wind load

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

Online AndrejLogunov,

This is brilliant method to apply wind load on closed (cladded) structures. Only trouble is, it applies nodal loads on nodes of members in group selected. Even if it is considering only beam-column junction node then still it is acceptable but it also applies load on intermediate beams as well. Ideally the intended application of load is UDL on columns. Is there any way to achieve this result in STAAD.Pro.

The wind loads are always calculated at the nodes for closed structures. The software would calculate the load on the closed panels formed by columns and beams and then would apply the load as nodal load to the joints at the corners of the closed panels. The load is only calculated as UDL when one uses the Open structure option. It is not possible to apply the wind load as UDL for closed structures using the automatic wind load generation. If applying the wind load as UDL is important for you, you may consider applying the load as a member load ( uniform force option ) on the appropriate members,

Thank you very much, for comprehensive explanation on my request.

Thank you very much, for comprehensive explanation on my request.