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| Shaking table tests of cantilevered reinforced soil retaining walls |
| WEI Ming1，2，LUO Qiang1，2，JIANG Liangwei1，2，WANG Tengfei1，2，ZUO Deqi1，2 |
| (1. School of Civil Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；2. MOE Key Laboratory of High-speed Railway Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China) |
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Abstract The application of reinforcement elements in compacted backfill can significantly improve the seismic resistance of a retaining structure. In this paper，shaking table tests were performed on cantilevered reinforced earth retaining walls under sine wave loading at a frequency of 5 Hz，and the response acceleration of the model wall and the backfill，the dynamic earth pressure and displacement of the wall，and the dynamic tensile force of the reinforcement were monitored under 0.11 g(minor)，0.24 g(moderate) and 0.39 g(major) accelerations. The variations of dynamic characteristics of the model structure，the interaction between the wall and the backfill，and the stress level of the reinforcement with different imposed accelerations were illuminated. The results show that the propagation of the acceleration in the backfill shows hysteresis and nonlinear amplification effects and the acceleration tends to increase with rising the vibration amplitude. The most unfavorable condition(critical state) of the system stability means that the wall moves away from the backfill under the maximum inertia force. The synchronization between the peak dynamic earth pressure on the wall back and the peak inertia force of the wall becomes more pronounced with larger acceleration amplitude. The earth pressure acting on the wall is more significant with an acceleration of 0.39 g. The dynamic earth pressure acting on the upper portion of the wall is generally higher than that on the lower portion，and the resultant force acts at approximately 2/3 of the height of the wall，much larger than that obtained from the current code. The dynamic tensile force of the reinforcement increasing with the acceleration amplitude presents an inhomogeneous spatial distribution，and the connecting line of the points of the maximal tensile force reflecting the potential failure surface shows piecewise linear through the end of the slab base.
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[1] 李海光. 新型支挡结构设计与工程实例[M]. 北京：人民交通出版社，2011：79–81.(LI Haiguang. Design and engineering example of new type retaining structure[M]. Beijing：China Communications Press，2011：79–81.(in Chinese))
[2] MONONOBE N，MATSUO H. On the determination of earth pressure during earthquakes[C]// Proceedings of the World Engineering Conference. Tokyo，Japan：[s. n.]，1929：179–187.
[3] OKABE S. General theory of earth pressure[J]. Journal of the Japanese Society of Civil Engineers，1926，12(1)：123–134.
[4] SEED H，WHITMAN R. Design of earth retaining structures for dynamic loads[C]// ASCE Specialty Conference on Lateral Stresses in the Ground and Design of Earth Retaining Structures. [S. l.]：[s. n.]，1970：103–147.
[5] NAKAMURA S. Reexamination of Mononobe-okabe theory of gravity retaining walls using centrifuge model tests[J]. Soils and Foundations，2006，46(2)：135–146.
[6] AL ATIK L，SITAR N. Seismic earth pressures on cantilever retaining structures[J]. Journal of Geotechnical and Geoenvironmental Engineering，2010，136(10)：1 324–1 333.
[7] JO S B，HA J G，YOO M，et al. Seismic behavior of an inverted T-shape flexible retaining wall via dynamic centrifuge tests[J]. Bulletin of Earthquake Engineering，2013，12(2)：961–980.
[8] ATHANASOPOULOS-ZEKKOS A，VLACHAKIS V S，ATHANASOPOULOS G A. Phasing issues in the seismic response of yielding，gravity-type earth retaining walls—Overview and results from a FEM study[J]. Soil Dynamics and Earthquake Engineering，2013，55：59–70.
[9] GAZETAS G，PSARROPOULOS P N，ANASTASOPOULOS I，et al. Seismic behaviour of flexible retaining systems subjected to short-duration moderately strong excitation[J]. Soil Dynamics and Earthquake Engineering，2004，24(7)：537–550.
[10] GREEN R A，OLGUN C G，CAMERON W I. Response and modeling of cantilever retaining walls subjected to seismic motions[J]. Computer-Aided Civil and Infrastructure Engineering，2008，23(4)：309–322.
