Wind analysis on a wall with two types of masonry

As-Lag · Feb 6, 2021

Hello

I am trying to check a wall subject to wind load. The wall is part of a portal-frame warehouse and the masonry is restrained at each column, pinned at the top and dpc at the base. The panel is 4500 mm long and 3320 mm high. The wall was constructed in two parts. The first part is cavity-wall from the dpc to 1210 mm. The remainder of the wall is 100 mm concrete blocks laid on their side to a height of 1970 mm. Please see image.

My question is, how should I deal with the joint at 1210 mm please?

Regards

XR250 · Feb 7, 2021

Wow, that's a tough one. Seems like a bad idea w/o reinforcement. So in my world, that is about 15 ft. x 11 ft.
I would try to rationalize the wall spanning horizontally and ignore the joint. 15 ft. may be a stretch, however.
Are the wall cavities connected by wire?
I suppose you could check the flexural tension of the one 4" wythe with full bearing and see if that flies.

As-Lag · Mar 23, 2021

XR250

Thanks.

What I did was work out the moment at the joint and did a stress-test on the brick inner-skin. I then had the builder put a brick skin around the columns and tied back to the blocks so stiffening the wall. I then checked the wall as a composite panel. The calculations passed and the job was signed off.

Have to admit though, I still think I 'winged' it.

Regards

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Wind analysis on a wall with two types of masonry

As-Lag

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