Where several beam elements are continuously
connected in a straight line, set the end points of the line and enter
the continuous beam load. The load type may be a distributed load or in-span
concentrated loads. Modify or delete previously entered loads as necessary.
Loads can be also applied to a curved continuous beam, which is located
in the plane of the loading direction.
In addition, curvilinear distribution such
as earth pressure can be loaded by using curved loads.
Eccentric loads can be applied to beam elements
with reference to the GCS or ECS.
Call
From the Main Menu select Load > Line Beam Loads.
Select Static Loads > Line Beam Loads in the
Menu tab of the Tree Menu.
Entry
Load Case Name
Assign the load case name. Click to the right to enter, additional load cases and modify or
delete existing load cases.
Load Group Name
Select the desire Load Group Name. Click
to the right to enter additional load group names and
modify or delete existing load group names.
Options
Add:
To enter or add new continuous beam loads on beam elements connected continuously
in a straight line
Replace:
To replace previously entered continuous beam loads on beam elements connected
continuously in a straight line
Delete:
To delete previously entered continuous beam loads on beam elements connected
continuously in a straight line
Load Type
Assign the loading type of continuous beam
loads. The loading types are as follows :
Concentrated
Forces: Concentrated forces at a point in span
Concentrated
Moments/Torsions: Concentrated moments/torsions at a point in span
Trapezoidal
Loads: Trapezoidal load varying linearly along the beam length
Trapezoidal
Moments/Torsions: Trapezoidal bending moments/torsions varying
linearly along the beam length
Curved
Load: Curvilinear load distribution based on a curve equation varying
along the beam length
Note
Curved Loads are loaded on three equally divided segments of elements.
If an element is long, the load distribution becomes close to a straight
line. So
the elements need to be sufficiently divided to closely represent curved
load distribution.
Element Selection
Select the control target for loading the
beam loads.
On the
loading Line: Line Beam Loads are
applied to the elements on a straight line defined by two nodes.
Select
Element: Line Beam Loads are applied
to the selected elements.
Note
The elements that are subjected to Line Beam Loads must be placed in the
plane of the loading direction. Line Beam Loads can be also applied to
curved beams provided that the beam lies on the plane.
Eccentricity
By assigning the eccentricity distance, the
user can easily assign an eccentric load.
As shown in the picture below, by inputting
the eccentricity distance and load, the program automatically converts
them to an equivalent moment. This function is convenient to assign an
eccentric beam load, such as wind load.
Direction:
Input the direction of eccentricity
Distance:
Input the direction of eccentricity
I-End:
Eccentricity from the node
J-End:
Eccentricity from the node
Eccentric Beam Load
Direction
Assign the loading direction of continuous
beam loads. The loading directions are as follows :
Local x:
Beam load applied in the element local x-direction
Local y:
Beam load applied in the element local y-direction
Local z:
Beam load applied in the element local z-direction
Global
X: Beam load applied in GCS X-direction
Global
Y: Beam load applied in GCS Y-direction
Global
Z: Beam load applied in GCS Z-direction
When the loading direction does not correspond
to the above 6 directions, enter the force components in each direction
with appropriate signs.
Projection
Define if the continuous beam load is to
be applied along the continuous beams or if the loading is to be vertically
projected on the beams. This command takes effect only when the load type
is 'Uniform Loads' or 'Trapezoidal Loads' and the loading direction is
'Global'.
Yes:
When a vertically projected continuous beam load is applied to the continuous
beams.
No:
When a continuous beam load is applied along the continuous beams.
Value
Define if the loading positions of the continuous
beam loads are to be entered in the relative ratio of a loaded beam length.
Relative:
Relative ratio of a beam length
Absolute:
Real beam length
x1, x2,
x3, x4, W: Refer to the guide diagram to specify the load magnitude
and locations.
a, b, c:
Constants defining the load distribution equation
When the Curved Load Type is selected, curvilinear
distribution is given by
P(x)=ax^0.5+b
P(x)=ax^2+bx+c
Nodes for
Loading Line
Enter the node numbers of the two ends of
the continuous beams. The two node numbers may be set with the mouse using
Node Snap in the working window.
Copy Load
Check in copy load to repeat the continuous
beam loads for other rows of continuous beams.
Axis:
Set the copy direction
x:
UCS x-direction
y:
UCS y-direction
z:
UCS z-direction
Distances:
Copy distances
When copying loads onto several rows of other
continuous beams, enter the copy distances (spacings) as many times as
required.
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Load Case Name.jpg)
to the right to enter, additional load cases and modify or
delete existing load cases.
node
Nodes for
Loading Line