~CSECDMS
~CSECDMS, USEC, SecTyp, NMAT, DMS1, DMS2, DMS3, DMS4, DMS5, DMS6, DMS7, DMS8, RKEY, RMAT
Defines concrete cross sections by dimensions
PREP7: Cross Sections
USEC
User number of the section to be defined.
SecTyp
Label identifying the type of section to be defined. Valid arguments are:
|
BOX |
Box section |
|
CIRC |
Circular section |
|
I |
Double T section |
|
PIPE |
Hollow circular section |
|
REC |
Rectangular section |
|
T |
T section |
NMAT
Material associated to section. By default the active material.
DMS1, DMS2, DMS3, DMS4, DMS5, DMS6, DMS7, DMS8
Section dimensions. Valid labels depend on the type of section (SecTyp):
|
SecTyp |
|
Description |
|
BOX |
DMS1 |
Y width (Tky) |
|
|
DMS2 |
Z width (Tkz) |
|
|
DMS3 |
Y thickness (Twy) |
|
|
DMS4 |
Z thickness (Twz) |

Box section
|
SecTyp |
|
Description |
|
CIRC |
DMS1 |
Diameter (OD) |
|
|
DMS2 |
Number of cells (Ncells) (Beam 188, Beam 189). (By default DMS2=8) |

Circular Section
|
SecTyp |
|
Description |
|
I |
DMS1 |
Total depth |
|
|
DMS2 |
Web thickness (Tw) |
|
|
DMS3 |
Top flange width (BfTop) |
|
|
DMS4 |
Top flange thickness (TfTop) |
|
|
DMS5 |
Bottom flange width (BfBot) |
|
|
DMS6 |
Bottom flange thickness (TfBot) |

Double T Section
|
SecTyp |
|
Description |
|
PIPE |
DMS1 |
Diameter (OD) |
|
|
DMS2 |
Wall thickness (Tkw) |
|
|
DMS3 |
Number of cells (Ncells) (Beam 188, Beam 189). (By default DMS3=8) |

Circular annular section
|
SecTyp |
|
Description |
|
REC |
DMS1 |
Y width (Tky) |
|
|
DMS2 |
Z width (Tkz) |
|
|
DMS3 |
Number of cells (NB) over width (Beam 188, 189). (By default DMS3=2) |
|
|
DMS4 |
Number of cells (NH) over depth (Beam 188, 189). (By default DMS4=2) |

Rectangular Section
|
SecTyp |
|
Description |
|
T |
DMS1 |
Total depth |
|
|
DMS2 |
Web thickness (Tw) |
|
|
DMS3 |
Flange width (Bf) |
|
|
DMS4 |
Flange thickness (Tf) |

T Section
RKEY
Type of initial reinforcement automatically defined by the program. By default RKEY = 0 (No reinforcement). Valid values depend on the type of section. (SecTyp).
|
SecTyp |
RKEY |
Description |
|
BOX |
1 |
It is automatically given a reinforcement amount distributed linearly equal to 5 per 1000 presented as in the figure. |
![]() |
Box section reinforcement (RKEY=1)
|
|
RKEY =1 |
|||||||
|
Group 1 |
Group 2 |
Group 3 |
Group 4 |
Group 5 |
Group 6 |
Group 7 |
Group 8 |
|
|
URF |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
CLS |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
FI |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
|
UFC |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
END |
4 |
4 |
4 |
4 |
0 |
0 |
0 |
0 |
|
MC |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
|
GC |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
|
AST |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
|
ASL |
|
|||||||
|
N |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
|
NL |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
|
S |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
Area = Section gross area
|
SecTyp |
RKEY |
Description |
|
CIRC |
1 |
It is automatically given a reinforcement amount distributed linearly equal to 5 per 1000 presented as in the figure. |
![]() |
Circular section reinforcement (RKEY=1)
|
|
RKEY =1 |
|
Group 1 |
|
|
URF |
1 |
|
CLS |
0 |
|
FI |
_ |
|
UFC |
1 |
|
END |
0 |
|
MC |
4cm |
|
GC |
4cm |
|
AST |
0.005*Area |
|
ASL |
_ |
|
N |
_ |
|
NL |
_ |
|
S |
_ |
Area = Section gross area
          Â
|
SecTyp |
RKEY |
Description |
|
REC |
1 |
It is automatically given a reinforcement amount of 4 bars equal 5 per 1000 as presented in the figure. |
|
|
2 |
It is automatically given a reinforcement amount distributed linearly equal to 5 per 1000 presented as in the figure. |
|
|
3 |
It is automatically given a reinforcement amount distributed linearly equal to 5 per 1000 presented as in the figure. |
                RKEY=1                            RKEY=2                                    RKEY=3

