wind load

Have you had a chance to take a look at Help-Contents-Application Examples-American or British Examples? There are essentially 2 parts to the process of generating the wind load. Part 1 is called the WIND LOAD DEFINITION where you specify the wind pressure profile (pressure versus height table) and certain other data. In Part 2, you instruct the program to generate joint loads and apply them along a specific direction like global X or global Z.

Sorry, forgot to mention the example number, which is 15.

Also, one may assign the wind loads to a specific groups of members. This approach is specifically useful when the bracing members should be excluded from the wind load.

Here are the steps:

1. Create member groups;

2. Create the wind loads;

3. In STAAD Editor, find and modify corresponding wind load commands in the following manner:

LOAD 15 LOADTYPE Wind  TITLE WIND X P.C.

WIND LOAD X 1 TYPE 4 XR 0 5.7 YR 0 10 ZR -18 0

change to

LOAD 15 LOADTYPE Wind  TITLE WIND X P.C.

WIND LOAD X 1 TYPE 4 MEMB _GROUP NAME

Note - this will work for closed type structures, for the open type structures the workaround will not work.

To AndrejLogunov:

I am trying to use this approach to apply generated wind loads on an array of three lattice towers, linked together by cables.  I keep getting a "range option bug" error in the LOADTYPE definition at the place where the member names are entered.

Does the exclusion you noted below regarding "open" structures also apply to lattice towers?

Thanks.

Array w-buttress.std