Authors:

Charles R Curione

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About Paper:

Anchors, which are steel components used for connecting structural or non-structural elements to concrete, are fundamental in construction. They are subjected to tension, shear, or bending moments. When an anchor group is subjected to a bending moment, such as in the case of column-to-foundation joints, a tension-compression couple is generated. The tension is resisted by anchors, while the compression is transferred into the concrete through the connecting baseplate. This compression increases the tensile capacity of the anchors. Current design guidelines such as American Concrete Institute and Eurocode outlining this effect have certain limitations. They are not valid when the anchor group is located close to one or more edges. Therefore, the design of moment loaded connections in such cases is overly conservative. This paper demonstrates that a revised equation for quantifying the increase in anchor strength is necessary for anchors under bending moments in parallel-edge narrow foundations. Using Finite Element analysis and small-scale experiments, numerical and visual data was collected on both moment-loaded and tension-loaded specimens. The numerical and experimental investigations showed that anchorage was significantly stronger under moment in narrow foundations. Moreover, the moment strength increase factor grew as the anchor-to-edge distance decreased. This study thus concludes that a revised anchorage strength equation is needed for the accurate design of moment-loaded connections in narrow concrete foundations. The revised equation will make the design of foundations safer and more economical. Keywords: Anchorage; Concrete; Civil Engineering; Construction; Finite Element Analysis

Source:

Purdue University / 2025

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Co-authors:

Charles R Curione