[11] KOSEKI J，TATSUOKA F，MUNAF Y，et al. A modified procedure to evaluate active earth pressure at high seismic loads[J]. Soils and Foundations，1998，38(Supp.)：209–216.
[12] LEW M，SIMANTOB E，HUDSON M B. Performance of shored earth retaining systems during the January 17，1994，Northridge earthquake[C]// Third International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. [S. l.]：[s. n.]，1995：1 417–1 422.
[13] TATSUOKA F，TATEYAMA M，KOSEKI J. Performance of soil retaining walls for railway embankment[J]. Soils and Foundations，1996，36(Supp.)：311–324.
[14] 陈乐生，庄卫林，赵河清，等. 汶川地震公路震害调查[M]. 北京：人民交通出版社，2012：12–26.(CHEN Lesheng，ZHUANG Weilin，ZHAO Heqing，et al. Report on highway¢s damage in the Wenchuan earthquake[M]. Beijing：China Communications Press，2012：12–26.(in Chinese))
[15] 李 浩，罗 强，张 良，等. 衡重式加筋土路肩挡墙土工离心模型试验研究[J]. 岩土工程学报，2014，36(3)：458–465.(LI Hao，LUO Qiang，ZHANG Liang，et al. Centrifugal model tests on shoulder balance weight retaining wall with reinforced earth[J]. Chinese Journal of Geotechnical Engineering，2014，36(3)：458–465.(in Chinese))
[16] 杨长卫，张建经，陈 强，等. 加筋重力式挡土墙抗震设计方法研究[J]. 土木工程学报，2015，48(8)：77–85.(YANG Changwei，ZHANG Jianjing，CHEN Qiang，et al. Research on aseismic design of reinforced gravity retaining wall[J]. China Civil Engineering Journal，2015，48(8)：77–85.(in Chinese))
[17] 汤 勇. 加锚悬臂式挡墙理论分析与工程应用研究[硕士学位论文][D]. 长沙：中南大学，2010.(TANG Yong. Theoretical analysis and engineering application of anchored cantilever retaining wall[M. S. Thesis][D]. Changsha：Central South University，2010.(in Chinese))
[18] IAI S. Similitude for shaking table tests on soil-structure-fluid model in 1g gravitational field[J]. Soils and Foundations，1989，29(1)：105–118.
[19] WOOD D M. Geotechnical modeling[M]. London：Taylor and Francis Group，2004：1–60.
[20] YAZDANDOUST M. Investigation on the seismic performance of steel-strip reinforced-soil retaining walls using shaking table test[J]. Soil Dynamics and Earthquake Engineering，2017，97：216–232.
[21] KOSEKI J. Use of geosynthetics to improve seismic performance of earth structures[J]. Geotextiles and Geomembranes，2012，34(1)：51–68.
[22] XU P，HATAMI K，JIANG G. Study on seismic stability and performance of reinforced soil walls using shaking table tests[J]. Geotextiles and Geomembranes，2020，48(1)：82–97.
[23] BATHURST R J，HATAMI K. Seismic response analysis of a geosynthetic-reinforced soil retaining wall[J]. Geosynthetics International，1998，5(1/2)：127–166.
[24] YAO J，DI D，JIANG G，et al. Real-time acceleration harmonics estimation for an electro-hydraulic servo shaking table using kalman filter with a linear model[J]. IEEE Transactions on Control Systems Technology，2014，22(2)：794–800.
[25] CONTI R，MADABHUSHI G S P，VIGGIANI G M B. On the behaviour of flexible retaining walls under seismic actions[J]. Géotechnique，2012，62(12)：1 081–1 094.
[26] HATAMI K，BATHURST R. Effect of structural design on fundamental frequency of reinforced-soil retaining walls[J]. Soil Dynamics and Earthquake Engineering，2000，19(3)：137–157.
[27] 蒋良潍，姚令侃，吴 伟，等. 传递函数分析在边坡振动台模型试验的应用探讨[J]. 岩土力学，2010，31(5)：1 368–1 374.(JIANG Liangwei，YAO Lingkan，WU Wei，et al. Transfer function analysis of earthquake simulation shaking table model test of side slopes[J]. Rock and Soil Mechanics，2010，31(5)：1 368–1 374.(in Chinese)) |
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2021, Vol. 40 
