|
|
|
| Experimental study on dynamic properties of soilbag reinforced rubber
sand mixture |
| LIU Fangcheng,TIAN Wenhui,ZHENG hui,BU Guobin,BIN Jia |
| (College of Civil Engineering,Hunan University of Technology,Zhuzhou,Hunan 412007,China) |
|
|
|
|
Abstract Rubber sand mixture(RSM) can be used as a cheap energy dissipation material. Reinforcing RSM with soilbags can improve its strength and stability as a base isolator beneath the foundation of structures cushion. A large cyclic shear test device was used to study the hysteresis characteristics of soilbag reinforced rubber sand mixture(SBRSM) under cyclic shear load,and the effects of the main factors such as the mass content of the rubber particles,the vertical pressure,the strain amplitude,the filling ratio of soilbag and the arrangement type of the soilbag on the two dynamic parameters,i.e.,the dynamic shear modulus and the damping ratio,of SBRSM were investigated. The results indicate that:(1) the dynamic shear modulus( ) of SBRSM increases exponentially with the vertical pressure,and decreases with the rubber content(RC) with approximately linear lg -RC relationship,and the slope of the lg -RC relationship decreases slightly with the strain amplitude increasing. (2) In the strain range greater than 1%,the damping ratio of SBRSM decreases slightly with both of rubber content and strain amplitude,and decreases in power function with the vertical pressure. (3) of SBRSM decays with the decrease of filling ratio. Though the damping ratio is less affected by filling ratio of soilbag,a lower filling ratio would reduce the influence of vertical pressure on the damping ratio. (4) Both lower and higher damping ratio of SBRSM would be gained when laying soilbags vertically comparing with laying them horizontally,and the horizontal shearing direction affects the dynamic properties of SBRSM little when soilbags are paved horizontally. The mechanisms of dynamic deformation characteristics of SBRSM are revealed by comparison of the dynamic characteristics between SBRSM and RSM without soil bag reinforcement.
|
|
|
|
|
|
| [1] MATSUOKA H,LIU S. New earth reinforcement method by soilbags (\"DONOW\")[J]. Soils and Foundations,2003,43(6):173–188.
[2] 刘斯宏,松冈元. 土工袋加固地基新技术[J]. 岩土力学,2007,28(8):1 665–1 670.(LIU Sihong,MATSUOKA Hajime. A new earth reinforcement method by soilbags[J]. Rock and Soil Mechanics,2007,28(8):1 665–1 670.(in Chinese))
[3] LIU S,FAN K,XU S. Field study of a retaining wall constructed with clay-filled soilbags[J]. Geotextiles and Geomembranes,2019,47(1):87–94.
[4] 刘斯宏,薛向华,樊科伟,等. 土工袋柔性挡墙位移模式及土压力研究[J]. 岩土工程学报,2014,36(12):2 267–2 273.(LIU Sihong,XUE Xianghua,FAN Kewei,et al. Earth pressure and deformation mode of a retaining wall constructed with soilbags[J]. Chinese Journal of Geotechnical Engineering,2014,36(12):2 267–2 273.(in Chinese))
[5] 白福青,刘斯宏,王艳巧. 土工袋加固原理与极限强度的分析研究[J]. 岩土力学,2010,31(增1):172–176.(BAI Fuqing,LIU Sihong,WANG Yanqiao. Research on reinforcement mechanism and failure strength of soilbags[J]. Rock and soil mechanics,2010,31(Supp.1):172–176.(in Chinese))
[6] XU Y,HUANG J,DU Y,et al. Earth reinforcement using soilbags[J]. Geotextiles and Geomembranes,2008,26(3):279–289.
[7] LIU S,GAO J,WANG Y,et al. Experimental study on vibration reduction by using soil bags[J]. Geotextiles and Geomembrances,2014,42(1):52–62.
