Anchorage into Concrete Pier / Pier Sizing
Anchorage into Concrete Pier / Pier Sizing
(OP)
Hello everyone,
Here is the dilemma. I have a typical building with base shears. The building has steel columns connected with anchor bolts to piers. The piers are reinforced with longituinal reinforcing and has stirrups that ties it all together. I have been trying to determine the anchorage requirements based on ACI requiremnts (Appendix D).
For example, I have a 10" W section, with say a base shear of 35 kips. What happens when I run through the calculations is that concrete breakout strength is always governing, and it tells me I need like a 4'x4' pier to prevent failure. This is rediculous. All the examples given don't have a typical column to pier connection, and its hard to figure out what is going on.
I think the reason my pier is so big is that there is no consideration of the pier steel reinforcing strength in shear.
Does anybody know a good referece example I can follow, or what I am forgetting to consider here. Any adivce will help.
Steven
Here is the dilemma. I have a typical building with base shears. The building has steel columns connected with anchor bolts to piers. The piers are reinforced with longituinal reinforcing and has stirrups that ties it all together. I have been trying to determine the anchorage requirements based on ACI requiremnts (Appendix D).
For example, I have a 10" W section, with say a base shear of 35 kips. What happens when I run through the calculations is that concrete breakout strength is always governing, and it tells me I need like a 4'x4' pier to prevent failure. This is rediculous. All the examples given don't have a typical column to pier connection, and its hard to figure out what is going on.
I think the reason my pier is so big is that there is no consideration of the pier steel reinforcing strength in shear.
Does anybody know a good referece example I can follow, or what I am forgetting to consider here. Any adivce will help.
Steven






RE: Anchorage into Concrete Pier / Pier Sizing
In my view, use PCI Design Handbook for your anchorage design until Appendix D is done in on its own petard.
RE: Anchorage into Concrete Pier / Pier Sizing
Follow the steps given in AISC "Design Guide-1( second edition).
RE: Anchorage into Concrete Pier / Pier Sizing
RE: Anchorage into Concrete Pier / Pier Sizing
RE: Anchorage into Concrete Pier / Pier Sizing
DaveAtkins