Structure Medium Analysis Program
Static, Consolidation and Dynamic Analysis for Dry, Saturated and Partially Saturated Soils and Rock Mass
Both SMAP2D and SMAP3D are stateoftheart multiphase 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 SMAP2D and SMAP3D have especially
useful features for earthquake analysis since they can continuously
perform the static analysis followed by dynamic analysis with
appropriate boundary change.
SMAP2D is the 2dimensional version which takes
account of spherical symmetry, plane strain and axisymmetry
configurations. And SMAP3D is the 3dimensional Version.
Over the last twenty years, 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
rocks.
Applications

Deformations, stresses and water flow around shafts, tunnels
and underground waste repositories during multistaged construction

Slope stability analysis

Foundations and earth dam consolidations with prediction
of settlements and construction pore pressures

Dynamic soil structure analysis subjected to earthquake loading

Blastinduced liquefactions

Ground motions due to rock blasting

Wave propagation

Shell structures
Features

Nonlinear elastoplastic material models for
soils and porous rocks include MohrCoulomb, DruckerPrager, 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 builtin 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.

Multistaged 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 structuresoil interfaces.

Truss element allows yielding, buckling and postbuckling.
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.
Geometry Modeling and Load Generation
SMAP programs contain following preprocessors
which make easier for finite element mesh and load generation:
 Group Mesh Generator
is a 2dimensional CAD program to build group mesh
which can be used to generate finite element meshes with the aid of program ADDRGN2D.
 Block Mesh Generator
is a 3dimensional CAD program to build block mesh
which can be used to generate finite element meshes with the aid of program PRESMAPGP.
 PRESMAP2D
consists of four different models;
Model 1 for general shapes, Model 2 for nearfields around
underground openings, Model 3 for triangular and rectangular shape
geometry, and Model 4 for layered embankments having slope.
 NATM2D
generates 2dimensional finite element meshes and boundary conditions for typical NATM tunnels.
 CIRCLE2D
generates 2dimensional finite element meshes and boundary conditions for circular sections.
It can model three different options (quarter, half and full sections).
 JOINT2D
generates jointed continuum finite element meshes given continuum SMAP2D mesh file.
 LOAD2D
generates 2dimensional loads such as surface tractions, water pressures, specified velocities, etc.
 PRESMAPGP
is the general purpose preprocessing program which generates line, surface,
and volume elements using rectangular, cylindrical, and polar coordinate systems.
 PRESMAP3D
is the basic preprocessor which can be applied to model various types of 3D geometries.
 CROSS3D
generates 3dimensional finite element meshes and boundary conditions for crossing tunnels.
 PILE3D
generates all input files required for 3dimensional single pile analysis.
It can generate concrete pile with anchor bolts or steel pipe with concrete cap.
 JOINT3D
generates jointed continuum finite element meshes given continuum SMAP3D mesh file.
 INTERSECTION
programs compute the locations of the 3D surfaces crossing each other.
 GEN3D
extends typical twodimensional meshes to threedimensional coordinate system.
 LOAD3D
generates 3dimensional loads such as surface tractions, water pressures, specified velocities, etc.
 ADDRGN
combines two different regions generated by preprocessing programs.
Graphical Output
Analysis results are interpreted graphically by
post processing programs (PLOT2D, PLOTXY and PLOT3D)
PLOT2D is used for the following 2D plots:
 Finite element mesh with element or node numbers
 Principal stress distributions
 Deformed shapes/displacement vectors
 Truss axial force/stress/strain
 Beam section force/stress/strain
 Contours of stresses/strains/motions
PLOTXY is used for the following time history plots:
 Stress/strain time histories
 Displacement/velocity/acceleration time histories
PLOT3D is used for the following 2D and 3D plots:
 Mesh plots
 Deformed shapes
 Beam or truss section forces
 Isosurface plot for 3D solid element
 Principal stress vectors for shell and continuum elements
 Contours for stresses, strains and displacements for shell and continuum elements
©copyright Comtec Research 1998, all rights reserved
