SECMODIF

SECMODIF, SECID, Keyword, Value1, Value2, Value3, Value4
Modifies section properties based on Keyword.

PREP7: Cross Sections

SECID

Unique section number.

Keyword

The section properties to modify. Possible Keyword settings are:

NORM	—	Modify the pretension section normal direction. See Pretension for more information.
NAME	—	Change the name of the specified pretension section. See Pretension for more information.
JOINT	—	Set command actions to apply to joint sections only. See Joints for more information.
SHELL	—	Modify a property of previously defined shell sections based on `Item` and `Value`. See Shells for more information.
BEAM	—	Modify a property of previously defined beam sections based on `Item` and `Value`. See Beams for more information.
PIPE	—	Modify a property of previously defined pipe sections based on `Item` and `Value`. See Pipes for more information.
LINK	—	Modify a property of previously defined link sections based on `Item` and `Value`. See Links for more information.
REINF	—	Modify a property of previously defined reinforcing sections based on `Item` and `Value`. See Reinforcing for more information.

Value1..Value4

The semantic labels for Value1, Value2, Value3 and Value4 as well as their descriptions and default/range values depend on the Keyword setting.

Notes

The SECMODIF command is divided into these types: Pretension, Joints, Shells, Beams, Pipes, Links, and Reinforcing.

For a specified pretension section, SECMODIF either modifies the normal, or changes the name of the surface.

For joint sections associated with penalty-based joint elements, SECMODIF modifies the penalty factors of a previously defined joint section.

For shell, beam, pipe, link, and reinforcing sections, SECMODIF modifies a property of previously defined sections based on Item and Value. The Value field does not allow blank input. Input 0 for zero value.

The SECOFFSET and SECCONTROL commands include limitations for specific element types and the SECMODIF command must not be used for this unsupported section data. See SECOFFSET and SECCONTROL for more details.

Pretension

If Keyword = NORM, command format is:

SECMODIF,SECID, NORM, NX, NY, NZ, KCN

SECID: Unique section number. This number must already be assigned to a section.
NORM: Modify the pretension section normal direction.
NX, NY, NZ: The individual normal components to modify.
KCN: Coordinate system number: 0 = global Cartesian, 1 = global cylindrical), 2 = global spherical, 4 = working plane), 5 = global Y axis cylindrical, or n = an arbitrary reference number assigned to a coordinate system.

If Keyword = NAME, the command format is:

SECMODIF,SECID, NAME, Name

SECID: Unique section number. This number must already be assigned to a section.
NAME: Change the name of the specified pretension section.
Name: The new name to be assigned to the pretension section.

Joints

If Keyword = JOINT, the command format is:

SECMODIF,SECID, JOINT, Option, dispPnltVal, RotPnltVal

SECID

Unique section number (which must already be assigned to a section), or unspecified. If no section number is specified, the penalty factors are applied to all joint sections associated with penalty-based joint elements only.

JOINT

Set command actions to apply to joint sections only.

Option

PNLT -- Modify penalty factors for the specified section.

dispPnltVal

Penalty value for displacement-based constraints:

> 0 -- The number is used as a scaling factor to scale the internally calculated penalty values.

< 0 -- The absolute value of the number is used as the penalty factor in calculations.

RotPnltVal

Penalty value for rotation-based constraints.

> 0 -- The number is used as a scaling factor to scale the internally calculated penalty values.

< 0 -- The absolute value of the number is used as the penalty factor in calculations.

Shells

If Keyword = SHELL, the command format is:

SECMODIF, SECID, SHELL, Item, Value

SECID: Unique section number. This number must already be assigned to a section if it is an integer value. If SECID = ALL, the input value is applied to all defined shell sections. A table name (%tablename%) is valid for multiple sections. Only an array-type table is valid.
SHELL: Modify a property of previously defined shell sections based on Item and Value.
Item: Label identifying data to modify. For details, see Table 245: Valid Item and Values for Selected Shell Sections.
Value: Input value for Item. For details, see Table 245: Valid Item and Values for Selected Shell Sections.

Table 245: Valid Item and Values for Selected Shell Sections

Item ^[a]	Value	Related Command
TK, MAT, THETA, NUMP	Numeric value	SECDATA ^[b]
LNAME	Up to 32 characters	SECDATA ^[b]
E11, E22, E12, ADDMAS, HMEMSCF, HBENSCF, DRLSTIF, BENSTIF	Numeric Value	SECCONTROL ^[c]
OFFSET	TOP, MID, BOT ^[d] Numeric Value ^[e]	SECOFFSET ^[c]
TABL, NODE, NOD2	%tablename%	SECFUNCTION ^[c]

^[a]The Item labels are equivalent to field names in the related commands.

^[b]To apply the item and value to specific layers, issue EMSEL prior to this command.

^[c]The EMSEL command is not necessary for the data defined by the SECCONTROL, SECOFFSET, and SECFUNCTION commands.

^[d]The labels can be used for pre-defined offset locations.

^[e]If the input is a numeric value, the offsets are considered user-defined offsets.

