Two-dimensional equivalent linear seismic analysis of free field in layered half-space due to oblique incidence
WANG Du-guo1, ZHAO Cheng-gang1, 2
1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China
Abstract：Based on the equivalent linear numerical method in frequency domain and two-dimensional strain space theory, a two-dimensional equivalent linear method is developed, which can be used to calculate the nonlinear seismic response of free field in layered half-space due to oblique incidence. First, the transfer matrix for the elastic layered half-space under oblique wave incidence is established. Then, the method to obtain the equivalent shear strain under inclined waves is established, and the strain-dependent equivalent shear modulus and damp can be obtained. Next, computational iteration is implemented until the error is small enough to be accepted. Finally, the last computed shear modulus and damp are used to describe the characteristic of the layered half-space, and the seismic response of the half-space can be calculated. The nonlinear seismic analysis for one layered half-space under inclined wave (SH, SV and P) is performed, and the effect of the incident angle on the seismic response is discussed.
王笃国, 赵成刚. 地震波斜入射时二维成层介质自由场求解的等效线性化方法[J]. 岩土工程学报, 2016, 38(3): 554-561.
WANG Du-guo, ZHAO Cheng-gang. Two-dimensional equivalent linear seismic analysis of free field in layered half-space due to oblique incidence. Chinese J. Geot. Eng., 2016, 38(3): 554-561.
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