长输埋地管道振动台试验设计中相似关系的选取
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摘要
针对目前地下结构抗震性能振动台试验中的结构、土相似关系选择问题,以某长输埋地管道为对象,根据结构动力学原理和相似理论,采用量纲分析法重现推导模型试验的动力相似关系对其进行模型设计,对原型和不同相似比的管、土模型进行了研究其抗震性能的数值试验,并分析了不同工况下土体-长输埋地管道系统的地震响应;由模型结果按照相似关系推出原型的动力响应后,与原型数值试验结果进行了比较;进而深入研究了模型与原型的相似关系,提出了长输埋地管道抗震性能振动台模型试验相似关系的建议,为即将开展的长输埋地管道振动台试验奠定了基础。
In view of the similarity relation selection problem of structures and soil in present underground structures shaking table test,taking a long-distance buried pipeline as a research object,according to the structural dynamics theory and the similarity theory,and using dimensional analysis method,we establish the dynamic similarity relation and design the model similitude relations.Then,the seismic performance of some long-distance buried pipeline,including the prototype and different similitude relations of pipe-soil model,is studied with numerical test.We analyze the dynamic effect of different pipe-soil models,and deduce the prototype response by the results of the model according to the similitude relations,and compare with the prototype calculating value,and then study the model and the prototype similarity relation deeply.Finally,the reasonable similarity relations of the shaking table test are proposed,which will be a foundation for the upcoming shaking table test of long-distance buried pipelines.
In view of the similarity relation selection problem of structures and soil in present underground structures shaking table test,taking a long-distance buried pipeline as a research object,according to the structural dynamics theory and the similarity theory,and using dimensional analysis method,we establish the dynamic similarity relation and design the model similitude relations.Then,the seismic performance of some long-distance buried pipeline,including the prototype and different similitude relations of pipe-soil model,is studied with numerical test.We analyze the dynamic effect of different pipe-soil models,and deduce the prototype response by the results of the model according to the similitude relations,and compare with the prototype calculating value,and then study the model and the prototype similarity relation deeply.Finally,the reasonable similarity relations of the shaking table test are proposed,which will be a foundation for the upcoming shaking table test of long-distance buried pipelines.
引文
[1]杨树标,李荣华,刘建平.振动台试验模型和原型相似关系的理论研究[J].河北工程大学学报(自然科学版),2007,24(1):8-11.Yang Sh B,Li R H,Liu J P.Theoretical study onsimilarity relation of vibroplatform test model and orig-inal model[J].Journal of Hebei University of Engi-neering(Natural Science Edition),2007,24(1):8-11.
[2]李德寅,王邦楣,林亚超.结构模型实验[M].北京:科学出版社,1996.Li D Y,Wang B M,Lin Y Ch.Structural Model Ex-periment[M].Beijing:Science Press,1996.
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[4]杨旭东.振动台模型试验若干问题的研究[D].北京:中国建筑科学研究院,2005.Yang X D.The studying of some problems in shakingtable model test[D].Beijing:China Academy of Build-ing Research,2005.
[5]周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法[J].结构工程师,2003,(3):30-38.Zhou Y,Lu W Sh,Lv X L.Practical model designmethod of shaking table tests[J].Structural Engi-neers,2003,(3):30-38.
[6]王苏,路德春,杜修力.地下结构地震破坏静-动力耦合模拟研究[J].岩土力学,2012,33(11):3483-3488.Wang S,Lu D Ch,Du X L.Research on undergroundstructure seismic damage using static-dynamic couplingsimulation method[J].Rock and Soil Mechanics,2012,33(1):3483-3488.
[2]李德寅,王邦楣,林亚超.结构模型实验[M].北京:科学出版社,1996.Li D Y,Wang B M,Lin Y Ch.Structural Model Ex-periment[M].Beijing:Science Press,1996.
[3]张敏政.地震模拟实验中的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.Zhang M Zh.Study on similitude laws for shaking ta-ble tests[J].Earthquake Engineering and EngineeringVibration,1997,17(2):52-58.
[4]杨旭东.振动台模型试验若干问题的研究[D].北京:中国建筑科学研究院,2005.Yang X D.The studying of some problems in shakingtable model test[D].Beijing:China Academy of Build-ing Research,2005.
[5]周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法[J].结构工程师,2003,(3):30-38.Zhou Y,Lu W Sh,Lv X L.Practical model designmethod of shaking table tests[J].Structural Engi-neers,2003,(3):30-38.
[6]王苏,路德春,杜修力.地下结构地震破坏静-动力耦合模拟研究[J].岩土力学,2012,33(11):3483-3488.Wang S,Lu D Ch,Du X L.Research on undergroundstructure seismic damage using static-dynamic couplingsimulation method[J].Rock and Soil Mechanics,2012,33(1):3483-3488.
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