What appropriate load combination for tank leak test
What appropriate load combination for tank leak test
(OP)
Hi guys, i was designing a wastewater RC tank on ground. I am taking 1.4(D+F) for operation case, F as fluid load. My design basis calls for American Codes (ASCE. ACI350) and such operation load case is clearly defined. But i could not find in the codes on how to deal with leak test load combinations. Am i going to take such fluid as live load 1.2D + 1.6 Water Test? Some of my colleagues are suggesting to take alternative load comb 1.4D + 1.7Test, which i felt is too much for the situation. I'll be thankful for any help to enlighten me.
RE: What appropriate load combination for tank leak test
Or you can do what we do and use 2.21 times the fluid loads for bending and 1.7 for shear to whatever you have as a passive overflow, like the tops of walls.
RE: What appropriate load combination for tank leak test
Also, as with this Sd, i read from ACI350 that Sd could be ignored when load combination is with seismic. I was thinking maybe the reason was that seismic load is only short term. If my intuition is correct, then i could also ignore Sd for wind and for test load, since they are not long term forces. I may be wrong, would be thankful to be enlightened
RE: What appropriate load combination for tank leak test
You're right, SD can be ignored when combined with seismic. But seismic is likely to not control vs. the overflow level on the vessel.
One last piece of advice; these tanks, full of wastewater or water, are not to be trifled with. I can't mentor you, but someone should be watching.
RE: What appropriate load combination for tank leak test
RE: What appropriate load combination for tank leak test
RE: What appropriate load combination for tank leak test