نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 گروه مهندسی عمران، واحد زنجان، دانشگاه آزاد اسلامی، زنجان
2 گروه مهندسی عمران، دانشگاه آزاد اسلامی واحد زنجان، زنجان
3 پژوهشکده مهندسی ژئوتکنیک، پژوهشگاه بینالمللی زلزلهشناسی و مهندسی زلزله، تهران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this paper, the seismic response of an orthotropic Gaussian-shaped valley exposed to incident SH-waves is presented. The time-domain orthotropic half-space boundary element method, previously proposed by the authors for analyzing the aforementioned problem, is employed. Material damping is applied indirectly using logarithmic functions in the formulation. Additionally, the results are validated through a convergence approach for a circular valley, assuming certain key model parameters, such as isotropy factor, valley aspect ratio, and frequency content. The seismic amplification patterns of the ground surface are sensitively investigated in both time and frequency domains. The obtained responses are primarily presented as two/three-dimensional graphs in both the time and frequency domains. The results indicated that the material properties of the valley and the orientation of geological formations significantly affect the seismic amplification pattern of the ground surface. Moreover, the maximum valley amplification of 2.14 occurred for periods less than 0.5 and the assumed maximum isotropy factor.
کلیدواژهها [English]