نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی عمران، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
2 گروه مهندسی عمران، واحد زنجان، دانشگاه آزاد اسلامی، زنجان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this paper, a two-dimensional half-space model is presented in the presence of a subsurface circular cavity under a uniform surface scalar pulse. In this regard, a dual reciprocity boundary element method (DR-BEM) was successfully developed, in which the discretizing process was only applied to the boundary of the model as well as a few internal points. The simple formulation and step-by-step transient analysis in the absence of time-domain fundamental solutions were some of the characteristics of the implemented approach. First, by introducing the method and briefly presenting the formulation, a time-domain algorithm was prepared based on the mentioned approach, then it was validated by comparing with the existing analytical solutions. Moreover, by modeling a half-space domain including a subsurface circular cavity, the transient displacement was obtained at different points of the ground surface and the cavity wall, subjected to the surface pulse of the Ricker wavelet type function. The results showed that the presence of the cavity was effective not only in changing the distribution pattern, but also in the formation of safe areas behind the wave front. The efficient approach is recommended to all researchers in the field of geotechnical earthquake engineering, especially in the analysis of surface explosions.
کلیدواژهها [English]