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| Characteristics of Vibration Response of Typical Structure Embankments at Permafrost Regions Along the Qinghai-Tibet Railroad |
| WU Zhi-Jian-1, 2 , CHEN Tuo-1, MA Wei-3, WANG Lan-Min-1, 2 |
| (1. Open Laboratory of Loess Earthquake Engineering, Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China; 2. Lanzhou Base of Institute of Earthquake Science, China Earthquake Administration, Lanzhou 730000, China; 3. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China） |
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Abstract Different kinds of embankments are employed at permafrost regions along the Qinghai-Tibet Railroad. In order to obtain their dynamic response characteristics of typical structure embankments under the effect of train vibration loading at permafrost regions, strong motion observation tests were carried out, at warm and cold seasons of the Qinghai-Tibet plateau, at crushed rock embankment and plain fill embankment at the Beilu River segment. Based on these tests in situ, the dynamic finite element analysis method of two dimensions linearly equivalent was applied for dynamic response numerical calculation on these two embankments. The results show that there is an obvious damping effect during the transfer process from road shoulder to slope toe, the value of vibration attenuation in warm season is greater than that in cold season. And the vibration attenuation in crushed rock embankment is greater than that in plain fill embankment at center roadbed where natural ground locates.
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Received: 15 October 2010
Published: 30 May 2011
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