AS3600 - WALLS DESIGNED AS COLUMNS
AS3600 - WALLS DESIGNED AS COLUMNS
(OP)
HI ALL,
As per 11.2.1 (a) (ii) and (b) (ii), if the walls are designed as columns, the clause 10.7.1 (a) ( columns to have atleast 0.01Ag reo) applies. I am trying to use lightly reinforced "non ductile" structural walls (mu = 1) in my project (not including the shear walls). These walls are precast walls and I want to use SL92 MESH each face. By providing vertical pw < 0.01 and horizontal pw > 0.0025, I can override the restraint requirements of 10.7.4. But the SL92 MESH each face is less than the 0.01Ag requirements of 10.7.1.
These walls (esp the ones in the ground floor) are quite heavily loaded in compression (N* > 0.5phiNu), but I am not relying on the reinforcement for compressive strength, concrete alone is enough. I read in the AS3600 supplementary that the 0.01Ag requirement for reo can be ignored if Asc*Fy > 0.15N* because the reinforcement should take atleast 15% of the compressive load. Does that mean there is no way around this clause? I have to provide N16-200 each face to meet the requirements of 10.7.1?
Thank you in advance.
As per 11.2.1 (a) (ii) and (b) (ii), if the walls are designed as columns, the clause 10.7.1 (a) ( columns to have atleast 0.01Ag reo) applies. I am trying to use lightly reinforced "non ductile" structural walls (mu = 1) in my project (not including the shear walls). These walls are precast walls and I want to use SL92 MESH each face. By providing vertical pw < 0.01 and horizontal pw > 0.0025, I can override the restraint requirements of 10.7.4. But the SL92 MESH each face is less than the 0.01Ag requirements of 10.7.1.
These walls (esp the ones in the ground floor) are quite heavily loaded in compression (N* > 0.5phiNu), but I am not relying on the reinforcement for compressive strength, concrete alone is enough. I read in the AS3600 supplementary that the 0.01Ag requirement for reo can be ignored if Asc*Fy > 0.15N* because the reinforcement should take atleast 15% of the compressive load. Does that mean there is no way around this clause? I have to provide N16-200 each face to meet the requirements of 10.7.1?
Thank you in advance.
Talk To Other Members
RE: AS3600 - WALLS DESIGNED AS COLUMNS
Are you designing the shear walls for a different mu value? You cannot do that - the whole structure needs to be designed for the same mu.
I don't think there is.
RE: AS3600 - WALLS DESIGNED AS COLUMNS
RE: AS3600 - WALLS DESIGNED AS COLUMNS
11.2.1.a.ii & b.ii have been updated to refer to 10.7.1.b only (4% max reo limit). When checking a wall segment 'as a Column' the lower limits are the normal 0.15% / 0.25% to 11.7.1 or that required by the Column design check.
Remember to keep clause 11.7.4 in mind, which has been expanded on in amendment 2.
RE: AS3600 - WALLS DESIGNED AS COLUMNS
I need to refresh my memory of those clauses.