Function
- Import MCT files as well as other types of files.
Call
From the main menu, select [File] > [Import] group > [midas Civil MCT File]
From the main menu, select [File] > [Import] group > [Nodal Results (for MIDAS GTS)]
From the main menu, select [File] > [Import] group > [AutoCAD DXF File]
From the main menu, select [File] > [Import] group > [SAP2000(V6, V7) File]
From the main menu, select [File] > [Import] group > [SAP2000(V8) File]
From the main menu, select [File] > [Import] group > [STAAD2000 File]
From the main menu, select [File] > [Import] group > [STAAD2002 File]
From the main menu, select [File] > [Import] group > [MSC.Nastran File]
From the main menu, select [File] > [Import] group > [Lusas DAT File]
Input
-
MIDAS / Civil MCT File
Import an MCT file (text input file of midas Civil)
-
Nodal Results (for MIDAS GTS)
This function allows users to import multilinear function of Point Spring Support from GTS NX into midas Civil.
-
AutoCAD DXF File
Import an AUTOCAD DXF file.
1. Layer classification
Only the layers that represent the shape of the structure can be selected and incorporated into the modeling. Even in a drawing that includes dimension lines, details, etc., the model can be created without any separate modifications.
2. Importing points and surfaces
Lines and surfaces can be imported. Lines are imported as beams, and surfaces are imported as plates.
3. Importing polyline as plate elements
Polyline that forms triangles or quadrangles is considered as a line, but it is imported as a plate element.
4. Import error handling
When importing an DXF file, models can be generated by layers.
Even in case of element shape errors (e.g., overlapping nodes) during DXF file import, the import can be executed as the program is ignoring the parts with errors. In the message window, the following error messages will display. "[WARNING] Invalid Node (No.XX) is skipped!", "[WARNING] Invalid Element (No.XX) is skipped!"
Polyline cannot be imported. Split a Polyline into Lines.
Various polyline types, such as polygon, triangle, rectangle, etc., can be imported to midas Civil as plate elements in .DXF format, where plate elements are imported as thick type (without drilling DOF)
-
SAP2000 (V6, V7) File
Convert a fn.s2k file (SAP2000 data file) into an MCT text input file of midas Civil. The fn.s2k file is created by *.s2k Export in SAP2000.
The limitations of converting a SAP2000 file into a midas Civil data file are as follows
SAP2000 command | Detail command | Conversion | Limitation | midas Civil function |
---|---|---|---|---|
System | DOF | O | - | STRUCTURE TYPE |
LENGTH, FORCE | O | - | UNIT SYSTEM | |
CYC | O | Converted into Static Analysis in the case of Harmonic Steady-State Analysis | - | |
COORDINATE | - | O | - | - |
JOINT | - | O | - | NODES TABLE |
LOCAL | ANG | O | - | NODE LOCAL AXIS |
AXVEC, PLVEC | O | - | NODE LOCAL AXIS | |
RESTRAINT | - | O | - | SUPPORTS |
CONSTRAINT (1) | - | O | - | RIGID LINK |
WELD | - | X | - | - |
PATTERN | - | O | - | - |
SPRING | - | O | - | - |
MASS | - | O | - | - |
MATERIAL (2) | Isotropic | O | - | MATERIAL |
Orthotropic | O | Only one axis converted | MATERIAL | |
Anisotropic | O | Only one axis converted | MATERIAL | |
FRAME SECTION (3) | Prismatic R, P, B, C, T, A, I, L, 2L Shape Section | O | - | SECTION |
Prismatic General Section | O | - | SECTION | |
Prismatic Database Section | X | - | - | |
Nonprismatic Section | O | - | SECTION | |
SHELL SECTION | - | O | - | THICKNESS |
NLPROP (4) | - | O | - |
POINT SPRING SUPPORTS ELASTIC LINK |
FRAME | GEN, DEL | O | - | ELEMENT TABLE |
LOCAL, ANG, PLVEC | O | - | ELEMENT TABLE | |
IOFF, JOFF | O | - | BEAM END OFFSETS | |
RIGID (5) | O | Converted into 1.0 for a value other than 1.0 | BEAM END OFFSETS | |
IREL, JREL | O | - | BEAM END RELEASE | |
SHELL | GEN, DEL | O | - | ELEMENT TABLE |
PLVEC, ANG | X | - | - | |
PLANE | GEN, DEL | O | - | ELEMENT TABLE |
3, 4 Node element | O | - | ELEMENT TABLE | |
9 Node element | X | - | - | |
MATANG | X | - | - | |
ASOILD | GEN, DEL | O | - | ELEMENT TABLE |
3, 4 Node element | O | - | ELEMENT TABLE | |
9 Node element | X | - | - | |
MATANG, ARC | X | - | - | |
SOILD | GEN, DEL | O | - | ELEMENT TABLE |
6, 8 Node element | O | - | ELEMENT TABLE | |
MATANG | X | - | - | |
NLLINK (6) | 1 Node element | O | - | POINT SPRING SUPPORTS |
2 Node element | O | - | ELASTIC LINK | |
MATTEMP | - | X | - | - |
