# /PROP/TYPE3 (BEAM)

Block Format Keyword Describes the beam property for torsion, bending, membrane or axial deformation.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/PROP/TYPE3/prop_ID/unit_ID or /PROP/BEAM/prop_ID/unit_ID
prop_title
Ismstr
dm df
Area IYY IZZ IXX
${\omega }_{DOF}$ Ishear

## Definitions

Field Contents SI Unit Example
prop_ID Property identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

prop_title Property title

(Character, maximum 100 characters)

Ismstr Small strain option flag.
=0 (Default)
Set to 4
=1
Small strain formulation from t = 0
=2
Set to 4
=3
Set to 4
=4
Full geometric nonlinearities

(Integer)

dm Beam membrane damping

Default = 0.00 (Real)

df Beam flexural damping

Default = 0.01 (Real)

Area Cross section

(Real)

$\left[{\text{m}}^{2}\right]$
IYY Area moment of inertia, bending.

(Real)

$\left[{\text{m}}^{4}\right]$
IZZ Area moment of inertia, bending.

(Real)

$\left[{\text{m}}^{4}\right]$
IXX Area moment of inertia, torsion.

(Real)

$\left[{\text{m}}^{4}\right]$
${\omega }_{DOF}$ Rotation DOF code of nodes 1 and 2 (see detail input below).

(6 Booleans)

Ishear Beam formulation flag.
=0
Takes shear into account.
=1
Neglects shear.

(Integer)

## Detail of Rotation DOF Input Fields for Nodes 1 and 2

(1)-1 (1)-2 (1)-3 (1)-4 (1)-5 (1)-6 (1)-7 (1)-8 (1)-9 (1)-10
${\omega }_{X1}$ ${\omega }_{Y1}$ ${\omega }_{Z1}$   ${\omega }_{X2}$ ${\omega }_{Y2}$ ${\omega }_{Z2}$

## Definitions

Field Contents SI Unit Example
${\omega }_{X1}$ = 1 Rotation DOF about X at node 1 is released.

(Boolean)

${\omega }_{Y1}$ = 1 Rotation DOF about Y at node 1 is released.

(Boolean)

${\omega }_{Z1}$ = 1 Rotation DOF about Z at node 1 is released.

(Boolean)

${\omega }_{X2}$ = 1 Rotation DOF about X at node 2 is released.

(Boolean)

${\omega }_{Y2}$ = 1 Rotation DOF about Y at node 2 is released.

(Boolean)

${\omega }_{Z2}$ = 1 Rotation DOF about Z at node 2 is released.

(Boolean)

## Example (Beam)

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/UNIT/2
unit for prop
g                  mm                  ms
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/PROP/BEAM/4/2
beam (bXh=10X10)
#             Ismstr
0
#                 dm                  df
0                   0
#               Area                 Iyy                 Izz                 Ixx
100              833.33              833.33             1666.66
#      Rot    Ishear
000 000         0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#ENDDATA
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

1. Small strain formulation is activated from time t=0, if Ismstr =1. It may be used for a faster preliminary analysis because $\text{Δ}t$ is constant, but the accuracy of results is not ensured.