Designing the concrete slabs - Eurocode 2

[Pretty Girl]

I noticed that it's easy to feed the moments to Eurocode equations and get the reinforcement required etc (of course with many checks in between to design it properly).

We still need to calculate the moments before we feed it to Eurocode.
However, in Eurocode 2, I didn't notice easy method to calculate moments as BS8110 had in it.

So, I was wondering if we can use the method stated in BS8110 as there's a way to calculate moments easily (at the ends, sagging, hogging etc) with coefficients (BS8110, table 3.14, page 38).

Does Eurocode2 have such easy way or we have to rely on BS8110?

I know mixing two codes together is not good. But I don't really see a problem as well in this case as it serves two seperate things. Am I correct or wrong?
I don't want to make the calculations complicated, I want to design fast, I only want to make safe structures for real-life situations. So, It's ok if it's conservative and bit expensive than precise FEA methods.

I'm not quite sure if the BS8110 coefficients method is only for rough calculations and not for serious design. However, I think they have included it NOT for rough calculations, and ok for real-life design.

Is it ok to use it that way? Plugging the BS8110 coefficients --> get design moments --> input of Eurocode 2 --> safe slabs for real-life use?

 

[HTURKAK]

However, in Eurocode 2, I didn't notice easy method to calculate moments as BS8110 had in it.

So, I was wondering if we can use the method stated in BS8110 as there's a way to calculate moments easily

You are right at this point. Eurocode 2 is silent for specific guidance on determining moments and shear forces. This is valid for other topics since it is European practice to give principles in the codes . If the corners of slabs are prevented from lifting, the coefficient method can be used .
You can use the coeff. given in any structural engineering book, Betonkalender , BS 8110 .
Other methods FEM , Plate grillage method,...

 

[Pretty Girl]

You are right at this point. Eurocode 2 is silent for specific guidance on determining moments and shear forces. This is valid for other topics since it is European practice to give principles in the codes . If the corners of slabs are prevented from lifting, the coefficient method can be used .
You can use the coeff. given in any structural engineering book, Betonkalender , BS 8110 .
Other methods FEM , Plate grillage method,...

@HTURKAK
Thank you for the response and the book reference.

Usually slabs are monolithically connected to beams in buildings, so it satisfies the "prevented lifting from the corners". I believe the simply supported etc is the situation that it can lift from the corners?
Or is there any other dividing line to decide if the slab is prevented/not prevented from lifting?.
If it lifts from the corners that means no hogging moments, so we can design as usual without using the coefficients. I'm correct or wrong?

For fast and safe calculations which method would you use if you wanna simplify it (for example, calculating in excel)? I believe FEM is not fast.
How about I just treat the slab as a beam of 1 m wide? and just calculate the sagging and hogging moments. Will it be safe for two way slabs for real-life situations?
If I use that method, I can avoid using the "1/8 strips and coefficients" stated in BS8110. So I can effectively avoid mixing BS codes with Eurocode.

But coeficient method is even faster right? I guess it has limitations like the lx/ly effective lenth ratio shouldn't be more than 2 etc. So in that situations we should use that "beam of 1 m wide" method?

So, better choice seems to be calculating the hogging and sagging moments manually by considering both ends are fixed and considering the slab as a beam (without coeffients) and then plug that moments to Eurocode to get the design?
But I guess we can't use that for continuous slabs with ease.

Any suggestions for continuous multi panel slabs (as usually buildings are in this format)?