RETTEMP | - | O | - | - |
PRESTRESS | - | O | - | PRESTRESS BEAM LOAD |
LOAD | FORCE | O | - | NODAL LOAD |
RESTRAINT DISPLACEMENT |
O | - | SPECIFIED DISPLACEMENTS OF SUPPORTS | |
SPRING DISPLACEMENT |
O | midas does not have a corresponding command. Converted into Specified Displacement at the closest support. | SPECIFIED DISPLACEMENTS OF SUPPORTS | |
GRAVITY (Beam) |
O | - | ELEMENT BEAM LOADS | |
GRAVITY (Shell) |
O | - | PRESSURE LOADS | |
GRAVITY (Plane / Asoild / Soild) | X | - | - | |
CONCENTRATED SPAN | O | - | ELEMENT BEAM LOADS | |
DISTRIBUTED SPAN | O | - | ELEMENT BEAM LOADS | |
PRESTRESS | O | - | PRESTRESS BEAM LOADS | |
UNIFORM | O | - | PRESSURE LOADS | |
SURFACE PRESSURE | O | - | PRESSURE LOADS | |
PORE PRESSURE | X | - | - | |
TEMPERATURE | O | - |
ELEMENT TEMPERATURES TEMPERATURE GRADIENT |
|
ROTATE | X | - | - | |
PDFORCE | - | O | - | INIFORCE |
PDELTA | - | O | - | P-DELTA ANALYSIS CONTROL |
MODES | N, CUT, TOL | O | - | EIGENVALUE ANALYSIS CONTROL |
RITZ | O | - | EIGENVALUE ANALYSIS CONTROL | |
SHIFT | X | - | - | |
NLLINK | X | - | - | |
FUNCTION | - | O | If a file is used for FUNCTION, the file must be in the same folder, which contains *.2k. |
RESPONSE SPECTRUM FUNCTIONS TIME FORCING FUNCTIONS |
SPEC | NAME, ANG, DAMP, F1, F2, DIRF, MODC (CQC, SRSS, ABS) | O | - | RESPONSE SPECTRUM FUNCTIONS |
MODC (GMC) | X | - | - | |
HISTORY | Linear Transient / Periodic Analysis | O | - | TIME HISTORY LOAD CASES |
Nonlinear Transient Analysis | X | - | - | |
Acceleration Data | O | - | TIME VARYING STATIC LOADS | |
Load Data (7) | O | - | DYNAMIC NODAL LOADS | |
LANE | - | O | - | TRAFFIC LINE LANES |
VEHICLE | DB Vechicle | O | - | VEHICLES |
User Define Vechicle | O | Converted into DB24 vehicle load & a warning issued. | VEHICLES | |
VEHICLE CLASS | - | O | - | VEHICLES CLASSES |
BRIDGE REPONSE | - | X | - | - |
MOVING LOAD | NAME, RF, CLASS, LANE, LMIN, LMAX, SF | O | - | MOVING LOAD CASES |
CALC | O | - | MOVING LOAD ANALYSIS | |
TOL, SET | X | - | - | |
COMBO | - | O | - | COMBINATIONS |
-
SAP2000 (V8) File (Nonlinear) Import
Target File: Unmodified *.s2k file created by Export in SAP2000(V8) can be converted.
The limitations of converting a SAP2000 (V8) file into a midas Civil data file are as follows:
Contents | Table | Conversion | midas Civil | Remarks |
---|---|---|---|---|
Joint | Summary-Joint Assingments | O | - | |
Joint Coordinates | O | NODE | ||
Joint Restraint Assignments | O | CONSTRAINT | ||
Joint Local Axes Assignments 1 Typical | O | LOCALAXIS | ||
Joint Local Axes Assignments 2 Advanced | O | LOCALAXIS | ||
Joint Pattern Assignments (1) | O | - | ||
Joint Pattern Definitions (1) | O | - | ||
Joint Spring Assignments 1 Uncoupied | O | SPRING | ||
Joint Spring Assignments 2 coupied | O |
GSPRING GSPRTYPE |
||
Joint Panel Zone Assignments | X | N/A | ||
Frame | Summary-Frame Assignments | O | - | |
Connectivity-Frame/Cable | O | ELEMENT | ||
Frame Cable Assignments | X | - | ||
Frame Design Procedures | X | - | ||
Frame Insertion Point Assignments | O | SECTION | ||
Frame Local Axes Assigments 1 Typical | O | ELEMENT | ||
Frame Local Axes Assignments 2 Advanced | O | ELEMENT | ||
Frame Material Temperatures | X | N/A | ||
Frame NL Hinge Assignments | X | - | ||
Frame Offset Along Length Assignments (2) | O | OFFSET | ||
Frame Output Station Assignments | X | N/A | ||
Frame P-Delta Force Assignments | O | INFORCE | ||
Frame Prestress 1 Patterns | O | PRESTRESS | ||
Frame Prestress 2 Load Multipliers | O | PRESTRESS | ||
Frame Property Modifiers | O | SECT-SCALE | ||
Frame Reference Temperatures | O | ELTEMPER | ||
Frame Release Assignments 1 General (3) | O | FRAME-RLS | ||
Frame Release Assignments 2 Partial Fixity (3) | △ | FRAME-RLS | ||
Frame Spring Assignments (4) | △ | SPRING | ||
Frame Auto Subdivision Assignments | X | N/A | ||
Frame Tension And Compression Limits | X | - | ||
Area | Summary Area Assignments | O | - | |
Connectivity Area (5) | O | ELEMENT | ||
Area Auto Mesh Assignments | X | N/A | ||
Area Local Axes Assignments 1 Typical (6) | X | Undefined | ||
Area Local Axes Assignments 2 Advanced (6) | X | Undefined | ||
Area Material Temperatures | X | N/A | ||
Area Reference Temperatures | O | ELTEMPER | ||
Area Spring Assignments (5) | △ | SPRING | ||
Soild | Summary Soild Assignments | O | - | |
Connectivity Soild | O | ELEMENT | ||
Soild Local Axes Assignments 1 Typical (6) | X | Undefined | ||
