橡胶混凝土整体道床减振性能分析
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摘要
城市轨道交通的减振设计中,除常用的降低刚度外,还可以通过增加阻尼耗散能量的方法进行吸振处理,但相关研究较少。本文提出一种新型的低成本减振措施——橡胶混凝土基础隔振轨道,通过耗散振动能量达到减振目的。采用三维动力有限元模型,施加模拟振动荷载,分析了马蹄形隧道及盾构隧道中,橡胶混凝土整体道床的动力特性及减振效果。研究结果表明:对于同一种隧道结构,两种道床型式下各拾振点的1/3倍频程频谱变化规律基本一致;橡胶混凝土整体道床系统的加速度级均小于普通整体道床系统的加速度级,20Hz以下频段的减振效果更加明显,这对于轨道交通低频振动控制具有十分重要的意义。
Theoretically speaking,there are two different directions to reduce the vibration induced by the railway transit system. One way is to isolate the vibration by getting lower nature frequency,which was common used in the vibration isolation measures design,while the other is to absorb the vibration by raising the damping,which is rarely researched so far. Based on the principle of energy absorption,the Rubber Concrete Monolithic Roadbed( RCMR) was presented in this paper as a low-cost mitigation measure. The three-dimensional dynamic-finite-element model was employed to analyze the dynamic property subjected to the vibration load of the RCMR in both horseshoe-shaped tunnel and shield tunnel. Calculation results indicated that( 1) for the case of the RCMR and the normal concrete material roadbed in the same tunnel structural,the one-third-octave frequency spectrums on the tunnel wall and ground surface were basically the same.( 2) the vibration acceleration level of the RCMR was effectively damped,especially in the range of 0 ~ 20 Hz,which play an important role in contributing to the vibration mitigation for the railway transit system in low frequency range.
Theoretically speaking,there are two different directions to reduce the vibration induced by the railway transit system. One way is to isolate the vibration by getting lower nature frequency,which was common used in the vibration isolation measures design,while the other is to absorb the vibration by raising the damping,which is rarely researched so far. Based on the principle of energy absorption,the Rubber Concrete Monolithic Roadbed( RCMR) was presented in this paper as a low-cost mitigation measure. The three-dimensional dynamic-finite-element model was employed to analyze the dynamic property subjected to the vibration load of the RCMR in both horseshoe-shaped tunnel and shield tunnel. Calculation results indicated that( 1) for the case of the RCMR and the normal concrete material roadbed in the same tunnel structural,the one-third-octave frequency spectrums on the tunnel wall and ground surface were basically the same.( 2) the vibration acceleration level of the RCMR was effectively damped,especially in the range of 0 ~ 20 Hz,which play an important role in contributing to the vibration mitigation for the railway transit system in low frequency range.
引文
[1]孙晓静.地铁列车振动对环境影响的预测研究及减振措施分析[D].北京:北京交通大学,2008(Sun Xiaojing.Prediction of environment vibrations induced by metro trains and mitigation measures analysis[D].Beijing:Beijing Jiaotong University,2008(in Chinese))
[2]刘维宁,任静,刘卫丰,等.北京地铁钢轨波磨测试分析[J].都市快轨交通,2011,24(3):6-9(Liu Weining,Ren Jing,Liu Weifeng,et al.In-situ tests and analysis on rail corrugation of Beijing metro[J].Urban Rapid Rail Transit,2011,24(3):6-9(in Chinese))
[3]张厚贵,刘维宁,吴宗臻,等.地铁剪切型减振器扣件地段钢轨波磨成因与治理措施[J].中国铁道科学,2014,35(4):22-28(Zhang Hougui,Liu Weining,Wu Zongzhen,et al.Cause and treatment for rail corrugation developed on Egg fastening system section of metro line[J].China Railway Science,2014,35(4):22-28(in Chinese))
[4]孙晓静,张厚贵,刘维宁,等.轨道系统钢轨振动衰减率动力测试研究[J].铁道工程学报,2015,(7):34-39(Sun Xiaojing,Zhang Hougui,Liu Weining,et al.Measurement for characterizing the dynamic damping behavior of track structure[J].Journal of Railway Engineering Society,2015(7):34-39(in Chinese))
