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Geomechanics and Engineering Volume 22, Number 3, August10 2020 , pages 265-275 DOI: https://doi.org/10.12989/gae.2020.22.3.265 |
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On determining seismic anchor force of anchoring frame structure supporting three-stage slope |
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Yu-liang Lin, Li Lu, Ying-xin Li, Yuan Xue, Zhi-jun Feng, Zhi-meng Wang and Guo-lin Yang
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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. | ||
| Key Words | ||
| upper bound limit analysis; seismic anchor force; anchoring frame structure; three-stage slope | ||
| Address | ||
| Yu-liang Lin: 1.) School of Civil Engineering, Central South University, Changsha 410075, China 2.) MOE Key Laboratory of Engineering Structures of Heavy Haul Railway, Central South University, Changsha 410075, China 3.) Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha 410075, China Li Lu, Ying-xin Li and Guo-lin Yang: School of Civil Engineering, Central South University, Changsha 410075, China Yuan Xue, Zhi-jun Feng and Zhi-meng Wang: China Railway Eryuan Engineering Group Co. Ltd., Chengdu 610031, China | ||