Abstract
In order to obtain the seismic dynamic characteristics of a shallow‐bias tunnel with a small space, a series of large‐scale shaking table model tests were carried out. The key technology of the test is introduced in detail, for example, similar ratios of model, test equipment, testing model box, testing model, sensor arrangement, seismic waves, and testing system. The results show that the first predominant frequency is similar between measuring points. However, the second predominant frequency is highly different between measuring points. The first and second predominant frequencies gradually decrease with the increasing of input PGA. The rock stratum can shield seismic wave in the high frequency band. The research results provide reference for similar tunnels.
Highlights
In recent years, with the development of Chinese Western Development and the construction of the Silk Roads, many tunnels will be constructed in the mountainous and earthquake-prone western area
Gao et al [11] carried out the large-scale shaking table model test to study the seismic response of lining stress with different types of seismic wave, seismic intensity, and different buried depth
Wang et al [14] carried out a series of shaking table tests to study the effect of the seismic wave type, excitation directions, and peak acceleration on the acceleration and strain response characteristics of the tunnel
Summary
With the development of Chinese Western Development and the construction of the Silk Roads, many tunnels will be constructed in the mountainous and earthquake-prone western area. Xu et al [13] carried out a series of shaking table tests to investigate the mechanism and the effect of seismic measures of mountain tunnel. They found that the adding a layer of steel wire mesh, installing a geofoam isolation layer and flexible joints, and reinforcing surrounding rock could reduce the dynamic response of tunnel. Wang et al [14] carried out a series of shaking table tests to study the effect of the seismic wave type, excitation directions, and peak acceleration on the acceleration and strain response characteristics of the tunnel. The large-scale shaking table model tests were carried out to obtain the response of Fourier spectra and the variation laws of predominant frequencies.
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