(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of
Sciences，Wuhan，Hubei 430071，China；2. Geotechnical and Structural Engineering Research Center，
Shandong University，Jinan，Shandong 250061，China)
Abstract：Artificial boundary and seismic input method directly affect the calculation accuracy in aseismic analysis of underground structure using finite element method(FEM). The interaction between artificial boundary and seismic input method is studied on the basis of principle of artificial and seismic input method. The results show that different input methods significantly affect the efficiency of artificial boundary；and different artificial boundaries need compatible seismic input methods. The seismic input method compatible with artificial boundary and input program are proposed. The results using this input method and input program are in good agreement with theoretical solutions. Thereby，the theoretical basis of artificial boundary and seismic input method is provided for underground structures in seismic analysis using FEM.
2013, Vol. 32 
