Shear wall for basement of residential building in sap2000?
Shear wall for basement of residential building in sap2000?
(OP)
My problem is very simple. Generally my buildings have following dimensions.
Building type: RCC Basement + 5 storied.
General column size used 14" x 14" at perimeter and 16" x 16" and some time 18" x 18" at internal.
Concrete used M25 in column and M20 in beam and slab
Re-bar used are TMT fe500 (combination of 16mm and 20mm and 8mm for stirrups)
foundation isolated and eccentric with bearing capacity 200 kn/m2
height of basement is 10' (out of which 8' concrete wall is surrounded by back-fill soil} i.e. 2' share wall is exposed above ground
shear wall thickness is 6" with two layer of reinforcement, wall braced in all side with column and beams)
depth of foundation 6' deep from basement (for isolated footing)
questions:
should i really consider these share wall in analysis? its only 8' of lateral earth pressure?
share wall also take part in sharing vertical load along with column? which reduced the % of reinforcement in column at basement.
when i model lift shaft (rcc) the results are very much different (reinforcement in surrounding columns (around rcc lift) are reduced to minimum requirements 0.8% ). its only basement+5 storied, can i go for brick for shaft wall?
Am i missing something or i am ignoring elephant in this matter? not sure what am i supposed to do.
Please drop your any comments and suggestion regarding this and any related matters. even discussion will help me and lots of people.
Building type: RCC Basement + 5 storied.
General column size used 14" x 14" at perimeter and 16" x 16" and some time 18" x 18" at internal.
Concrete used M25 in column and M20 in beam and slab
Re-bar used are TMT fe500 (combination of 16mm and 20mm and 8mm for stirrups)
foundation isolated and eccentric with bearing capacity 200 kn/m2
height of basement is 10' (out of which 8' concrete wall is surrounded by back-fill soil} i.e. 2' share wall is exposed above ground
shear wall thickness is 6" with two layer of reinforcement, wall braced in all side with column and beams)
depth of foundation 6' deep from basement (for isolated footing)
questions:
should i really consider these share wall in analysis? its only 8' of lateral earth pressure?
share wall also take part in sharing vertical load along with column? which reduced the % of reinforcement in column at basement.
when i model lift shaft (rcc) the results are very much different (reinforcement in surrounding columns (around rcc lift) are reduced to minimum requirements 0.8% ). its only basement+5 storied, can i go for brick for shaft wall?
Am i missing something or i am ignoring elephant in this matter? not sure what am i supposed to do.
Please drop your any comments and suggestion regarding this and any related matters. even discussion will help me and lots of people.






RE: Shear wall for basement of residential building in sap2000?
RE: Shear wall for basement of residential building in sap2000?
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RE: Shear wall for basement of residential building in sap2000?
RE: Shear wall for basement of residential building in sap2000?
I wouldn't think of using a brick lift shaft in a RC building. And I wouldn't use less than 1% steel in the columns. Your program is telling you that the lift shaft is acting as a shear wall, and you need to reinforce it as such. Pay special attention to the wall with door penetrations.
RE: Shear wall for basement of residential building in sap2000?
Yes you are right minimum thickness is 8" for double reinforcement, i was wrong here. :D. I also don't use minimum % of steel in column. In other had shear wall is at basement only so i guess its not problem, is it? Actually i don't consider share wall at basement level for analysis and only provide minimum reinforcement as code provision.
But i don't want to ignore about this for lift shaft. If Any tips?