it's ramadan , no one came to work except me .. so i wanted to share with u guys what i do at work . what do u think about the plans i've designed , any suggestions? Software used : Archicad ( cuz the architest i work for uses only this software )
its enough i guess xD the columns for exmple, after calculating , need like 7cm2 of reinforcement so 4 bars of T12 will do the job, but the algerian code suggests using 8 bars, used 8 bars of T12 same for tge beams and stairs, reinforcement isn't a big deal, compared to the siesmic behaviour of the structure and the fondations.
thanks , sure so for example this is a floor plan , like a simplified upper view of the slab and other details like stairs case, shear walls, columns etc here's some infos about different types of slabs: link as you can see on this exmple : 4: is a shear wall : a reinforced concrete wall that could be used to retain soil for underground floors ( parkings for exmple ) and as a shear ressisting element, vertical forces in buildings work as shearing forces , they make the structure move and shear the connection points so we added this wall to rigidify the structure, reduce displacement. for example, when u have a table that moves, u add an "L" thingy to reduce the movements, that's exactly the same thing in buildings 2: balcony ( generally from 0.4-2m with a 12cm thickness) 3 counterweight slab to make sure the balcony stays stable. ( the length is generally 2/3 of the balcony's length and with a 20cm thickness cuz the floor slab is 20) 1 : represents a 16+4 deck slab ( the hight of the hollow block is 16cm + 4cm of concrete thickness if , it looks something like this : i'll skip all the boring elastic and material theories for dimensioning the elements* so to choose the type of the deck slab ( 16+4 16+5 20+4 etc..) I search for the longest distance between two columns ( from the architectural plan ) and divide that length by 22.5 exmple : let's say the longest distance is 4.5 so we calculate 4.5/22.5 ,( it should be 4.5/25 and 4.5/20 but we use 22.5 directly) the result is 0.2 it means that we can use 16+4 for the beams: length between 2 axes /12.5 exmple : 4.5/12.5 = 0.36 so we major it to 40 ( cuz we can use only 25-30-35-40-45...etc ) so it's a 30X40 beam there are 2 kinds of beams on a two-way slab, primary beam that resists most of the loads ( direction of slab ), in French " Poutre principal " that's why i name them P1,P2P3..etc the secondary beam serves as chaining that's why they're names CH1 CH2 ..etc for the columns, i generally use only 30x30 ( minimum dimension of the zone of most projects i've designed, the minimum of a higher risk zone might be different ) and start the seismic analysis.on a software called etabs if the axial force of a column is too big ( failure of the column, i just change it to a bigger one 30x35 or 30x40 for example) then I verify the seismic behavior and need to verify : a-the shear forces at the base. b- the dynamic period of the structure should not be bigger than 130% of the static period c- the participation mass factors need to be more than 70% ( it means at least 70% of the elements need to move at the same time and direction example: a beam supported by 2 columns if an earthquake would hit, all the structure should move at the same time if 1 column doesn't participate the structure will fail. what should i talk about next? calculating reinforcements is boring and no one cares about the economy of it since we have to follow the code so i use the software x) here are more detailed plans I've made if you are interested: