Based on shear beam theory, seismic response of a slope was obtained under condition of horizontal earthquake excitation. Because mass of soil nailing was smaller compared to that of soil, its inertia force could be ignored. The movements both of soil nailing and soil where nearly in phase and the damage of a soil nailing depended on the size of its deformation not its inertia force, so the soil nailing was simplified as a one-dimension elastic rod without mass. The seismic response of the soil nailing was derived using compatibility of deformation and Hooke's law. The method was applied to a practical case to conduct seismic analysis and design. Using finite element software (ADINA) to verify the proposed method, the results showed that its design and the analysis are safe and reliable. The calculation method provided a theoretical basis for earthquake analysis and a seismic design of a soil nailing supporting structure.
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