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Self-straining force (T) in load combinations

Self-straining force (T) in load combinations

Self-straining force (T) in load combinations


In ASCE 7-05, the self-straining force or temperature load (symbol T) was included only in load combination no. 2 of the LRFD and ASD combinations. It was not added to the earthquake and wind load combinations.
In ASCE 7-10, 'T' is not directly included in any load combination. But according to Section 2.3.5 'where applicable, the structural effects of load T shall be considered in combination with other loads'.

Could anyone shed some light on this topic?
Should the temperature load be considered in all the load combinations?


RE: Self-straining force (T) in load combinations

Considered yes.

Included? Depends on the consideration.

In most cases I wouldn't include daily temperature loads during design earthquake events (ergo the load combinations meant to capture those). For some structures, I wouldn't worry about them at all.

But in some cases I might; I'm just making things up here, but perhaps temperature load generated by mechanical equipment, or for other self-straining (e.g. shrinkage) when significant.

The name is a long story -- just call me Lo.

RE: Self-straining force (T) in load combinations

Thanks for your reply!

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