Dynamic processes however are usually measured in terms of seconds. A third option is the direct input of harmonic loads.ĭynamic time The duration of most geotechnical processes like excavations or consolidation are measured in terms of days. For earthquake data it is possible to read data records from a SMC-file (Strong motion CD file). Separate damping coefficients can be assigned to different material sets for both soil and structural elementsĭynamic loads Input data for dynamic loads can be read from a user-defined ASCII file. Instead a Rayleigh damping term is assumed that is proportional to the mass and stiffness of the soil material. However, in Plaxis the soil models do not include viscosity as such. Rayleigh damping Material damping in a soil is generally caused by its viscous properties, friction and the development of plasticity. Wave velocities For Mohr-Coulomb and linear elastic models the wave velocities Vp and Vs can be entered as alternatives for the stiffness parameters. Quadratic 6-node and 4th order 15-node triangular elements are available to model the deformations and stresses in the soil. Prescribed velocities and accelerations The boundary condition for prescribed displacements in static calculations has been extended such that it can be used for prescribed velocities and prescribed accelerations in case it concerns dynamic loading. Plaxis Dynamics V 8.6 FeaturesĪbsorbant boundaries To prevent the reflection of propagating waves back inside the model the boundary of the geometry can be modeled as absorbent. Even though vibrations often have 3D-characteristics, in Plaxis version 8, the dynamic model is limited to plain strain and axisymmetric conditions. Plaxis Dynamics analyses module you can analyse the effects of vibrations in the soil. If the loads are powerful, as in earthqueakes, they may cause severe damages.
PLAXIS 2D DYNAMICS PROFESSIONAL
Plaxis Dynamics โปรแกรมเสริม(add- on) ของโปรแกรม Plaxis 2D Professional สำหรับการวิเคราะห์แรงแบบไดนามิกส์ เช่น แรงจากแผ่นดินไหว Soil and structures are often subjected not only to static loads due to constructions in and on the ground surface but also to dynamic loads.
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