6. Keyword BARRE#

6.1. Affordable characteristics#

Allows you to assign the characteristics of the cross sections of elements of type BARRE or CABLE_GAINE. Three types of cross sections defined by the SECTION operand can be treated.

To each type of section, it is possible to assign different characteristics identified by one or more names (operand CARA) to which as many values are associated (operand VALE). It is also possible to give the characteristics via a table in the case of the general section, see the documentation for the macr_cara_girder command.

6.2. Syntax#

BARRE = _F (

♦ GROUP_MA = lgma, [l_gr_mesh]

# general constant section

♦/SECTION = 'GENERALE',

♦/TABLE_CARA = tb_cara, [sd_table]

NOM_SEC = sec_name, [:ref:`K8 <K8>`]

/CARA = 'A',

VALE = va, [l_real]

# rectangle constant section

/SECTION = 'RECTANGLE',

♦ CARA =/['H'|'EP'],

/['HY'|'HZ'|'EPY'|'EPZ'],

♦ VALE = go, [l_real]

# circle constant section

/SECTION = 'CERCLE',

♦ CARA = ['R'|'EP'],

♦ VALE = go, [l_real]

◊ FCX = fv, [FONCTION]

),

Usage rule:

You cannot override one type of section (CERCLE, RECTANGLE, GENERALE) by another type of section (,,).

6.3. Operands#

6.3.1. Operand SECTION = “GENERALE”#

The only characteristic to be provided in this case is the cross-sectional area of the “A” bar. It can be read in a table (keywords TABLE_CARA and NOM_SEC, see § 9.4.3.1).

6.3.2. Operand SECTION = “CERCLE”#

CARA	Significance	Default value
R	Outer radius of the tube	Required
EP	Thickness in the case of a hollow tube	Solid tube (EP=R)

Figure 6.3.2-1: Section of type CERCLE.

These values are used to calculate the area \(A\) of the section.

6.3.3. Operand SECTION = “RECTANGLE”#

CARA	Significance	Default value
/HY	Dimension of the rectangle following GY	Required
HZ	Dimension of the rectangle following GZ	Required
/H	Edge length (if the rectangle is square)	Required
/EPY	Thickness according to GYdans in the case of a hollow tube	HY/2
EPZ	Thickness according to GZdans in the case of a hollow tube	HZ/2
/EP	Thickness along both axes in the case of a hollow tube	Solid tube

Figure 6.3.3-1 : Type section RECTANGLE .

Rules of use: for a given mesh

“H” is incompatible with “HZ” and “HY”
“EP” is not compatible with “EPY” and “EPZ”

6.4. Operand “FCX”#

◊ FCX = fv

Assignment of a function describing the dependence of the distributed force on the relative wind speed (see for example [V6.02.118]).