Abstract: The shaking table comparison test was carried out to study the dynamic response of the tunnel through fault under earthquake. In this study, the test materials, choice of the similarity ratio and the dynamic loading conditions were introduced. Test results show that stress on the waist is obviously greater than that on the top and bottom of the tunnel lining under earthquake, which means the waist needs to be strengthened in design. The tunnel lining has a certain acceleration magnification effect. In addition, the main Fourier spectrum energy of the lining is concentrated in the middle and low frequency, and the acceleration and lining strain responses will change abruptly when the structure gets close to failure triggered by earthquake. The development of lining cracks is closely related to their location. Cracks at the bottom of the lining develop from the inside to the outside; however, cracks at the waist develop from the outside to the inside. The smaller the angle between the fault and axial direction of the tunnel is, the more obviously the cracks develop. The ultimate tunnel failure modes consist of longitudinal tensile crack and joint dislocation. This research results provide a reference for the relevant design of the tunnel through fault.

Key words: shaking table comparison test, tunnel through fault, earthquake, failure, crack