Geomechanics and Engineering

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On determining seismic anchor force of anchoring frame structure supporting three-stage slope

  • Lin, Yu-liang (School of Civil Engineering, Central South University) ;
  • Lu, Li (School of Civil Engineering, Central South University) ;
  • Li, Ying-xin (School of Civil Engineering, Central South University) ;
  • Xue, Yuan (China Railway Eryuan Engineering Group Co. Ltd.) ;
  • Feng, Zhi-jun (China Railway Eryuan Engineering Group Co. Ltd.) ;
  • Wang, Zhi-meng (China Railway Eryuan Engineering Group Co. Ltd.) ;
  • Yang, Guo-lin (School of Civil Engineering, Central South University)
  • Received : 2020.03.03
  • Accepted : 2020.07.06
  • Published : 2020.08.10
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Abstract

As a flexible supporting structure, the anchoring frame structure is widely adopted to support multistage slopes in high earthquake-intensity area for its effectiveness and practicality. The previous study indicates that the anchor of anchoring frame structure is the most likely to be damaged during earthquakes. It is crucial to determine the pull-out capacity of anchor against seismic force for the seismic design of anchoring frame structure. In this study, an analytical model of a three-stage slope supported by anchoring frame structure is established, and the upper bound method of limit analysis is applied to deduce the seismic anchor force of anchoring frame structure. The pull-out capacity of anchor against seismic force of anchoring frame structure at each stage is obtained by computer programming. The proposed method is proved to be reasonable and effective compared with the existing published solution. Besides, the influence of main parameters on the pull-out capacity of anchor against seismic force is analyzed to provide some recommendations for the seismic design of anchoring frame structure.

Keywords

Acknowledgement

The authors sincerely acknowledge the financial support from the National Natural Science Foundation of China (Grant Nos. 51878667, 51678571, 51308551), and the Hunan Provincial Natural Science Foundation of China (Grant No. 2018JJ2517). The first author gratefully acknowledges the financial support from China Scholarship Council (Grant No. 201806375024). The authors also acknowledge the helpful comments on this paper from anonymous reviewers.

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