Beams

If Keyword = BEAM, the command format is:

SECMODIF, SECID, BEAM, SubType, Item, Value

SECID: Unique section number. This number must already be assigned to a section if it is an integer value. If SECID = ALL, the input value is applied to all defined beam sections with a valid subtype. A table name (%tablename%) is valid for multiple sections. Only an array-type table is valid.
BEAM: Modify a property of previously defined beam sections based on Item and Value.
SubType: Label identifying section subtype. Valid subtypes are RECT, QUAD, CSOL, CTUB, CHAN, I, Z, L, T, HATS, HREC and ASEC.
Item: Label identifying data to modify. For details, see Table 246: Valid Item and Values for Selected Beam Sections.
Value: Input value for Item. For details, see Table 246: Valid Item and Values for Selected Beam Sections.

Table 246: Valid Item and Values for Selected Beam Sections

Subtype	Item	Value	Related Command
RECT	B, H, NB, NH	Numeric value	SECDATA
QUAD	YI, ZI, YJ, YK, ZK, YL, ZL, NG, NH
CSOLID	R, N, T
CTUBE	RI, RO, N
CHAN, I, Z	W1, W2, W3, T1, T2, T3
L, T	W1, W2, T1, T2
HATS	W1, W2, W3, W4, T1, T2, T3, T4, T5
HREC	W1, W2, T1, T2, T3, T4
ASEC	A, IYY, IYZ, IZZ, IW, J, CGY, CGZ, SHY, SHZ, TKZ, TKY, TSXZ, TSXY
-	TXZ , TXY, ADDM	Numeric Value	SECCONTROL
-	OFFSET	CENT, SHRC, ORIG	SECOFFSET
-	OFFY, OFFZ ^[a] CGY, CGZ, SHY, SHZ ^[b]	Numeric Value	SECOFFSET

^[a]OFFY and OFFZ are equivalent to USER offsets.

^[b]When you input a new property, related section properties are recalculated. Therefore, if the centroid or shear centroid location was previously overridden by SECOFFSET, they are overwritten by the calculated values.

Pipes

If Keyword = PIPE, the command format is:

SECMODIF, SECID, PIPE, Item, Value

SECID: Unique section number. This number must already be assigned to a section if it is an integer value. If SECID = ALL, the input value is applied to all defined pipe sections. A table name (%tablename%) is valid for multiple sections. Only an array-type table is valid.
PIPE: Modify a property of previously defined pipe sections based on Item and Value.
Item: Label identifying data to modify. For details, see Table 247: Valid Item and Values for Selected Pipe Sections.
Value: Input value for Item. For details, see Table 247: Valid Item and Values for Selected Pipe Sections.

Table 247: Valid Item and Values for Selected Pipe Sections

Item	Value	Related Command
DO, TW, NC, SS, NT, MINT, MINS, TINS	Numeric Value	SECDATA
ADDM	Numeric Value	SECCONTROL
OFFY, OFFZ	Numeric Value	SECOFFSET

Links

If Keyword = LINK, the command format is:

SECMODIF, SECID, LINK, Item, Value

SECID: Unique section number. This number must already be assigned to a section if it is an integer value. If SECID = ALL, the input value is applied to all defined link sections. A table name (%tablename%) is valid for multiple sections. Only an array-type table is valid.
LINK: Modify a property of previously defined link sections based on Item and Value.
Item: Label identifying data to modify. For details, see Table 248: Valid Item and Values for Selected Link Sections.
Value: Input value for Item. For details, see Table 248: Valid Item and Values for Selected Link Sections.

Table 248: Valid Item and Values for Selected Link Sections

Item	Value	Related Command
AREA	Numeric Value	SECDATA
ADDMAS, TENSKEY, CV1, CV2, CV3, CV4	Numeric Value	SECCONTROL

Reinforcing

If Keyword = REINF, the command format is:

SECMODIF, SECID, REINF, Subtype, Item, Value

SECID: Unique section number. This number must already be assigned to a section if it is an integer value. If SECID = ALL, the input value is applied to all defined reinforcing sections with a valid subtype. A table name (%tablename%) is valid for multiple sections. Only an array-type table is valid.
REINF: Modifiy a property of previously defined reinforcing sections based on Item and Value.
Subtype: Label identifying section subtype. Valid subtypes are DISC and SMEA.
Item: Label identifying data to modify. For details, see Table 249: Valid Item and Values for Selected Reinforcing Sections.
Value: Input value for Item. For details, see Table 249: Valid Item and Values for Selected Reinforcing Sections.

Table 249: Valid Item and Values for Selected Reinforcing Sections

Subtype	Item	Value	Related Command
DISC	MAT, AREA	Numeric value	SECDATA
SMEA	MAT, AREA, SPACE, KCN, THETA		SECDATA
-	TENSKEY, REMBASE, STSSTATE		SECCONTROL

Only reinforcing sections for the mesh-independent method are valid (PATT = MESH in the SECDATA command). Issue the SECMODIF command before issuing the EREINF command. If SECMODIF is issued after EREINF, updated properties are not transferred to the reinforcing sections generated by EREINF.

Menu Paths

Main Menu>Preprocessor>Sections>Pretension>Modify Name

Main Menu>Preprocessor>Sections>Pretension>Modify Normal