Soild Local Axes Assignments 2 Advanced (6) | X | Undefined | ||
Soild Material Temperatures | X | N/A | ||
Soild Property Assignments | X | N/A | ||
Soild Property Definitions | X | N/A | ||
Soild Reference Temperatures | O | ELTEMPER | ||
Soild Spring Assigments (4) | X | Undefined | ||
Soild Auto Mesh Assignments | X | N/A | ||
Link | Summary Link Assigments | O | - | |
Connectivity Link | O |
ELASTICLINK NL-LINK |
||
Link Local Axes Assignments 1 Typical | O |
ELASTICLINK NL-LINK |
||
Link Local Axes Assignments 2 Advanced | O |
ELASTICLINK NL-LINK |
||
Link Property Definitions 01 General | O | NL-PROP | ||
Link Property Definitions 02 Linear | O | NL-PROP | ||
Link Property Definitions 03 MultiLinear | X | N/A | ||
Link Property Definitions 04 Damper | O | NL-PROP | ||
Link Property Definitions 05 Gap | O | NL-PROP | ||
Link Property Definitions 06 Hook | O | NL-PROP | ||
Link Property Definitions 07 Rubber Isolator | O | NL-PROP | ||
Link Property Definitions 08 Sliding Isolator | O | NL-PROP | ||
Link Property Definitions 09 Plastic (Wen) | O | NL-PROP | ||
Link Property Definitions 10 Plastic (Kinematic) | X | N/A | ||
Link Property Assignments | O | NL-PROP | ||
Program Control | O | UNIT | ||
Material | Material Properties 1 General | O | MATERIAL | |
Material Properties 2 Advanced | △ | MATERIAL | Anisotropic | |
Material Properties 3 Design Steel | X | - | ||
Material Properties 4 Design Concrete | X | - | ||
Material Properties 5 Design Aluminum | X | - | ||
Material Properties 6 Design ColdFormed | X | - | ||
Section | Frame Section Assignments | O | SECTION | |
Frame Seciton Properties 1 General | O |
SECTION SECT-SCALE |
||
Frame Section Properties 2 Concrete | X | - | ||
Frame Section Properties 3 Concrete Beam | X | - | ||
Frame Section Properties 4 Auto Select | X | - | ||
Frame Section Properties 5 Nonprismatic | △ | SECTION | Sect. SCALE | |
Thickness | Area Section Properties | O | THICKNESS | |
Area Stiffness Modifiers | X | N/A | ||
Static Load Case | Joint Loads - Force | O | CONLOAD | |
Joint Loads - Ground Displacement |
O |
SPDISP |
|
|
Frame Loads - Distributed |
O |
BEAMLOAD |
|
|
Frame Loads - Gravity (7) |
O |
BEAMLOAD |
SelfModifier |
|
Frame Loads - Point |
O |
BEAMLOAD |
|
|
Frame Loads - Temperature (8) |
O |
ELTEMPER THERGRAD NDTEMPER |
Joint Pattern |
|
Area Loads - Gravity (7) |
O |
PRESSURE |
SelfModifier |
|
Area Loads - Pore Pressure |
X |
N/A |
|
|
Area Loads - Rotate |
X |
N/A |
|
|
Area Loads - Surface Pressure |
O |
- |
|
|
Area Loads - Temperature (8) |
O |
ELTEMPER THERGRAD |
|
|
Area Loads - Uniform To Frame |
X |
Lack of Data |
FLOADTYPE FLOORLOAD |
|
Area Loads - Uniform |
O |
PRESSURE |
Joint Pattern |
|
Area Loads - Wind Pressure Coefficients |
X |
Undefined |
|
|
Solid Loads - Gravity (7) |
X |
Undefined |
SelfModifier |
|
Solid Loads - Pore Pressure |
X |
N/A |
|
|
Solid Loads - Surface Pressure |
X |
Undefined |
|
|
Solid Loads - Temperature (8) |
O |
ELTEMPER THERGRAD |
|
|
Link Loads - Gravity (7) |
X |
N/A |
|
|
Case - Static 1 - Load Assignments |
O |
STLDCASE |
|
|
Load Case Definitions |
O |
STLDCASE |
|
|
Moving Load Case |
Bridge Loads 1 - Lane Definitions |
O |
LINELANE |
Both Independent |
Bridge Loads 2 - Standard Vehicles |
O |
VEHICLE |
|
|
Bridge Loads 3 - General Vehicles 1 |
O |
VEHICLE |
|
|
Bridge Loads 4 - General Vehicles 2 |
O |
VEHICLE |
|
|
Bridge Loads 5 - Vehicle Classes |
O |
VCLASS |
|
|
Bridge Loads 6 - Bridge Response |
O |
MOVE-CTRL |
|
|
Case - Moving Load 1 - Lane Assignments |
O |
MVLDCASE |
|
|
Case - Moving Load 2 - Lanes Loaded |
O |
MVLDCASE |
|
|
Case - Moving Load 3 - MultiLane Factors |
O |
MVLDCASE |
|
|
Eigen Value Problem |
Combination Definitions |
O |
LOADCOMB |
Load Case |
Masses 1 - Mass Source |
O |
LOADTOMASS |
|
|
Masses 2 - Assembled Joint Masses |
X |
Generate after analysis |
|
|
Joint Added Mass Assignments |
O |
NODALMASS |
|
|
Frame Added Mass Assignments (9) |
O |
NODALMASS |
|
|
Area Added Mass Assignments (9) |
O |
NODALMASS |
|
|
Case - Modal 1 - General |
O |
EIGEN-CTRL |
|
|
Case - Modal 2 - Load Assignments - Eigen |
X |
N/A |
|
|
Case - Modal 3 - Load Assignments - Ritz |
O |
EIGEN-CTRL |
|
|
Response Spectrum Analysis |
Function - Response Spectrum - BOCA96 |
X |
N/A |
|
Function - Response Spectrum - EuroCode8 |
O |
SFUNCTION |
|
|
Function - Response Spectrum - From File |
X |
N/A |
|
|
Function - Response Spectrum - IBC2000 |
