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Re: UBC '97 Sec 1633.2.4 Deformation compatibilty

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My opinion is that the first ondition would govern if you consider the effects of torsional rotation, which would mean that the
inelastic interstorey drift for some elements could be higher than 2.5%.

Attila Beres wrote:

> If I am reading this right, this check asks for using the interstory deformation value to be considered as the greater of :
>
> 1. DeltaM, as calculated in accordance to Sec 1630.9.2 (0.7*R*DeltaS)
>
> 2. 0.025*story height.
>
> When would the first condition govern? The inelastic story drift ratios are limited to max. 0.025.
>
> Am I missing something, or the first condition is redundant?
> ...........................................................................
> Attila Beres
>