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Profis for adhesive anchors, sometimes uses phi = 1.20 for steel strength

Posted by Timothy Heupover 3 years ago
Profis for adhesive anchors, sometimes uses phi = 1.20 for steel strength

I am attempting to find a solution for a seismic load application. One configuration does not work,
Profis calculates steel strength using phi = 1.20 for steel strength. I tried a longer embedment, and got lesser steel strength (using phi = 0.75). Also for the second configuration, concrete breakout strength decreased, bond strength
decreased. Also, for the shorter embed length, steel strength was not governing case and PROFIS flagged this as violation of ACI 17.2.3.4.3 and said anchorage does not meet design intent. For the longer embed length, steel strength was
also not governing case, and PROFIS did not flag this as violation of ACI and said anchorage does meet design intent. Last, for the longer embed length, steel strength decreased, concrete breakout strength decreased, bond strength
decreased and combined utilization ration increased. Why does increasing embed length result in decreased capacity all around?


(I can only upload one file, I would like to upload another output file and a .pe file, how can I do that?)


steel failure with lever arm,phi factor

2 Replies
Posted by Emily over 3 years ago
Hilti Verified

Hi Timothy,

Please email your .pe file to hnatechnicalservices@hilti.com.

Regards,
Emily

profis engineering

Posted by Timothy Heupover 3 years ago

Emily,
I cut and pasted that email address into an email reply, but Outlook told me that format of the email address is wrong & it didn't send. Can we communicate by email, one time only using the email address in my HILTI account but later I need to update that email address to make it current. Don't want to post that address here though. I don't know how to contact you.