O |
SFUNCTION |
|
|
Function - Response Spectrum - NBCC95 |
O |
SFUNCTION |
|
|
Function - Response Spectrum - NEHRP97 |
X |
N/A |
|
|
Function - Response Spectrum - NZS4203 |
X |
N/A |
|
|
Function - Response Spectrum - UBC94 |
O |
SFUNCTION |
|
|
Function - Response Spectrum - UBC97 |
O |
SFUNCTION |
|
|
Function - Response Spectrum - User |
O |
SFUNCTION |
|
|
Case - Response spectrum 1 - General (10) |
O |
SPEC-CTRL SPLDCASE |
|
|
Case - Response spectrum 2 - Load Assignments (10) |
O |
SPLDCASE |
|
|
Case - Response spectrum 3 - Interpolated Damping |
X |
N/A |
|
|
Case - Response spectrum 4 - Proportional Damping |
X |
N/A |
|
|
Case - Response spectrum 5 - Damping Overrides |
X |
N/A |
||
Analysis |
Analysis Case Definitions |
O |
ANAL-CTRL |
|
Active Degrees of Freedom |
O |
STRUCTYPE |
|
|
Case - Static 2 - Nonlinear Load Application |
X |
N/A |
|
|
Case - Static 3 - Nonlinear Stage Information |
X |
Lack of Data |
STAGE |
|
Case - Static 4 - Nonlinear Parameters |
X |
Lack of Data |
STAGE NONL-CTRL |
|
Case - Direct History 1 - General (11) |
O |
THLDCASE |
|
|
Case - Direct History 2 - Load Assignments |
O |
GROUND-ACC DYN-SLOAD |
|
|
Case - Direct History 3 - Proportional Damping |
O |
THLDCASE |
|
|
Case - Direct History 4 - Integration Parameters |
X |
N/A |
|
|
Case - Direct History 5 - Nonlinear Parameters |
O |
THLDCASE |
|
|
Case - Modal History 1 - General |
O |
THLDCASE |
|
|
Case - Modal History 2 - Load Assignments |
O |
GROUND-ACC DYN-SLOAD |
|
|
Case - Modal History 3 - Interpolated Damping |
X |
N/A |
|
|
Case - Modal History 4 - Proportional Damping |
O |
THLDCASE |
|
|
Case - Modal History 5 - Damping Overrides |
O |
THLDCASE |
|
|
Case - Modal History 6 - Nonlinear Parameters |
O |
THLDCASE |
|
|
Case - Buckling 1 - General (12) |
O |
BUCK-CTRL |
|
|
Case - Buckling 2 - Load Assignments |
O |
BUCK-CTRL |
|
|
Case - Steady State 1 - General |
X |
|
|
|
Case - Steady State 2 - Load Assignments |
X |
|
|
|
Rigid Link |
Joint Constraint Assignments (13) |
O |
RIGIDLINK |
|
Constraint Definitions - Beam |
△ |
RIGIDLINK |
Auto Axes |
|
Constraint Definitions - Body |
O |
RIGIDLINK |
|
|
Constraint Definitions - Diaphragm |
△ |
RIGIDLINK |
Auto Axes |
|
Constraint Definitions - Equal |
O |
RIGIDLINK |
|
|
Constraint Definitions - Line |
O |
RIGIDLINK |
|
|
Constraint Definitions - Local |
X |
N/A |
|
|
Constraint Definitions - Plate |
△ |
RIGIDLINK |
Auto Axes |
|
Constraint Definitions - Rod |
△ |
RIGIDLINK |
Auto Axes |
|
Constraint Definitions - Weld |
O |
RIGIDLINK |
|
|
Lateral Load (Wind) |
Auto Wind - ASCE7-88 |
X |
N/A |
|
Auto Wind - ASCE7-95 |
X |
N/A |
|
|
Auto Wind - ASCE7-98 |
O |
WIND |
|
|
Auto Wind - BOCA96 |
X |
N/A |
|
|
Auto Wind - BS6399-95 |
X |
WIND |
|
|
Auto Wind - NBCC95 |
O |
WIND |
|
|
Auto Wind - UBC94 |
X |
N/A |
|
|
Auto Wind - UBC97 |
O |
WIND |
|
|
Auto Wind - User |
X |
N/A |
|
|
Auto Wind Exposure For Horizontal Diaphragms |
X |
N/A |
|
|
Auto Wind Loads To Groups |
X |
N/A |
|
|
Auto Wind Loads To Horizontal Diaphragms |
X |
N/A |
|
|
Auto Wind Loads To Joints |
X |
N/A |
||
Lateral Load (Seismic) |
Auto Seismic - BOCA96 |
X |
N/A |
|
Auto Seismic - IBC2000 |
X |
Lack of Data |
Seismic Group |
|
Auto Seismic - NBCC95 |
O |
SEIS |
|
|
Auto Seismic - NEHRP97 |
X |
N/A |
|
|
Auto Seismic - UBC94 |
X |
N/A |
|
|
Auto Seismic - UBC97 |
O |
SEIS |
|
|
Auto Seismic - UBC97 Isolated |
X |
N/A |
|
|
Auto Seismic - User Coefficient |
X |
N/A |
|
|
Auto Seismic - User Loads |
X |
N/A |
|
|
Auto Seismic Eccentricity Overrides |
X |
N/A |
|
|
Auto Seismic Loads To Groups |
X |
N/A |
|
|
Auto Seismic Loads To Horizontal Diaphragms |
X |
N/A |
|
|
Auto Seismic Loads To Joints |
X |
N/A |
|
|
Time History Functions |
Function - Time History - Cosine |
X |
N/A |
|
Function - Time History - From File |
O |
TFUNCTION |
|
|
Function - Time History - Ramp |
X |
N/A |
|
|
Function - Time History - Sawtooth |
X |
N/A |
|
|
Function - Time History - Sine |
X |
N/A |
|
|
Function - Time History - Triangular |
X |
TFUNCTION |
|
|
Function - Time History - User |
O |
N/A |
|
|
Function - Time History - User Periodic |
X |
N/A |
||
Group |
Groups 1 - Definitions |
X |
- |
|
Groups 2 - Assignments |
X |
Lack of Data |
GROUP BNDR-GROUP |
|
Groups 3 - Masses and Weights |
X |
- |
|
<Commentary>
1. JOINT PATTERN
(1) For the present, it is applied to Element Temperature Load, Temperature Gradient and Area Surface Load.
