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This work investigates the scattering of antiplane shear waves by tunnel in inhomogeneous half-space. The inhomogeneity of the medium is reflected in that the shear modulus is a two-dimensional function. Based on the complex function method, the analytical expressions of wave fields are obtained. The unknown coefficients can be obtained by boundary conditions. In the numerical example, the displacement amplitude of the horizontal surface and the dynamic response of lining structure are discussed. The results show that the inhomogeneous parameters, the reference wave numbers and the positions have obvious effects on the displacement amplitude and the dynamic response.

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Underground subway RC structures suffered significant damage during many earthquakes, so it is important to study the seismic behavior on RC subway structure. The shaking table model test is made of the Beijing typical subway station structure. In this article, the test is introduced briefly; then, the acceleration history curves are analyzed. By the test, it is found that the interaction exits between structure and soil. Under the low intensity earthquake, the underground structure will exert a very small influence on soil and vibrates with soil; under the high intensity earthquake, the soil will exert a large thrust on the underground structure and the relative displacement exists between them. Moreover, At the bottom of the structure side wall, the peak acceleration is larger than it in soil around the place, and at the top and middle of the structure side wall, the peak accelerations are smaller than them in soil around the place; with the depth increase, decrease the peak value, the excellence frequency and its amplitude of the acceleration time history.