Not calculated internal forces

If required, the user can input to any 1D member and any load case his/her definition of the distribution of internal forces along the 1D member. The input of these "not-calculated" internal forces can be made in service Load. This user-input internal force is displayed as a normal load.

Type

It is possible to define up to 7 different components of internal forces or stresses: N, Vy, Vz, Mx, My, Mz, Sig Y, Sig Z.

Distribution

Uniform - 1 value is defined	$image\cone.gif$	$image\cone.gif$
Trapez - 2 values on ends are defined	$image\truncatedcone.gif$	$image\truncatedcone.gif$
Triangle - 2 values on ends and 1 in the middle are defined	$image\truncatedcone.gif$	$image\truncatedcone.gif$
Polynomic - n values in n relative sections are input	$image\truncatedcone.gif$	$image\truncatedcone.gif$

Polynomic distribution - details

User can add n lines to polynomic distribution by right-click on the line. In the same way user can delete the row.

$image\truncatedcone.gif$

Other way how to import polynomic distribution is using import functionality.

$image\truncatedcone.gif$

Import uses *.csv files which can be done manually in notepad. This syntax is required - based on the coordinate definition

$image\truncatedcone.gif$

Type of definition:

Add to - Adds values from csv file to current table - it is important to have same number of lines and same dx defined in both (table and csv)

Overwrite - Overwrites values in the table with definition from csv

Tip: *.csv file can be easily created from table results, when you export the table to excel, do adjustments (extract columns dx and force as a text) and copy the data to notepad, and save it as *.csv. This can be useful when you want to carry results from one structure to the same one, but don’t want to calculate everything in new model.

$image\truncatedcone.gif$ $image\truncatedcone.gif$ $image\truncatedcone.gif$

Note: Sig Y value can be applied in Member stress results for standard load cases. Sig Z can be taken in account only in prestress load cases.

Calculated results

Original - My results from FEM analysis (LC2 = standard load inputted)	$image\cone.gif$	$image\cone.gif$
Add to - adding uniform value of My = 5 kNm to FEM results (LC3 = same load as LC2, plus added NCIF to the same load case)	$image\truncatedcone.gif$	$image\truncatedcone.gif$
Overwrite - overwriting FEM results with not calculated internal force my = 5kNm (LC4)	$image\truncatedcone.gif$	$image\truncatedcone.gif$

Procedure to input not calculated internal forces

Open service Load.
Start function Not-calculated internal forces.
If required, type the name that serves better orientation in your project.
Select the type (one of the seven components mentioned above).
Select the distribution (one of the four stated above).
Press the three-dot button in item Parameters in order to open an extra dialogue and input the required values.
Confirm the parameters with [OK].
Confirm the load definition with [OK].
Position the load to required 1D members.