2. BEAM END OFFSET
(1) No Rigid Factor function (Converted into Fully Rigid Offset)
3. BEAM END RELEASE
(1) SAP inputs Partial Fixity as Stiffness whereas MIDAS inputs it as Proportion in the case of Frame Release. (Converted into Full Fixity)
4. ELEMENT SPRING
(1) Frame Spring Assignment: Converted into Node Spring
(2) Area Spring Assignment: Converted into Node Spring (only in the case of face#5 and #6 (∵local axes))
(3) Solid Spring Assignment: Not converted since local axes are not defined
5. AREA ELEMENT
SAP2000 Ver. 8.0.8 | midas Civil | Remark | |||
Section Type | Sub Type | Element | Type | ||
Shell | Shell | Thick | Plate (5-1) | Thick | |
Thin | Thin | ||||
Membrane | Plane Stress (5-2) | ||||
Plate | Thick | Plate | Thick | Consistent Element Properties | |
Thin | Thin | ||||
Plane | Stress | Plane | Thick | Consistent Element Properties | |
Strain | Thin | ||||
Asoild | Axisymmetric | Consistent Element Properties |
5-1. In SAP 2000, Shell-Shell Element is the combination of Shell-Membrane Element and Shell-Plate Element, and the element has both translational and rotational degrees of freedom in ECS (element coordinate system) x, y, and z directions. In MIDAS/Gen, however, since there is no corresponding element to Shell-Shell Element of SAP 2000, it is converted into Plate Element.
5-2. In SAP 2000, Shell-Membrane Element has translational degrees of freedom in two in-plane directions and a rotational degree of freedom (drilling moment) perpendicular to the plane. As the counterpart of MIDAS/Gen, Wall-Membrane Element may be used.
But it has a limitation in that the nodes of Wall-Membrane Element have to be connected counterclockwise starting from the bottom left and the element must be parallel to the Global Z-axis. Due to the limitations, the Shell-Membrane Element of SAP2000 is replaced with the Plane-Stress Element of MIDAS, which has only translational degrees of freedom in two in-plane directions.
6. LOCAL AXES
(1) Area Local Axes : SAP - default : Identical to GLOBAL Axes / MIDAS - default : Local Axes are defined by the sequence of nodes
SAP (Default : GLOBAL) | MIDAS | |
Ex (1) |
Face # 1 |
Face # 1 |
Ex (2) |
Face # 1 |
Face # 1 |
7. GRAVITY LOAD
(1) Frame : Converted into Element Beam Load (*if self modifier > 0, self weight is applied)
(2) Area : Converted into Pressure Load (in the direction of Global Axes of face#5, #6 since local axes are not defined)
(3) Solid : Not converted since local axes are not defined
8. TEMPERATURE LOAD
(1) Frame Temperature Load : It is converted into Nodal Temperature if Joint Pattern exists. The average of Joint Pattern is converted into Element Temperature Load.
(2) Frame Temperature Gradient : Neglect Pattern if Joint Pattern exists.
(3) Area Temperature load : It is converted into Nodal Temperature if Joint Pattern exists. The average of Joint Pattern is converted into Element Temperature Load.
(4) Area Temperature Gradient : Neglect Pattern if Joint Pattern exists.
(5) Solid Temperature Load : It is converted into Nodal Temperature if Joint Pattern exists. The average of Joint Pattern is converted into Element Temperature Load.
9. ADDED MASS
(1) Frame added mass -> Converted into Nodal Mass
(2) Area Added mass -> Converted into Nodal Mass
10. RESPONSE SPECTRUM ANALYSIS CONTROL
(1) In SAP, it is possible to assign Analysis Control for each Response Spectrum Load Case. However, in MIDAS, only one Analysis Control can be assigned, so the first Analysis Control is converted.
11. When Direct Integration Analysis Method is used in Time History Load Case, only Newmark method's parameter can be converted.
12. Buckling Analysis Control
(1) In SAP, it is possible to assign Analysis Control for each Response Spectrum Load Case. However, in MIDAS, only one Analysis Control can be assigned, so the first Analysis Control is converted.
(2) It is converted only when Load Type is "Load Case" in SAP.
13. RIGID LINK
(1) Master node is assigned to the first Slave node.
(2) In case of Diaphragm and Plate, node (center of mass) which considered mass is assigned to the Master node.
