<p>Embedded plates are used to support the external attachments
such as heavy piping, brackets, sprinkler systems, or other equipment in
nuclear power plants. The plates are welded with deformed reinforcing bars or
deformed wires and anchored to reinforced concrete walls. The ACI code (ACI
318-19/ACI 349-13) provides design equations to calculate the anchor strength
in concrete under tension load. These empirical equations are based on
experiments conducted on headed studs, hooked bars, headed bolts, and adhesive
anchors. With the lack of experimental data and code provisions on straight
deformed reinforcing bars or deformed wires used as anchors, it is believed
that anchoring bars with the embedment length as per code prescribed
development length will provide sufficient strength to transfer tensile forces
to the concrete, ignoring other failure modes such as concrete breakout. </p>
<p>In this study, eight
large scale group anchor tests were performed to evaluate their concrete
breakout strength as per ACI 349-13. The test specimens were made with deformed
reinforcing bar anchors (DRAs) and deformed wire anchors (DWAs). The tests
included the effect of different bar types, bar sizes, and anchor spacings on the
breakout capacities of such connections. The mean average back-calculated
effective <i>k </i>value is 33.25 for DRAs and 36.26 for DWAs. The experimental study confirms that the axial tension
capacity of embedded plates anchored to concrete using deformed
reinforcing bars or deformed wires can be
limited by concrete breakout strength.</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/12735710 |
| Date | 15 January 2021 |
| Creators | Ata Ur Rehman (9183341) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/TENSION_STRENGTH_OF_EMBED_PLATES_WITH_WELDED_DEFORMED_BARS_AS_GOVERNED_BY_CONCRETE_BREAKOUT/12735710 |
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