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This webinar was co-sponsored by ASCE's Structural Engineering Institute (SEI) and ASCE Continuing Education
INSTRUCTOR:
Alexander Newman, P.E., F.ASCE
Purpose and Background
Adhesive anchors, as any post-installed anchors, offer certain advantages over cast-in anchor bolts. For example, using adhesive anchors after the structure is in place helps avoid the common problem of dealing with anchor bolts cast in the wrong location. However, successful performance of adhesive anchors depends on using correct methods of their design and installation. After a number of recent high-profile failures, design and behavior of adhesive anchors have been subjected to a heightened scrutiny. The webinar provides a practical introduction to the design of adhesive anchors.
This webinar provides an in-depth look at the complexities of designing and installing adhesive anchors in concrete structures. The session covers how adhesive anchor design has evolved due to high-profile failures, making current design provisions more rigorous and detailed. It explores key differences between adhesive and cast-in-place anchors, discusses various adhesive types and installation methods, and emphasizes the importance of following code provisions, specifically ACI 318 and ACI 355.4. Additionally, it highlights the critical role of installation quality, including hole cleaning and proper curing, in ensuring anchor performance. The second half of the presentation describes real-world challenges, failure modes, and lessons from past incidents, such as the Big Dig tunnel collapse, reinforcing the need for careful design and inspection. Overall, the session serves as a comprehensive guide for engineers, providing both technical insights and cautionary advice on using adhesive anchors effectively.
Benefits and Learning Outcomes:
Upon completion of this course, you will be able to:
- Describe the differences between cast-in anchors and adhesive anchors, including their installation processes and applications.
- Identify key failure modes of adhesive anchors, such as bond failure, concrete breakout, and steel fracture.
- List the major provisions of ACI-318 and ICC-ES AC308 that govern the design and installation of adhesive anchors.
- Explain the impact of installation conditions, such as hole cleaning, temperature, and moisture, on the performance of adhesive anchors.
- Discuss the lessons learned from past failures, including the Big Dig incident, and the recommendations for improving the reliability of adhesive anchor installations.
Assessment of Learning Outcomes
Students' achievement of the learning outcomes will be assessed via a short post-test assessment (true-false, multiple choice, and/or fill in the blank questions).
Who Should Attend?
Structural and civil engineers seeking to increase their knowledge of designing adhesive anchors.
How to Earn your CEUs/PDHs and Receive Your Certificate of Completion
This course is worth 0.2 CEUs/2 PDHs. To receive your certificate of completion, you will need to complete a short post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.
How do I convert CEUs to PDHs?
1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]