,Englewond Cliffs.NJ,1983.
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