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Earthquake loading response of a slope with an inclined weak intercalated layer using centrifuge modeling

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Abstract

Seismic performance and the dynamic deformation mode of a slope with a weak intercalated layer (WIL) under earthquake excitations are very important for suitable seismic design of certain structures. In southwestern China, near the Longmenshan Fault, the dynamic response of slopes triggered by earthquakes is still not well understood. In this study, a series of dynamic centrifuge model tests under a 50-g hypergravity treatment with different input seismic motions were performed to investigate the effect of the input motion on the dynamic behavior of the WIL slope. The test results indicate that the amplification factors of the acceleration response increased with increasing height of the slope, reaching maximum values at the crest and the top surface, but abrupt changes in amplification with increasing height occurred at the WIL. The acceleration amplification at the WIL was related to the peak of the input motion. The amplification factor at the intercalated layer was weakened when the peak of input acceleration was equal to or less than 0.15 g, but it increased when the input peak was greater than 0.15 g. Acceleration amplification at the WIL was affected by the slope structure effect.

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Acknowledgements

The authors gratefully acknowledge the financial support of the Key Program of the National Natural Science Foundation of China (Grant No. 41530639 and 51708163) and the Cultivation Program for Excellent Doctoral Dissertation of Southwest Jiaotong University (Grant No. D-YB201702). The technical support of the Key Laboratory of Soft Soil and Environment Engineering, Ministry of Education, Zhejiang University is also appreciated.

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Authors and Affiliations

  1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Kongming Yan & Jianjing Zhang

  2. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Qiangong Cheng

  3. ARC Centre of Excellence for Geotechnical Science & Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia

    Jinbiao Wu

  4. College of Civil Engineering and Architecture, Hainan University, Haikou, 570228, China

    Zhijia Wang

  5. Nuclear Industry Southwest Survey&Design Institute Co., Ltd, Chengdu, 610061, China

    Hua Tian

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  1. Kongming Yan
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  2. Jianjing Zhang
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  3. Qiangong Cheng
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  4. Jinbiao Wu
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  5. Zhijia Wang
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Correspondence to Jianjing Zhang.

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Yan, K., Zhang, J., Cheng, Q. et al. Earthquake loading response of a slope with an inclined weak intercalated layer using centrifuge modeling. Bull Eng Geol Environ 78, 4439–4450 (2019). https://doi.org/10.1007/s10064-018-1421-4

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  • DOI: https://doi.org/10.1007/s10064-018-1421-4

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