[8] 刘斯宏,樊科伟,陈笑林,等. 土工袋层间摩擦特性试验研究[J]. 岩土工程学报,2016,38(10):1 874–1 880.(LIU Sihong,FAN Kewei,CHEN Xiaolin,et al. Experimental studies on interface friction characteristics of soilbags[J]. Chinese Journal of Geotechnical Engineering,2016,38(10):1 874–1 880.(in Chinese))
[9] YOUSEF A,RICHARD M,HARUYUKI Y,et al. Numerical analysis of soilbags under compression and cyclic shear[J]. Computers and Geotechnics,2011,38:659–668.
[10] YE B,MURAMATSU D,YE G L,et al. Numerical assessment of vibration damping effect of soilbags[J]. Geosynthetics International,2011,18(4):159–168.
[11] ANBAZHAGAN P,MAMATHA M,SOUMYASHREE P,et al. Laboratory characterization of tyre crumbs soil mixture for developing low cost damping materials[J]. International Journal of Earth Sciences and Engineering,2011,4(6):63–66.
[12] 刘方成,陈 璐,王海东. 橡胶砂动剪模量和阻尼比循环单剪试验研究[J]. 岩土力学,2016,37(7):1 903–1 913.(LIU Fangcheng,CHEN Lu,WANG Haidong. Evaluation of dynamic shear modulus and damping ratio of rubber-sand mixture based on cyclic simple shear tests[J]. Rock and Soil Mechanics,2016,37(7):1 903–1 913.(in Chinese))
[13] DAS S,BHOWMIK D. Small-strain dynamic behavior of sand and sand-crumb rubber mixture for different sizes of crumb rubber particle[J]. Journal of Materials in Civil Engineering,2020,32(11):04020334. https://doi.org/10.1061/(ASCE)MT.1943-5533.0003425
[14] RIOS S,KOWALSKA M,VIANA DA FONSECA A. Cyclic and dynamic behavior of sand-rubber and clay-rubber mixtures[J]. Geotechnical and Geological Engineering,2021. https://doi.org/10. 1007/ s10706–021–01704–3.
[15] 王 瑛,史培军,王静爱. 中国农村地震灾害特点及减灾对策[J]. 自然灾害学报,2005,14(1):82–89.(WANG Ying,SHI Peijun,WANG Jingai. Characteristics of seismic disaster in rural area and relative disaster reduction countermeasures in China[J]. Journal of Natural Disasters,2005,14(1):82–89.(in Chinese))
[16] 清华大学、西南交通大学和北京交通大学土木工程结构专家组. 汶川地震建筑震害分析[J]. 建筑结构学报,2008,29(4):1–9.(Civil and Structural Groups of Tsinghua University,Xinan Jiaotong University and Beijing Jiaotong University. Analysis on seismic damage of buildings in the Wenchuan earthquake[J]. Journal of Building Structures,2008,29(4):1–9.(in Chinese))
[17] TSANG H H. Seismic isolation by rubber-soil mixtures for developing countries[J]. Earthquake Engineering and Structural Dynamics,2007,37(7):283–303.
[18] TSANG H H,LO S H,XU X,et al. Seismic isolation for low-to-medium-rise buildings using granulated rubber-soil mixtures:numerical study[J]. Earthquake Engneering and Structure Dynamics,2012,41(14):2 009–2 024.
[19] ABDELHALEEM A M,EL-SHERBINY R M,LOTFY H,et al. Evaluation of rubber/sand mixtures as replacement soils to mitigate earthquake induced ground motions[C]// Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering. Paris:[s. n.],2013:3 163–3 166.
[20] PITILAKIS K,KARAPETROU S,TSAGDI K. Numerical investigation of the seismic response of RC buildings on soil replaced with rubber-sand mixtures[J]. Soil Dynamics and Earthquake Engineering,2015,79:237–252.
[21] BRUNET S,DE LA LLERA J C,KAUSEL E. Non-linear modeling of seismic isolation systems made of recycled tire-rubber[J]. Soil Dynamics and Earthquake Engineering,2016,(85):134–145.
