PLAXIS 2D DYNAMICS UPDATE

Conventional static displacement boundary conditions are considered, consisting of restraining the horizontal displacements along the lateral boundaries of the model and both horizontal and vertical displacements along the bottom boundary of the model. The water level is located at the soil-rock interface, with the soil deposit being considered fully dry.ДЄ horizontal pseudo-static acceleration coefficient of k xВ = в€’0.50 is applied. The mechanical response of the soil deposit is modeled with Mohr-Coulomb model. The first example consists of a level deposit of soil with 12.0 m of thickness overlying a perfectly rigid bedrock. Level ground deposit subjected to a horizontal pseudo-static acceleration In all examples, 2D plane-strain conditions are considered.ДЎ.

PLAXIS 2D DYNAMICS UPDATE

Three examples described in the literature (Loukidis et al.,2003 Kontoe et al., 2013) are reproduced using PLAXIS 2D CONNECT Edition V20 Update 2 to illustrate the fundamentals of the pseudo-static approach. Note that these forces are applied to the whole mesh. Where F x, F yВ and F zВ are the components of the body force along x-, y- and z-direction, k x, k yВ and k zВ are the corresponding pseudo-static acceleration coefficients, which are input parameters, and W is the weight of the mass. In this approach, the effects of dynamic loading (such as earthquake-induced loading) are represented by equivalent inertial forces, which are approximated as constants body forces, with magnitude proportional to the horizontal and/or vertical accelerations imposed by the dynamic loading: Time-domain analysis using acceleration (velocity or displacement) time histories generally provide the most accurate tool for the simulation of the response of geotechnical structures under dynamic loading, this type of analysis is typically very time-consuming.ДЄs a result, a pseudo-static analysis may provide at least a preliminary assessment of the stability of geotechnical structures. The fundamentals ofВ pseudo-static analysis in Bentley's PLAXIS softwareВ are presented below. Despite being a simplified approach, finite element pseudo-static analysis may provide a reliable tool due to its simplicity and relative inexpensiveness.

Plaxis 2d dynamics