DAM Yi
DAM Yi
(OP)
I am a little confused on exactly what Yi is in the Direct Analysis Method. Is Yi the total weight of the structure at level i, or is it the loads applied to the frame at level i?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: DAM Yi
Try this to prove it to yourself.
Create a 2-3 story frame and assign some load at each level. Displace the frame to the right by H/500 at each story. Now compute the overturning moment about the base.
Now, use the same frame, except not pushed to the right by H/500. Add notional loads equal to 0.002*Yi at each level, where Yi = the vertical load at Level i. Now compute the overturning moment due to these notional loads and see that it's the same as the one computed per the previous paragraph.
RE: DAM Yi
RE: DAM Yi
So the lateral load I apply to the frames are suppose to be 0.002*(the total load applied to level i).
RE: DAM Yi