|
|
RKEY =1 |
RKEY =2 |
RKEY =3 |
|||||
|
Group 1 |
Group 2 |
Group 1 |
Group 2 |
Group 1 |
Group 2 |
Group 3 |
Group 4 |
|
|
URF |
1 |
2 |
1 |
2 |
1 |
2 |
3 |
4 |
|
CLS |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
FI |
|
_ |
_ |
_ |
_ |
_ |
_ |
|
|
UFC |
2 |
4 |
2 |
4 |
1 |
2 |
3 |
4 |
|
END |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
|
MC |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
|
GC |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
4cm |
|
AST |
_ |
_ |
0.0025*Area |
0.0025*Area |
_ |
_ |
_ |
_ |
|
ASL |
_ |
_ |
_ |
_ |
|
|||
|
N |
2 |
2 |
_ |
_ |
_ |
_ |
_ |
_ |
|
NL |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
|
S |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
_ |
Area = Section gross area
|
SecTyp |
RKEY |
Description |
|
I |
1 |
It is automatically given a linear reinforcement amount distributed equal to 8 per 1000 being the half of it in the top flange and the half in the bottom one. |
|
|
2 |
It is automatically given a linear reinforcement amount distributed equal to 4 per 1000 in the bottom flange. |
|
|
3 |
It is automatically given a linear reinforcement amount distributed equal to 4 per 100 in top flange. |
![]() |
RKEY=1Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â RKEY=2Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â RKEY=3
|
|
RKEY =1 |
RKEY =2 |
RKEY =3 |
|
|
Group 1 |
Group 2 |
Group 1 |
Group 1 |
|
|
URF |
1 |
2 |
1 |
1 |
|
CLS |
0 |
0 |
0 |
0 |
|
FI |
_ |
_ |
_ |
_ |
|
UFC |
1 |
2 |
2 |
1 |
|
END |
4 |
4 |
4 |
4 |
|
MC |
4cm |
4cm |
4cm |
4cm |
|
GC |
4cm |
4cm |
4cm |
4cm |
|
AST |
0.004*Area |
0.004*Area |
0.004*Area |
0.004*Area |
|
ASL |
_ |
_ |
_ |
_ |
|
N |
_ |
_ |
_ |
_ |
|
NL |
_ |
_ |
_ |
_ |
|
S |
_ |
_ |
_ |
_ |
Area = Section gross area
|
SecTyp |
RKEY |
Description |
|
T |
1 |
It is automatically given a linear reinforcement amount distributed equal to 4 per 1000 in bottom flange. |
|
|
2 |
It is automatically given a linear reinforcement amount distributed equal to 8 per 1000 being the half of it in the top flange and the half in the bottom one. |
![]() |
|||
![]() |
|||
  RKEY=1                                                          RKEY=2                          Â
      Â
|
|
RKEY =1 |
RKEY =2 |
|
|
Group 1 |
Group 1 |
Group 2 |
|
|
URF |
1 |
1 |
2 |
|
CLS |
0 |
0 |
0 |
|
FI |
_ |
_ |
_ |
|
UFC |
2 |
1 |
2 |
|
END |
4 |
4 |
4 |
|
MC |
4cm |
4cm |
4cm |
|
GC |
4cm |
4cm |
4cm |
|
AST |
0.004*Area |
0.004*Area |
0.004*Area |
|
ASL |
_ |
_ |
_ |
|
N |
_ |
_ |
_ |
|
NL |
_ |
_ |
_ |
|
S |
_ |
_ |
_ |
Area = Section gross area
|
SecTyp |
RKEY |
Description |
|
PIPE |
1 |
It is automatically given a linear reinforcement amount distributed equal to 5 per 1000 as presented in the figure. |
![]() |
                                       RKEY=1
                      Â
|
|
RKEY =1 |
|
|
Group 1 |
Group 2 |
|
|
URF |
1 |
2 |
|
CLS |
0 |
0 |
|
FI |
_ |
_ |
|
UFC |
1 |
2 |
|
END |
0 |
0 |
|
MC |
4cm |
4cm |
|
GC |
4cm |
4cm |
|
AST |
|
|
|
ASL |
_ |
_ |
|
N |
_ |
_ |
|
NL |
_ |
_ |
|
S |
_ |
_ |
Area = Section gross area
RMAT
Initial reinforcement material (only if RKEY>0).
Notes
- The detailed description of each of the reinforcement parameters presented in the tables may be seen in the ~RNFDEF and ~RNFMDF commands. Although a default value for the END parameter of all sections and its corresponding RKEY are defined, it has no sense to define it as distributed, because in this case, the reinforcement will always be distributed along the associated face, that is to say, along its length. However, if the distributed reinforcement is substituted by bars by default, the program will distribute the bars automatically, taken into account the END default value without being necessary to define it again. See ~RNFDEF and ~RNFMDF commands to add or modified reinforcements.
Menu Paths
Main Menu > Civil Preprocessor > Cross Sections > Concrete
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