Design Method for Tension Load Capacity of Post-Installed Bonded Anchor Bolts and Associated Issues
By K. Nakano, Y. Matsuzaki and T. Sugiyama
Concrete Journal, Vol.51, No.3, Mar. 2013
- Synopsis
- Given the same tension load capacity, the anchorage length of post-installed bonded anchor bolts is extremely short compared with the anchorage length of cast-in-place anchor bolts. Under the Architectural Institute of Japan's "Design Recommendations for Composite Construction, Part 4: Design Recommendations for Anchor Bolts" revised in 2010, the design of the anchorage zone of anchor bolts is based on the concept that the anchorage zone is the same regardless of whether anchors are cast in place or post installed. With regard to the design method for the tension load capacity of bonded anchors, this study investigates whether evaluation based on the maximum load determined from the bond strength between the adhesive and concrete is appropriate, and proposes a tension load capacity evaluation formula. Further, it verifies that the estimates of bond strength, which declines as the result of the edge distance effect and group effect, among other things, are equivalent with the bond strengths used for cast-in-place deformed bars.
- Keywords:
- Post-installed bonded anchor bolts, tension load capacity, allowable tensile force, bond strength, edge distance, group effect, anchorage length
