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Existing brick masonry wall - bending

Existing brick masonry wall - bending

(OP)
I am checking the lateral load capacity of an existing brick wall. Shear is straight forward but how do I calculate the horizontal bending capacity?

ACI 530 states that fb = calculated compression stress in masonry due to flexure only, psi

Is the tensile strength of mortar to brick so low that I ignore any strength from tension and only use the "compression zone" of the neutral axis?

If the available strength in the compression side is greater than the total bending stress is that good enough or may horizontal still appear on the tension side?

RE: Existing brick masonry wall - bending

The allowable for unreinforced masonry is pretty straight forward. For tensile stress the calculation is the familiar:

fb= -(P/A) + M/S <Fbt

Where the allowable (Fbt) is in the code. (And typically ranges from about 9-80 psi depending on Mortar types, direction of tension, etc. See Table 2.2.3.2 in ACI 530-05.)

For compression it is:

fa/Fa + fb/Fb <1

Where Fa is also in code (and is dependent on h/r ratio) and Fb=0.33*f'm (IIRC).

RE: Existing brick masonry wall - bending

(OP)
Can you tell me where the equation

RE: Existing brick masonry wall - bending

Quote:

Can you tell me where the equation

Where the equation is in the code? Which one?

RE: Existing brick masonry wall - bending

There are two?

Dik

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