Yeah you are right. I tried to use this method and find something bit weird, even if I set the averaging width to 5meters it still shows much more reinforcement required at top than I used strip method with smaller widths.
Thank you. Strip force from Ram Concept looks reasonable. Don't know why SAFE gives different results. So does that mean in Ram Concept you can simply place the span segments in ortho directions with reasonable strip widths despite the layout of supports instead of running from support to...
This is something what I would do too. The question is how to place the span segments, say for the middle one highlighted below? As I mentioned, supports here dont form a ortho direction. If I place the span segment centrally will it capture the peak moments over the supports where are not...
Thanks Celt83. Yes. I understand that is how it works at analysis stage. But does this have to do with the strips? I would expect the FEA is run, get the results, and the only thing strips do is to read these results and average out them. ie. Strip will not affect the analysis, they just get the...
Rapt, if the design strip is too wide, like you said, if I adopt 2m wide for where transfer loads are, what will happen? The mean values will be lower but does that mean the slab will crack more to find other load path or will be slab fail in strength? where do you get this 0.1 or 0.15 from? Is...
Yes, these are meshes for analysis stage only.
This is what I get confused. Take Ram Concept as an example, when you place the 'span segment', does the program read the moments along the span segment only and then divide by the width to get the mean value or does the program adding the moments...
Thanks rapt. I used the same method as you mentioned - same bars throughout with extra bars if required.
I am using FEM as I said - SAFE. I am just not sure how it actually works. I know the design strips are used to pick up peak moments and average out them. So doesn't that mean we need to...
I am using your example to show my concern. I have circled two area that your longitude strips do not 'connect' to the support where max peak moment will be. So what will happen is the design stirp will pick up the moment where circled are and reinforce the whole strip based on the peak moment...
If I have skewed strips then the reinforcement designed won't be in ortho directions, correct? I don't think SAFE offer skew angle feature like Ram Concept does. Then How do you sort this out?
This is actually what confused me. Like you said, the design strip is to average out peak moments. Then how can I arrange 4' wide design strips? Don't I need to make sure that the design strips pass the supports, where peak moments are? But as I want to make them in ortho directions, I cant link...
Thank you everyone. Sorry I didn't make it clear. What I really want to ask is, as I tried to make the design strip or rather reinforcement going in both ortho directions instead of support to support. Take the Y direction near the core wall as an example. Do I need to have multiple design stirp...
Thank you very much rapt.
I notice that some walls have no design strip across in either x or y direction. ie. analysis results of some walls not used in the design strips?
I am using SAFE but happy to learn other experience from Ram Concept too. I want the strip to run along global x and y so running design strips from support to support will make the reinforcement follow principal moment direction (maybe that's what skew angle is for in Ram Concept? I am not...
I have a flat slab with irregular supports. I want the reinforcement to follow the global x & y direction instead of principal moment direction.
So I am thinking having design strips passing each support but I find it very hard to arrange the design strips. Can anyone share your thoughts or if...
