Reinforced concrete design alpha<0.7 problem

[erkansucin]

I am getting alpha<0.7 problem and maximum pursansaj errors in the project I designed, I would appreciate it if you could help me

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[unver]

Hi My Suggestions: --Fix the errors in the geometry control, --Remove the basement floor rigidities, --Mark the basement floor curtains as non-continuous on all floors, --Mark TS498 live load reduction, --You can increase the width of the beams carrying the ribs, --You can increase the beam widths in the attic reduce the loads, remove the wall loads, --Make the ladder support and solve it together, --If necessary, you can increase the ground safety by 50%, --Most importantly, put additional earthquake curtains in both directions on your building, which is in the 1st degree earthquake zone and has more openings.[ /b] Unver ÖZCAN

 

[proisa]

Your basement is not rigid in either direction, but you entered it as a rigid basement. All of the wall loads, including the last floor, are entered as a 20-inch wall. Floor loads are all entered the same. Q=0.25 t/m2 is not a standard live load. How did you get such a value? See TS 498. The high relative storey drift of the building is due to insufficient rigidity. Column sections and beam depths are insufficient. Increase the thickness of the tiles that give an insufficient slab thickness error. Correct the errors mentioned there by checking the geometry. The building period is very high for a B+3 storey building. Especially the X direction is much weaker than the Y direction. Moreover, even the Y direction is not rigid enough. Design keeping in mind the dimensions of standard hollow block fillers. If the floor thickness is 7 cm; I recommend that you make the beam heights at least 37cm. Your openings are great. There are standard filling materials with a height of 30 cm. Teeth space is 40cm normal. I recommend that you seek help from experienced colleagues around you.

 

[erkansucin]

Your basement floor is not rigid in both directions, but you have entered as a rigid basement. Wall loads including the last floor are all entered as 20' wall. Floor loads are all entered as the same. Q=0.25 t/m2 standard It is not a live load. How did you get such a value? See TS 498. The high relative floor drift of the building is due to insufficient rigidity. The column sections and beam depths are insufficient. Increase the thickness of the slabs that give an insufficient slab thickness error. By checking the geometry, the errors specified there Fix it. The building period is too high for a B+3 storey building. Especially the X direction is much weaker than Y. Moreover, even the Y direction is not rigid enough. Design keeping in mind the dimensions of standard hollow block filling materials. If the slab thickness is 7 cm; I recommend you to make their height at least 37cm. Your openings are large. Standard filling materials are available at 30cm height. The tooth spacing is 40cm. I recommend that you seek help from your experienced colleagues in your field.

I have solved most of the errors. Thank you. But I could not overcome the problem of high floor drift relative to the 1st floor.

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[unver]

Hello --As I suggested before, when you add curtains and make adjustments to the beams, it is balanced, --When the floor D14s where the elevator is located are faulty, it is necessary to put beams on the gap edges when such a large gap, --Place rib beams on the gap edges so that the ribs do not pass through the gaps in the rib slabs, -- Fix column B errors, Balanced proposal project attached. Unver ÖZCAN

 

[erkansucin]

Hi --As I suggested before, it is balanced when you add curtains and make adjustments to the beams, --The floor D14s where the elevator is located are faulty. so that ribs do not pass, put rib beams on the gap edges, -- correct column B errors, Balanced proposal project is attached Ünver ÖZCAN

Hello Ünver, can there be a reason for excessive reinforcement on polygon columns?

 

[unver]

Make the narrow side of the polygon columns 25 cm less than 30 cm. If it were me, I wouldn't make the narrow side of the column 35 cm less in the holster.

 

[erkansucin]

Make the narrow side of the polygon columns 25 cm less than 30 cm. If I were you, I would not make the narrow side of the column 35 cm less in the hollow block.

In the current situation, the narrow sides are 30 cm