[5]Eldin N N,Senouci A M B.Rubber tire particles as concrete aggregate[J].Journal of Materials in Civil Engineering,1993,5(4):478-496
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[7]Siddique R,Naik T R.Properties of concrete containing scrap-tire rubber-an overview[J].Waste Management,2004,24(6):563-569
[8]袁勇,郑磊.橡胶混凝土动力性能实验研究[J].同济大学学报,2008,36(9):1186-1190(Yuan Yong,Zheng Lei.Experimental study on dynamic properties of rubberized concrete[J].Journal of Tongji University(Natural Science),2008,36(9):1186-1190(in Chinese))
[9]陈振富,柯国军,胡绍全,等.橡胶混凝土小变形阻尼研究[J].噪声与振动控制,2004,24(3):32-34(Chen Zhenfu,Ke Guojun,Hu Shaoquan,et al.Study on damping of rubber powder concrete in small deformation[J].Noise and Vibration Control,2004,24(3):32-34(in Chinese))
[10]杨若冲,谈至明,施钟毅,等.橡胶混凝土物理力学性能研究[J].交通运输工程与信息学报,2011,9(4):34-39(Yang Ruochong,Tan Zhiming,Shi Zhongyi,et al.Study on the physical and mechanical performance of rubber concrete[J].Journal of Transportation Engineering and Information,2011,9(4):34-39(in Chinese))
[11]朱涵.新型弹性混凝土的研究综述[J].天津建设科技,2004,14(2):35-37
[12]刘更.结构动力学程序设计[M].北京:国防工业出版社,1993
[13]地铁线路振动调查与分析[R].北京:北京市地下铁道设计研究所,1998
[14]马龙祥.基于无限-周期结构理论的车轨耦合及隧道-地层振动响应分析模型研究[D].北京:北京交通大学,2014(Ma Longxiang.Study on the model of coupled vehicle&track and the analysis model for tunnel-ground vibration response based on the periodic-infinite structure theory[D].Beijing:Beijing Jiaotong University,2014(in Chinese))
[2]刘维宁,任静,刘卫丰,等.北京地铁钢轨波磨测试分析[J].都市快轨交通,2011,24(3):6-9(Liu Weining,Ren Jing,Liu Weifeng,et al.In-situ tests and analysis on rail corrugation of Beijing metro[J].Urban Rapid Rail Transit,2011,24(3):6-9(in Chinese))
[3]张厚贵,刘维宁,吴宗臻,等.地铁剪切型减振器扣件地段钢轨波磨成因与治理措施[J].中国铁道科学,2014,35(4):22-28(Zhang Hougui,Liu Weining,Wu Zongzhen,et al.Cause and treatment for rail corrugation developed on Egg fastening system section of metro line[J].China Railway Science,2014,35(4):22-28(in Chinese))
[4]孙晓静,张厚贵,刘维宁,等.轨道系统钢轨振动衰减率动力测试研究[J].铁道工程学报,2015,(7):34-39(Sun Xiaojing,Zhang Hougui,Liu Weining,et al.Measurement for characterizing the dynamic damping behavior of track structure[J].Journal of Railway Engineering Society,2015(7):34-39(in Chinese))
[5]Eldin N N,Senouci A M B.Rubber tire particles as concrete aggregate[J].Journal of Materials in Civil Engineering,1993,5(4):478-496
[6]刘春生,朱涵,李志国.橡胶集料混凝土抗压细观数值模拟[J].低温建筑技术,2006(2):1-3(Liu Chunsheng,Zhu Han,Li Zhiguo.Numerical simulation on compression behavior of crumb rubber concrete[J].Low Temperature Architecture Technology,2006(2):1-3(in Chinese))
[7]Siddique R,Naik T R.Properties of concrete containing scrap-tire rubber-an overview[J].Waste Management,2004,24(6):563-569
[8]袁勇,郑磊.橡胶混凝土动力性能实验研究[J].同济大学学报,2008,36(9):1186-1190(Yuan Yong,Zheng Lei.Experimental study on dynamic properties of rubberized concrete[J].Journal of Tongji University(Natural Science),2008,36(9):1186-1190(in Chinese))
[9]陈振富,柯国军,胡绍全,等.橡胶混凝土小变形阻尼研究[J].噪声与振动控制,2004,24(3):32-34(Chen Zhenfu,Ke Guojun,Hu Shaoquan,et al.Study on damping of rubber powder concrete in small deformation[J].Noise and Vibration Control,2004,24(3):32-34(in Chinese))
[10]杨若冲,谈至明,施钟毅,等.橡胶混凝土物理力学性能研究[J].交通运输工程与信息学报,2011,9(4):34-39(Yang Ruochong,Tan Zhiming,Shi Zhongyi,et al.Study on the physical and mechanical performance of rubber concrete[J].Journal of Transportation Engineering and Information,2011,9(4):34-39(in Chinese))
[11]朱涵.新型弹性混凝土的研究综述[J].天津建设科技,2004,14(2):35-37
[12]刘更.结构动力学程序设计[M].北京:国防工业出版社,1993
[13]地铁线路振动调查与分析[R].北京:北京市地下铁道设计研究所,1998
[14]马龙祥.基于无限-周期结构理论的车轨耦合及隧道-地层振动响应分析模型研究[D].北京:北京交通大学,2014(Ma Longxiang.Study on the model of coupled vehicle&track and the analysis model for tunnel-ground vibration response based on the periodic-infinite structure theory[D].Beijing:Beijing Jiaotong University,2014(in Chinese))