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Thanks everyone this information has been really useful.

Thanks. I have been reading into plastic hinges in seems the way to go for this type of analysis. But i think the direction were heading is the post will fail for all intesive purposes in the worst case scenario. We will have to design the debris fences to act as system which will give the...

bump.

If you could give me any tips on how to anaylise it plastically it would be much appreciated. I have sort of come to a mental road block. Ive been reading some complex impulse theory and the math is beyond my ability to follow and probally most engineers and is not practical out side of the lab.

I have been designing the barrier system for V8 a race in Australia. For the concrete barriers the calculations were pretty straight forward. We assumed that 4 - 3 barriers would act together through catenary action to resist the load. I assumed an inelastic collision between the car and the...

Thanks for the responses.

How do you guys like to do your load take downs? Do you use FEM software, equivalent frame models or just do it by hand using tributary areas ? I have been doing it by hand but i'm considering using SAFE. Just stripping down the architectuals and importing the floor plans in an assigning the...

Thanks heaps for the reply. I'll check out those sections in the ACI. Sorry, above I made a mistake. I meant to say I increased the capacity through the factor B3 which factors in the compression load not reduced.

Yeah that's what i did, as mentioned above. But is this too conservative? Or is it the way it's done.

The AS 4100 is the Australian Standards for steel design. You need a subscription.

Hello. I am a freshmen structural engineer - (12 weeks experience lol) so sorry if this is an obvious question :) I have circular concrete column with a diamater of 600mm reinforced around the perimeter with 8 N20 bars - (20mm diam, 500Mpa)which can be seen attached. This column is subjected...