Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Epoxy Anchorage - Bond Strength in accordance with ACI 318-14 Section 17.4.5

Epoxy Anchorage - Bond Strength in accordance with ACI 318-14 Section 17.4.5

Epoxy Anchorage - Bond Strength in accordance with ACI 318-14 Section 17.4.5

This is a technical question regarding the 318-14 Building Code Section 17.4.5: The equations for bond strength in tension appear to have a "glitch". The tensile capacity should be a function of the effective length of the bond. However, the critical edge distance is also a function of the bond length; this critical edge distance ends up in the denominator of a ratio, causing the bond length to "cancel out" of the equation. So, you see, I am up a creek without a paddle.

FYI: I have tried to contact ACI regarding this; however, they require membership for this inquiry.

Please respond ASAP as I have a client waiting! Thank you.

Richard L. Flower, P. E., LEED Green Associate
Senior Structural Engineer
Complere Engineering Group, Inc.

RE: Epoxy Anchorage - Bond Strength in accordance with ACI 318-14 Section 17.4.5

The basic bond strength of a single anchor, Nba = λa τcr Π da hef ==> dependent on hef

The edge effects are taken care of with the ψed,Na factor, and that will range between 0.7 and 1.0; based upon ψed,Na = 0.7 + 0.3 (camin/cNa); with cNa dependent on the anchor diameter, da.

The nominal bond strength in tension is Na = ψed,Na Nba (neglecting cracked/uncracked concrete factor ψcp,Na). This is direct multiplication of factor/s x capacity.

I don't see where the effective embedment depth hef cancel out.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close