Optimizing steel members

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After a steel structure has been defined and verified,

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it's time to optimize the steel members

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to begin.

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The structure needs to have defined groups

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based on function

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loads applied

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and expected material effort

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to define a group

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from the text menu, select design

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steel members design options,

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members, group's definition.

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This displays the definitions, dialogue,

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open the groups tab

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next to number. Click new,

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clear the member list, text field

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and in the drawing area,

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select a main column,

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right, click and click, select similar,

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select by member type.

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Click in the member list field to update

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the field with the number for the main columns

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in the name field.

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Enter main columns.

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Next

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click sections,

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the selection of sections, dialogue displays

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under databases, select the appropriate database

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and then under section families

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select UC universal columns.

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Click OK to close the dialogue

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in the definitions. Dialogue, click save

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this process repeats

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for each group of members.

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The groups defined after the main column

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are gable wall columns, rafters,

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pearls,

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wal girts and braces

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for each group.

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Click new to create a new group.

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Clear the member list field,

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select the necessary components

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by using selection by member type

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and click sections

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to define this section, databases and families.

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The order in which the groups are defined makes it possible for the following group

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to inherit the definitions of the preceding group.

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When applicable.

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For example,

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since gable wall columns

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use the same section types,

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you do not need to assign the selection of sections

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for rafters.

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The selection families are different

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to clear sections

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from the selection of sections. Dialogue,

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click delete all,

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then

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select the section families, UB universal beams

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and RSJ

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rolled steel joints

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again,

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click OK to close the dialogue

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and

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from the definitions, dialogue, click save

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pearls

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inherit the same section families as rafters.

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Therefore,

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they do not need modification.

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Select the

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pins using the selection by member type

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and assign the group a name

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Walts

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need to be assigned different section families

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once selected and named

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click sections

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to open the selection of sections, dialogue,

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clear inherited sections

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and then

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set the section family to RSC rolled steel channels.

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Finally

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select the braces and name the group

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click sections to open the selection of sections. Dialogue

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from here,

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clear the inherited sections

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and then

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assign the braces to the user database

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and the pr section family.

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Remember to click save after each new group is defined

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as new groups are made.

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The group number updates automatically

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once all groups are defined

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close the dialogue

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to begin optimization

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from the text menu,

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select design

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steel member design options, calculation.

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This displays the calculations, dialogue

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under verification options, select code group design,

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check optimization

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and check uls limit state

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next to optimization select options.

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This displays the optimization options, dialogue,

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adjust the options if necessary.

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Click OK to close the dialogue

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to modify advanced parameters, click configuration,

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this displays the configuration dialogue,

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close the dialogue

04:59

back in the calculations, dialogue

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uncheck save calculation results

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under limit states.

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Select list to view the load case selection dialogue

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here you can modify the ULS components

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close the dialogue.

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After modifications are made, click calculations,

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the code group design dialogue displays

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and calculations load for a few moments,

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inspect the messages that appear before proceeding

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open the results tab

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results are displayed in groups

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for each group member.

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An optimal section is indicated with a blue icon.

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Select change all to optimize all groups

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close the dialogue.

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Remember to rerun calculations after changing sections

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to do this from the text menu,

05:58

select analysis calculations,

06:02

the calculations, dialogue displays

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and takes a few moments to load

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back in the code group calculations, dialogue, click calculations once more

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to run those calculations again

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again. From the code group design dialogue,

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click change all to optimize sections.

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Repeat this loop of calculation

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until you have a stable solution. In each group.

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A stable solution is indicated when two

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consecutive rounds have the same optimization sections

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are signed in groups.

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Next

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verify the SLS limit state,

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select SLS from the calculations, dialogue

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and then

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select code group verification,

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select calculations,

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the code group verification, dialogue displays,

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inspect the results,

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then close the dialogue.