SMAP-2D and SMAP-3D

SMAP-2D and SMAP-3D are state-of-the-art multi-phase nonlinear finite element analysis programs which can be applied to compute static, consolidation, or dynamic response of dry, saturated, or partially saturated soils and porous rocks.

Both SMAP-2D and SMAP-3D have especially useful features for earthquake analysis since they can continuously perform the static analysis followed by dynamic analysis with appropriate boundary change.

 

SMAP-2D is the 2-dimensional version which takes account of spherical symmetry, plane strain and axisymmetry configurations. And SMAP-3D is the 3-dimensional Version. The programs can be a useful tool for both research and practicing engineers to study geomechanical response of saturated or partially saturated soils and porous rocks.

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Features of SMAP-S2

• Nonlinear elastoplastic material models for soils and porous rocks include Mohr-Coulomb, Drucker-Prager, Hoek & Brown In Situ Rock Models, Duncan & Chang Hyperbolic Model, Modified Cam Clay Model. JWL Model is available to model the explosive charges.

• Nonlinear flow equation includes both laminar and turbulent flow terms such that at low flow velocity laminar term governs and at high flow velocity, turbulent term governs. The coefficient of permeability can be varied as a function of current porosity.

• Nonlinear compressibility properties of fresh and sea waters are built-in in the programs. For partially saturated porous materials, nonlinear compressibility of the air is explicitly modeled.

• Nonlinear compressibility equation of solid grain is derived based on empirical linear relations between wave velocity and particle velocity.

• Dynamic sources include explosive charges, pressure time histories, velocity time histories, initial velocities and base accelerations.

• Thermal expansion can be considered.

• Transmitting and repeating boundaries can be specified.

• Natural frequencies and mode shapes can be obtained.

• Multi-staged excavation, construction or temporary support can be simulated.

• Implicit or explicit time integration method can be used.

• Joint element allows separation and sliding along the interface. It can be used for modeling rock joints, fault zones, or structure-soil interfaces.

• Truss element allows yielding, buckling and post-buckling. It can be used for rock bolts and anchor bars.

• Beam element allows axial, bending, torsion, and shear deformations.

• Shell element allows bending, torsion, and membrane deformations.

• Programs contain automatic node renumbering scheme to reduce bandwidth.