(3) Beam, Diaphragm, Plate, Rod : They are not converted after processing Auto Axis Message.
14. etc.
(1) Section Offset and Beam End Offset cannot be taken into account simultaneously, and Global Type and Element Type of Beam End Offset cannot be taken into account simultaneously.
(2) Frame Auto Subdivision - Not converted.
(3) Area Auto Mesh - Not converted.
-
STAAD 2000&2002 File
Convert a fn.std file (STAAD data file) into an MCT text input file of midas Civil.
The limitations of converting a STAAD file into a midas Civil data file are as follows.
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
Unit |
- |
O |
Converted into Neutral Unit System (Newton, Meter) |
*UNIT |
Joint Coordinate |
JOINT |
O |
- |
*NODE |
JOINT |
X |
To be updated in a Future Version |
||
REPEAT |
O |
- |
||
REPEAT ALL |
O |
- |
||
Member Incidence |
MEMBER INCIDENCE |
O |
If SHELL and SOLID have the same ID, it prints out a warning message, reassigns IDs to them and then converts them. |
*ELEMENT |
REPEAT |
O |
|||
REPEAT ALL |
O |
|||
Element Incidence (Shell) |
ELEMENT INCIDENCE (SHELL) |
O |
If MEMBER and SOLID have the same ID, it prints out a warning message, reassigns IDs to them and converts them. |
*ELEMENT |
REPEAT |
O |
|||
REPEAT ALL |
O |
|||
Element Incidence Solid |
ELEMENT INCIDENCE SOLID |
O |
If MEMBER and SHELL have the same ID, it prints out a warning message, reassigns IDs to them and then converts them. |
*ELEMENT |
REPEAT |
O |
|||
REPEAT ALL |
O |
|||
Element Mesh Generation |
- |
X |
- |
- |
Redefined of |
- |
X |
- |
- |
Groups |
GEOMETRY |
O |
Nodes and Elements with corresponding IDs Convert into the MIDAS GROUP Command. |
*GROUP |
JOINT |
O |
- |
||
MEMBER |
O |
- |
||
ELEMENT |
O |
- |
||
SOLID |
O |
- |
||
Rotate of Structure Geometry |
- |
X |
- |
- |
Inactive/Delete Specification |
- |
X |
- |
- |
Start User Table |
External File Name |
X |
User Section Table using files is not converted. |
- |
TYPE |
O |
- |
*SECTION | |
NAME |
O |
- |
||
PROPERTY |
O |
- |
||
Member Properties |
DB Section |
|
Only AISC DB can be converted |
- |
PRISMATIC |
O |
Converted into Value Type if Property (AX, AY, AZ, IX, IY, and IZ) is present.
|
*SECTION |
|
TAPERED |
O |
- |
||
UPTABLE |
O |
User Table input using files is not converted |
||
ASSIGN |
X |
Cannot convert into a command that automatically assigns sections after analysis and design.
|
- |
|
Element Properties |
- |
O |
Only f1 is converted. |
*THICKNESS |
Define Material |
E, G, POISSON, DENSITY, ALPHA |
O |
Only Material used in CONSTANT Command is converted after arbitrary Material Name and IDs are assigned. |
*MATERIAL |
DAMPING,CDAMP |
X |
- |
||
Constant |
E, G, POISSON, DENSITY, ALPHA |
O |
Only Material used in CONSTANT Command is converted after arbitrary Material Name and IDs are assigned.
Converted into values if CONCRETE, STEEL and ALUMINUM are used. |
*MATERIAL |
CDAMP |
X |
- |
|
|
BETA, REF, REFJT |
O |
- |
|
|
Member Truss |
- |
O |
- |
*ELEMENT |
Member Cable |
- |
O |
- |
*ELEMENT |
Member Tension |
- |
O |
- |
*ELEMENT |
Member Compression |
- |
O |
- |
*ELEMENT |
Element Plane Stress(1) |
- |
O |
ELEMENT TYPE is assigned as Plane Stress. |
*ELEMENT |
Element Ignore (Inplane Rotation)(1) |
- |
O |
- |
*ELEMENT |
Support |
INCLINED |
X |
To be updated |
- |
FOOTING |
X |
- |
- |
|
ELASTIC MAT |
X |
- |
- |
|
FX, FY, FZ, MX, FY, MZ |
O |
- |
*CONSTRAINT |
|
KFX, KFY, KFZ, KMX, KMY, KMZ |
O |
- |
*SPRING |
|
Member Offsets |
LOCAL |
X |
- |
- |
GLOBAL |
O |
Converted into DB24 vehicle load & a warning issued. |
*OFFSET |
|
Member Release |
Partial Moment Release |
X |
- |
- |
Release other than Partial Moment |
O |
- |
*FRAME-RLS |
|
Master / Slave |
- |
O |
Not converted when slave nodes are assigned using XRANGE, YRANGE and ZRANGE (to be upgraded). |
*RIGIDLINK |
Loading |
- |
O |
MIDAS uses Name for defining load cases. "LDC Load Case Numbers" define the names of converted load cases. |
*STLDCASE |
Joint Load |
- |
O |
- |
*CONLOAD |
Member Load |
UNI or UMOM |
O |
f4 value (Perpendicular distance from the member shear center to the plane of loading) is not converted.
|
*BEAMLOAD |
CON or CMOM |
O |
*BEAMLOAD |
||
LIN |
O |
*BEAMLOAD |
||
TRAP |
O |
*BEAMLOAD |
||
Element Load |
PRESSURE |
O |
Element Concentrated Load prepared with the input of only x1 and y1 is not converted.
