隧道振动台模型试验的相似关系
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摘要
以嘎隆拉隧道振动台模型试验为例,在模型试验相似理论的基础上对隧道振动台试验相似关系进行了研究;用方程分析法和量纲分析法推导了模型试验相似准则,实现了模型试验几何条件、边界条件、荷载及材料的相似,将其应用于隧道振动台动力模型试验;建立了有限元模型,从加速度时程曲线、频谱特性、加速度放大系数、破坏现象等方面与试验进行了对比。结果表明,试验结果与计算结果比较相符,破坏现象和破坏部位基本相似,说明本次相似关系的拟定是合理的。
Taking Galongla tunnel shaking table model test as an example,similarity relation was studied on the basis of similarity theory.The model test similarity criterion was deduced through equation analysis and dimensional analysis.The similarity of geometric conditions,boundary conditions,loads and materials was simulated in the table test.Finite element model was established and comparison was made from the perspective of the curve of acceleration time,spectrum feature,coefficient of acceleration and failure.The results of the tests coincided highly with calculation results;the failure phenomena and location also agreed well,which indicated that the simulation relation was reasonable for the model.
Taking Galongla tunnel shaking table model test as an example,similarity relation was studied on the basis of similarity theory.The model test similarity criterion was deduced through equation analysis and dimensional analysis.The similarity of geometric conditions,boundary conditions,loads and materials was simulated in the table test.Finite element model was established and comparison was made from the perspective of the curve of acceleration time,spectrum feature,coefficient of acceleration and failure.The results of the tests coincided highly with calculation results;the failure phenomena and location also agreed well,which indicated that the simulation relation was reasonable for the model.
引文
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[2]沈德建,吕西林.地震模拟振动台及模型试验研究进展[J].结构工程师,2006,22(6):55-58.
[3]刘吉.黄草坪2#隧道地震动力相应的物理模拟试验初步研究[D].成都:成都理工大学,2007.
[4]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.
[5]来弘鹏,谢永利,杨晓华.公路隧道衬砌断面型式模型试验研究[J].岩土工程学报,2006,28(63):740-744.
[6]李勇,朱维申,王汉鹏,等.新型岩土相似材料的力学试验研究及应用[J].隧道建设,2006(9):197-200.
[7]曹忠权,尤惠川.扎墨公路嘎隆拉隧道工程场地地震安全性评价报告[R].拉萨:西藏自治区地震局地震工程研究所,2008:154-164.
[8]王秀英,刘维宁,张弥.地下结构震害类型及机理研究[J].中国安全科学学报,2003,13(11):55-58
[9]杨树标,李荣华,刘建平,等.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,2007,24(1):8-11.
[10]迟世春,林少书.结构动力模型试验相似理论及其验证[J].世界地震工程,2004,20(4):11-12.
[11]张兴来,钟云健.公路隧道衬砌换拱技术探讨[J].重庆交通大学学报:自然科学版,2008,27(增):910-916.
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