چکیده مقاله
High speed trains are able to produce vibrations which cause serious problem for near buildings and their households and near sensitive infrastructures Regarding multilayered soil profile in nature, engineers need to use a reliable and low cost approach to predict the vibrations due to high speed 2 5D finite element models are able to obtain 3D response from 2D meshes, and they have lower computational costs than full 3D models Moreover, 2 5D models are able to stimulate details regarding wheel track interaction as well In this paper, a 2 5D FEM is proposed for predicting vibration due to high speed trains A multilayered profile is modeled, and effects of frequency and velocity ranges, soil dynamics properties are investigated Displacements are calculated in three speed zones: sub sonic, tran sonic and super sonic All equation solved in frequency domain for simplicity It is found out that the vibration amplitude increased with increasing in velocity, however, the maximum magnitude would be around Rayleigh wave velocity In addition, when the moving load travels under the Rayleigh wave velocity, the vibration amplitude would be lower than tran sonic and super sonic speeds In depths where the soil material changes, the trend of dynamics response changes either In the other words, the way of wave propagation changes according to the Rayleigh, Shear and Compressional waves velocity of the soil layer
کلیدواژهها
نویسندگان
Mohammad Amin Dargi
Graduated Master of Science, School of Civil Engineering, College of Engineering, University ofTehran
Reza Rafiee Dehkharghani
Assistant Professor, School of Civil Engineering, College of Engineering, University of Tehran
شیوه ارجاع
Dargi, Mohammad Amin and Rafiee Dehkharghani, Reza,1402,A 2.5 Dimensional Finite Element Model For Predicting The Vibrations In A Visco-Elastic Multi-Layered Half-Space Subjected To High-Speed Train,13th International Congress on Civil Engineering,Tehran
ارائهشده در
مجموعه مقالات سیزدهمین کنگره بین المللی مهندسی عمران25 مهر 1402 · تهران