|
*PRESSURE |
TRAP |
O |
- |
*PRESSURE |
|
Area Load |
- |
X |
- |
- |
Floor Load |
- |
X |
- |
- |
Prestress Load |
PRESTRESS |
O |
- |
*PRESTRESS |
POSTSTRESS |
||||
Fixed End Load |
- |
X |
- |
- |
Support Displacement |
- |
O |
- |
*SPDISP |
TEMPERAURE LOAD |
- |
X |
- |
|
SELFWEIGHT |
- |
O |
- |
*SELFWEIGHT |
SPECTRUM |
- |
X |
To be updated |
|
TIME LOAD |
- |
X |
To be updated |
|
REPEAT LOAD |
- |
X |
|
|
LOAD GENERATION |
- |
X |
|
|
UBC LOAD |
- |
X |
|
|
WIND LOAD |
- |
X |
|
|
CALCULATE NATURAL |
- |
X |
To be updated |
|
MODAL |
- |
X |
To be updated |
|
LOAD COMBINATION |
Linear Combination |
O |
- |
*LOADCOMB |
SRSS |
O |
If LOAD CASE Number is a negative number, SRSS and Linear Combination coexist.
In such a case, SRSS Combination and Linear Combination are created as separate LOAD COMBINATIONs (LCBSRSS and LCBADD) respectively, and then they become Sub Combinations of a NEW COMBINATION. |
-
NASTRAN File
Nastran data files are converted to text files (MCT file) of Civil and interpreted. FEAMAP file is required to accurately convert the files. The unit system is converted to a kgf, m, and there are several limitations imposed in converting process.
User defined coordinate(1)
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
CORD1R |
- |
O |
- |
- |
CORD2R |
- |
O |
- |
- |
CORD1C |
- |
O |
- |
- |
CORD2C |
- |
O |
- |
- |
CORD1S |
- |
O |
- |
- |
CORD2S |
- |
O |
- |
- |
Node(2)
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
GRID |
- |
O |
- |
NODE |
GRIDB |
- |
X |
"Grid point location on boundary of axisymmetric fluid problem" does not exist in MIDAS Civil. |
- |
Element
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
Line Elements(3) |
||||
CBAR |
EID,PID,GA,GB, X1,X2,X3 |
O |
Only PDI values can be converted, and PBAR data cannot be converted. |
ELEMENT (Beam) |
PA,PB, W1A,W2A,W3A, W1B,W2B,W3B |
X |
To be updated |
- |
|
CBEAM |
EID,PID,GA,GB X1,X2,X3 |
O |
Only PID values can be converted, and PBEAM data cannot be converted. |
ELEMENT (Beam) |
BIT,PA,PB, W1A,W2A,W3A, W1B,W2B,W3B, SA,SB |
X |
To be updated |
- |
|
CBEND |
- |
X |
Curved elements can not be converted. |
- |
CONROD |
EID,G1,G2,MID, A,J,C |
O |
Only MID values can be converted, and MAT data cannot be converted. · Need to create a new section, using A,J,C values. · To be updated |
ELEMENT (Truss) |
NSM |
X |
- |
- |
|
CROD |
EID,PID,G1,G2 |
O |
Only PID values can be converted, and PBEAM data cannot be converted. |
ELEMENT (Truss) |
CTUBE |
EID,PID,G1,G2 |
O |
Only PID values can be converted, and PBEAM data cannot be converted. |
ELEMENT (Beam) |
Surface Elements |
||||
CTRIA3, CTRIARR |
EID,PID,G1,G2, G3 |
O |
- |
ELEMENT (Beam) (Plane stree, Plate) |
THETA or MCID, ZOFFS, T1,T2,T3 |
X |
- |
- |
|
CTRIA6 |
- |
O |
Convert to elements with 3 nodes. |
- |
CQUAD4, CQUADR |
EID,PID,G1,G2, G3,G4 |
O |
- |
ELEMENT (Beam) (Plane stree, Plate) |
THETA or MCID, ZOFFS, T1,T2,T3 |
X |
- |
- |
|
CQUAD |
- |
X |
Plane Strain Element(4) |
- |
CQUAD8 |
- |
O |
Convert to elements with 4 nodes. |
- |
CHSEAR |
- |
X |
Not existing in Civil |
- |
CCONEAX, CTRIAX6, CTRIAX, CQUADX |
- |
X |
Axisymmetric Elements(5) |
- |
Solid Elements |
||||
CTETRA |
EID,PID, G1-G10 |
O |
Convert considering only G1 to G4, Elements with more than theses are converted to 4 node elements. |
ELEMENT (Soild) |
CPENTA |
EID,PID, G1-G15 |
O |
Convert considering only G1 to G6, Elements with more than theses are converted to 6 node elements. |
ELEMENT (Soild) |
CHEXA |
EID,PID, GA-G20 |
O |
Convert considering only G1 to G8, Elements with more than theses are converted to 8 node elements. |
ELEMENT (Soild) |
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
Elastic Scalar Elements |
||||
CELAS1(6) |
EID,PID,G1, C1,G2,C2 |
O |
- |
ELASTICLINK SPRING |
CELAS2 |
EID,K,G1, C1,G2,C2 |
O |
- |
ELASTICLINK SPRING |
GE,S |
X |
- |
- |
|
CELAS3 CELAS4 |
- |
- |
It is "Scalar Spring Connection to Scalar Points Only". "Scalar Points" is not considered, therefore can not be converted. |
- |
Rigid Elements |
||||
RBE2 |
EID,GN,CM,GMi |
O |
- |
RIGIDLINK |
RBAR RBE1 RBE3 RROD |
- |
X |
- |
- |
Section Properties
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
PBAR |
PID,MID,A,I1,I2,J, K1,K2 |
O |
Converted to Value Section in midas Civil |
SECTION |
NSM,Ci,Di,Ei, Fi,I12 |
X |
- |
- |
|
PBEAM(7) |
PID,MIDl,A(A,B), I1(A,B),I2(A,B), J(A,B),K1,K2 |
O |
- |
