Expansion joint/movement joint in g+2 building
Expansion joint/movement joint in g+2 building
(OP)
I'm designing a factory building whose dimensions are 100' x 400'. It's a concrete moment resisting frame. No shear walls. I've provided an expansion joint dividing the building in two parts of 100'x200'. When I calculated in-elastic displacement "delta M" for two buildings and calculated the joint width as per IBCcode , it's coming around 9 inches wide which seems too much for a G +2 building in seismic zone 2B. Architect is not willing to provide this wide joint as only an inch or 2 in wide joints are in common practice . Want to know how much widths other engineers have provided. Anybody experiencing same difficulty? Am I calculating the right way?






RE: Expansion joint/movement joint in g+2 building
Regards
RE: Expansion joint/movement joint in g+2 building
I would be reluctant to reduce the gap just due to the building type (g+2). The two sections would still hammer together in a seismic event and people to occupy such buildings.
Perhaps you can also try to stiffen the building to minimize deflections. How tall is it?
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RE: Expansion joint/movement joint in g+2 building
RE: Expansion joint/movement joint in g+2 building
RE: Expansion joint/movement joint in g+2 building
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RE: Expansion joint/movement joint in g+2 building
RE: Expansion joint/movement joint in g+2 building
Also - potential foundation settlements would also affect the framing but that is true with the expansion joint as well as without.
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