huangyhg

load due to velocity of water
i have a question regarding the generally accepted practice of calculating forces on a stationary structural element due to water moving past it. essentially, i have a cantilevered pipe affixed to a stationary block. the pipe will have instruments attached to it. i need to design the pipe and the connection of the pipe to the block.
from aashto section 3.18., the effect of flowing water on piers can be calculated by the formula:
pavg = k * (vavg)^2
where,
pavg = average stream pressure in psf
k = 0.7 for circular piers (similar to your pipe?) or 1.4 for square-ended piers
vavg = average velocity of water in feet per second
hope that helps.
broekie,
is there a limit on the width of the pier?
what if it's a wall?
sorry, i don't have the ref material so maybe it's indicated there.
thanks
check out asce 7, chapter 5. also the fema, "coastal construction manual," and the usace's "shore protection manual" can be found through a google search on the titles.
no limits are listed in aashto.

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