Structural Engineering and Mechanics

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Seismic response of combined retaining structure with inclined rock slope

  • Yu-liang, Lin (School of Civil Engineering, Central South University) ;
  • Jie, Jin (School of Civil Engineering, Central South University) ;
  • Zhi-hao, Jiang (China Construction Third Engineering Bureau Co. Ltd.) ;
  • Wei, Liu (China Construction Third Engineering Bureau Co. Ltd.) ;
  • Hai-dong, Liu (China Construction Third Engineering Bureau Co. Ltd.) ;
  • Rou-feng, Li (China Construction Third Engineering Bureau Co. Ltd.) ;
  • Xiang, Liu (Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University)
  • Received : 2020.11.07
  • Accepted : 2022.11.04
  • Published : 2022.12.10
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Abstract

A gravity wall combined with an anchoring lattice frame (a combined retaining structure) is adopted at a typical engineering site at Dali-Ruili Railway Line China. Where, the combined retaining structure supports a soil deposit covering on different inclined rock slopes. With an aim to investigate and compare the effects of inclined rock slopes on the response of combined retaining structure under seismic excitation, three groups of shaking table tests are conducted. The rock slopes are shaped as planar surfaces inclined at angles of 20°, 30°, and 40° with the horizontal, respectively. The shaking table tests are supplemented by dynamic numerical simulations. The results regarding the horizontal acceleration response, vertical acceleration response, permanent displacement mode, and axial anchor force are comparatively examined. The acceleration response is more susceptible to outer structural profile of combined retaining structure than to inclined angle of rock slope. The permanent displacement decreases when the inclined angle of the rock slope increases within a range of 20°-40°. A critical inclined angle of rock slope exists within a range of 20°-40°, and induces the largest axial anchor force in the combined retaining structure.

Keywords

Acknowledgement

This work is supported by the National Natural Science Foundation of China (Grant Nos. 51878667, 51678571, 51308551, 51778486), the Hunan Provincial Natural Science Foundation of China (Grant Nos. 2021JJ30830, 2018JJ2517, 13JJ4017). The comments on this paper from two anonymous reviewers are highly appreciated that are helpful to improve the quality of this paper. The first author also gratefully acknowledge the financial support from the China Scholarship Council (Grant No. 201806375024).

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