Hi,
Looking at the SLS paremeters for slab analysis. I have a few questions. I am used to utilising SAFE for deflection analysis of my flat slabs; however I am intrigued about the capability of ROBOT to offer a complete design solution.
I note that in the BS8110 reinforcement parameters a "ratio of loads:long-term to varaible" value can be edited.
Is there any way of assigning the long term/short term to a specific load? and also is there a mothod of attributing a certain percentage of a certain loading case to long term or short term laoding parameters. I.e. could I attribute 20% live as long term sustained loading and 80% to instantaneous short term loading?
Many Thanks,
Andrew
Presumably, if I set 30% of load to be be long term sustained then this will result in all of the loading in the SLS combination being treated as long term?
Do I need to manually go through my unfactored loads and calculate how much of it needs to be long term? What happens is I am to expect some long term live in one area an not another?
esuffk wrote:
Presumably, if I set 30% of load to be be long term sustained then this will result in all of the loading in the SLS combination being treated as long term?
You can also determine the ratio of variable loads to long-term loads.
Variable loads may be divided into short-term and long-term loads. The long-term to variable coefficient specified in the Ratio of loads is used to split variable loads into a short-term part and a long-term part according to the following formula.
variable load = (1 - c) * variable load + c * variable load = short-term load + long-term load,
where c is a coefficient of the participation of long-term loads in variable loads.