SECTION |
NSM(A,B),C1(A,B), C1(A,B),D1(A,B), D2(A,B),E1(A,B), E2(A,B), F1(A,B), F2(A,B),S1,S2, NSI(A,B),CW(A,B), M1(A,B),M2(A,B), N1(A,B),N2(A,B) |
X |
- |
- |
|
PROD |
PID,MID,A,J,C |
O |
- |
SECTION |
NSM |
X |
- |
- |
|
PTUBE(8) |
PID,MID,OD,T,OD2 |
O |
- |
SECTION |
NSM |
X |
- |
- |
|
PSHELL(9) |
PID,MID1,T |
O |
- |
THICKNESS |
MID2,12I/T**3, MID3,TS/T,NSM, Z1,Z2,MID4 |
X |
- |
- |
|
PSOLID |
MID |
O |
- |
- |
PID,CORDM,IN, STRESS,ISOP, FCTN |
X |
- |
- |
|
PELAS |
K1,K2 |
O |
- |
ELASTICLINK SPRING |
PID1,PID2,GE1, GE2,S1,S2 |
X |
- |
- |
Material
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
MAT1 |
MID,E,G,NU,A |
O |
- |
MATERIAL |
RHO,TREF,GE, ST,SC,SS,MCSID |
X |
- |
- |
Boundary condition
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
SPC |
SID,G1,C1,D1, G2,C2,D2 |
O |
- |
CONSTRAINT |
SPC1 |
SID,C,Gi |
O |
- |
CONSTRAINT |
Static load
NASTRAN command | Detail command | Conversion | Limitation | Related midas Civil function |
---|---|---|---|---|
FORCE |
SID,G, F,N1, N2,N3 |
O |
- |
CONLOAD |
CID |
X |
To be updated |
- |
|
MOMENT |
SID,G,M,N1, N2,N3 |
O |
- |
CONLOAD |
CID |
X |
To be updated |
- |
|
PLOAD1 |
SID,EID,TYPE, SCALE,X1,P1, X2,P2 |
O |
- |
BEAMLOAD |
PLOAD4 |
SID,EID,P1,P2, P3,P4,G1, G3orG4,N1,N2,N3 |
O |
- |
PRSSURE |
CID |
X |
To be updated |
- |
<Commentary>
1. User-Defined Coordinate
(1) User-defined coordinates, such as rectangular coordinate, cylindrical coordinate, and spherical coordinate are converted to base coordinate/global coordinate in midas Civil.
(2) Nodes in the user-defined coordinate in Nastran input file is converted to nodes in the base coordinate.
2. Node
(1) Nodes with ID number greater than 100,000 can not be recognized in MIDAS/CIVIL, therefore, need to be assigned new ID before being converted.
(2) In the case of (1), any data related to the changed node ID will be changed accordingly.
3. Surface Elements
The type of surface elements (ex. Plane stress element, Plate element) is determined based on PID in PSHELL data. MID1 in PSHELL data will convert to Plane stress element, otherwise (MID2 or MID1 and MID2), convert to Plate element.
4. Plane Strain Element
Plane strain elements in Nastran use the X-Y plane based coordinate while those in MIDAS/CIVIL use the X-Z plane based coordinate. For this reason, conversion is not applicable.
5. Axisymmetric Element
Axisymmetric elements in Nastran use the X-Y plane based coordinate while those in MIDAS/CIVIL use the X-Z plane based coordinate. For this reason, conversion is not applicable.
6. CELAS1
(1) When both G1 and G2 are inputted in Nastran, they are converted to Elastic Link in MIDAS/Gen, CIVIL. When one of the two are inputted, they are converted to Elastic Support.
(2) When converting to Elastic Link, a warning message appears if DOF at C1 and C2 are different. Conversion is applicable as well.
(3) Same limitations are applied to CEAS2.
7. PBEAM
(1) PBEAM is a command that defines section properties of CBEAM. It supports tapered section inputs.
(2) If A, I1, I2, I12 and J values are 0, section in consideration is considered as a tapered section. Otherwise, converted to a normal shaped section.
8. PTUBE
(1) In USER/DB, converts based on the entered size.
(2) When T = 0, converts to Solid Round Section, otherwise to Pipe Section.
(3) When 0D2 value is not 0, converts to a tapered section
9. PSHELL
(1) When only MID1 is entered, the value of In-plane thickness is converted as the value of T.
(2) When only MID2 is entered, the value of In-plane thickness is converted as the value of T/1000 and the value of out-of-plane thickness is converted as the value of T.
(3) For cases other than (1) and (2), both the in-plane thickness and out-of-plane thickness values are converted as the value of T.
10. Material
(1) Only isotropic material is available in MIDAS/Gen, CIVIL. Accordingly MAT2 and MAT3, such as anisotropic material, supported in Nastran can not be converted.
-
Lucas DAT File
1. A plane strain element existing on the LUSAS X-Y plane cannot be converted into midas Civil.(In midas Civil, a plane strain element can exist only on the X-Z plane.)
2. Consistent Mass k of LUSAS cannot be converted.
Q & A
Question
What is the format for importing lines, polylines, and solid models from AutoCAD to MIDAS?
Answer
The following Image will help clarify this:
At the moment, solid models cannot be imported from AutoCAD.