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Seismic response of multi-tiered reinforced soil retaining walls
Institution:1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China;2. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China;3. Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY 10027, USA;1. Department of Civil and Environmental Engineering, Mississippi State University, Mississippi State, MS 39762, USA;2. Dept. of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USA;3. ADAMA Engineering, Inc., P.O. Box 90217, Portland, OR 97290, USA;1. Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Rd., Taipei 106, Taiwan;2. National Central University, No. 300, Jhongda Rd., Jhongli City, Taoyuan County 320, Taiwan;1. Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;2. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China;3. Department of Civil Engineering, Nagoya Institute of Technology, Showa-ku, Gokiso-cho, Nagoya 466-8555, Japan;4. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;1. Key Laboratory of High-Speed Railway Engineering of Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. School of Civil Engineering and Environmental Science, University of Oklahoma, 202 W. Boyd St., Room 334, Norman, OK 73019, USA;1. Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;2. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China;3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu 610059, China;4. Department of Civil Engineering, Nagoya Institute of Technology, Showa-ku, Gokiso-cho, Nagoya 466-8555, Japan;5. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
Abstract:In this study, a validated Finite Element procedure was used to investigate the similarities and differences of seismic performances between single- and multi-tiered reinforced soil walls. Three-tiered walls at a total height of 9 m were analyzed together with vertical walls at the same height. It was found from the Finite Element analyses that the resonant frequency of reinforced soil walls might increase with an increase in the tier-offset. The multi-tiered configuration could considerably reduce the residual lateral facing displacement and the average reinforcement load, and the reinforcement load distribution with height was different from that in vertical walls. With the same reinforcement length and spacing, the multi-tiered walls resulted in smaller reinforcement connection loads with the facing blocks. The study filled the gap of seismic behavior of multi-tiered reinforced soil retaining walls and revealed a few unique dynamic properties of this type of earth structures.
Keywords:Geosynthetic-reinforced soil retaining walls  Multi-tiered configuration  Earthquake response  Finite Element method  Soil–geogrid interface
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