|Structure Medium Analysis Program|
Static, Consolidation and
Dynamic Analysis for Dry, Saturated and Partially Saturated Soils
and Rock Mass
Both 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
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.
Over a decade, the programs have been
continuously improved based on results of theoretical and
experimental research works. 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
- Deformations, stresses and water flow around
shafts, tunnels and underground waste repositories during
- Slope stability analysis
- Foundations and earth dam consolidations with
prediction of settlements and construction pore pressures.
- Dynamic soil structure analysis subjected to
- Blast-induced liquefactions
- Ground motions due to rock blasting
- Wave propagation
- Shell structures
- 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, and Single Yield Surface Lade
Model. JWL Model is available to model the explosive
- 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
- 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
- Natural frequencies and mode shapes can be
- 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
- Beam element allows axial, bending, torsion,
and shear deformations.
- Shell element allows bending, torsion, and
- Programs contain automatic node renumbering
scheme to reduce bandwidth.
- User friendly input window with detailed
and Load Generation
SMAP programs contain following pre-processors
which make easier for finite element mesh and load generation:
- PRESMAP-2D consists of four different models;
Model 1 for general shapes, Model 2 for near-fields around
underground openings, Model 3 for triangular and rectangular shape
geometry, and Model 4 for layered embankments having slope.
- NATM-2D generates two-dimensional finite
element meshes and boundary conditions for typical NATM
- LOAD-2D generates two-dimensional loads such
as surface tractions, water pressures, specified velocities, etc.
- PRESMAP-GP is the general purpose
pre-processing program which generates line, surface, and volume
elements using rectangular, cylindrical, and polar coordinate
- CROSS-3D generates three-dimensional finite
element meshes and boundary conditions for crossing
- GEN-3D extends typical two-dimensional meshes
to three-dimensional coordinate system.
- LOAD-3D generates three-dimensional loads such
as surface tractions, water pressures, specified velocities,
- ADDRGN combines two different regions
generated by pre-processing programs.
Analysis results are interpreted graphically by
post processing programs (PLTDS, PLTXY and FEMAP)
PLTDS is used for the following 2-D plots:
- Finite element mesh with element or node
- Principal stress distributions
- Deformed shapes/displacement vectors
- Truss axial force/stress/strain
- Beam section force/stress/strain
- Contours of stresses/strains/motions
PLTXY is used for the following time history
- Stress/strain time histories
- Displacement/velocity/acceleration time
FEMAP is used for the following 2-D and 3-D
- Mesh plots
- Arrow or animated deformed shape
- Contour or criterior plot for shell and
- Isosurface plot for 3-D solid element
- Beam or truss Diagram
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