[22] 刘方成,任东滨,刘 娜,等. 土工格室加筋橡胶砂垫层隔震效果数值分析[J]. 土木工程学报,2015,47(增2):1–7.(LIU Fangcheng,REN Dongbin,LIU Na,et al. Numerical simulation onthe isolation effect of geocell reinforced rubber-sand mixture cushion as earthquake base isolator[J]. China Civil Engineering Journal,2015,47(Supp.2):1–7.(in Chinese))
[23] TSANG H H,TRAN D P,HUNG W Y,et al. Performance of geotechnical seismic isolation system using rubber-soil mixtures in centrifuge testing[J]. Earthquake Engineering and Structural Dynamics,2021,50(5):1 271–1 289.
[24] PITILAKIS D,ANASTASIADIS A,VRATSIKIDIS A,et al. Large- scale field testing of geotechnical seismic isolation of structures using gravel-rubber mixtures[J]. Earthquake Engineering and Structural Dynamics,2021,https://doi.org/10.1002/eqe.3468
[25] 岁小溪. 橡胶颗粒–砂混合物的隔震性能研究[硕士学位论文][D]. 长沙:湖南大学,2009.(SUI Xiaoxi. The study on seismic isolation performance of granulated rubber-sand mixture[M. S. Thesis][D]. Changsha:Hunan University,2009.(in Chinese))
[26] 刘方成,杨 峻. 低、多层房屋基底软土垫层隔震研究[J]. 地震工程与工程振动,2014,1(3):245–254.(LIU Fangcheng,YANG Jun. Research on isolated low-rise buildings using a thin soft soil layer[J]. Earthquake Engineering and Engineering Dynamics,2014,1(3):245–254.(in Chinese))
[27] 刘方成,吴孟桃,陈巨龙,等. 土工格室加筋对橡胶砂动力特性影响的试验研究[J]. 岩土工程学报,2017,39(9):1 616–1 625.(LIU Fangcheng,WU Mengtao,CHEN Julong,et al. Experimental study on influence of geo-cell reinforcement on dynamic properties of rubber-sand mixtures[J]. Chinese Journal of Geotechnical Engineering,2017,39(9):1 616–1 625.(in Chinese))
[28] 刘方成,张永富,周亚栋. 土工格室加筋橡胶砂垫层隔震试验研究[J]. 建筑结构学报,2016,37(增1):93–100.(LIU Fangcheng,ZHANG Yongfu,ZHOU Yadong. Experimental study on isolating performance of geo-cell reinforced rubber-sand mixture cushion[J]. Journal of Building Structures,2016,37(Supp.1):93–100.(in Chinese))
[29] 刘方成,陈巨龙,王海东,等. 一种大型循环单剪试验装置研究[J]. 岩土力学,2016,37(11):3 336–3 346.(LIU Fangcheng,CHEN Julong,WANG Haidong,et al. Study on a large-scale cyclic simple shear test apparatus[J]. Rock and Soil Mechanics,2016,37(11): 3 336–3 346.(in Chinese))
[30] 尚守平,刘方成,杜运兴,等. 应变累积对黏土动剪模量和阻尼比影响的试验研究[J]. 岩土力学,2006,27(5):683–688.(SHANG Shouping,LIU Fangcheng,DU Yunxing,et al. Experimental study on effect of shear strain accumulation on dynamic shear modulus and damping ratio of clay soil[J]. Rock and Soil Mechanics. 2006,27(5):683–688. (in Chinese))
[31] ZHENG Y F,SUTTER K G. Dynamic properties of granulated rubber/sand mixtures[J]. Geotechnical Testing Journal,2000,23(3):338–344.
[32] SENETAKIS K,ANASTASIADIS A,PITILAKIS K. Dynamic properties of dry sand/rubber(SRM) and gravel/rubber(GRM) mixtures in a wide range of shearing strain amplitudes[J]. Soil Dynamics and Earthquake Engineering,2012,33:38–53. |
|
|
|