›› 2016, Vol. 37 ›› Issue (9): 2553-2560.doi: 10.16285/j.rsm.2016.09.016

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Seismic property of a large section tunnel based on shaking table model tests

GUAN Zhen-chang1, GONG Zhen-feng1, LUO Zhi-bin1, CHEN Ren-chun2, HE Chuan3   

  1. 1. College of Civil Engineering, Fuzhou University, Fuzhou, Fujian 350116, China; 2. Fuzhou Planning Design & Research Institute, Fuzhou, Fujian 350108, China; 3. College of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
  • Received:2016-01-26 Online:2016-09-12 Published:2018-06-09
  • Supported by:

    This work was supported by the Natural Science Foundation of China (51678155) and the Visiting Scholarship Program of Human Resource and Social Security Department of Fujian Province (2014-375).

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Abstract: In this study, a 1/30 model for a large section tunnel is firstly designed based on the extension project of Jinjishan Tunnel along Fuzhou 2nd ring road. Then the earthquake-simulating tests are conducted under 21 different loading conditions using a bidirectional earthquake shaking table apparatus at Fuzhou University. Through Fourier analysis of testing results, it indicates that the existence of the large section tunnel changes the seismic property of original ground significantly. It is also found that the 1st predominant frequency reflects the seismic properties of original ground, while the 2nd predominant frequency demonstrates seismic properties of the lining structure. The frequency-response analysis of testing results shows that the components augment significantly around the 2nd predominant frequency, when the seismic wave propagates from the bottom to top until the lining structure. The most-augmented frequency almost equals to the 2nd predominant frequency. The relationship between the seismic property of the large section tunnel and the amplitude of input ground motion is studied in detail. The apparent cracks emerge on the lining structure after the excitation by the large ground motion, which significantly reduces the overall stiffness of the large section tunnel. Moreover, both the 2nd predominant frequency and the most-augmented frequency show remarkable reductions. In conclusion, this study provides some useful suggestions for the earthquake fortification of the large section tunnel.

Key words: large section tunnel, seismic property, shaking table model test, Fourier analysis, frequency response analysis

CLC Number: 

  • U 451

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