Authors:

Priyanka Ghadiyaram

Date Created:

Not specified

Course Title:

Professor:

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About Paper:

Anchorages in concrete are critical systems used to secure structural elements, such as steel beams, to concrete foundations. They ensure safe load transfer, maintaining the stability and integrity of structures like buildings, bridges, and tunnels. A typical anchorage comprises a steel base plate that distributes loads through a group of heavy-duty mechanical fasteners known as anchors, which then transfer these forces into the surrounding concrete. These anchor groups are typically designed following EN1992-4 in Europe or ACI 318-19 in the US. However, these design codes often assume rigid base plates and limit anchor configurations to rectangular groups. In practice, base plates experience bending depending on anchor spacing, plate thickness, and stiffness. This bending leads to redistribution of forces within the anchor group which is not captured by conventional code-based methods, which can lead to unconservative designs. This study presents a non-linear spring model where anchors are modeled as non-linear tension-only springs, the base plate is modeled using eight-node hexahedral elements, and compression-only springs are attached below the plate to simulate the concrete support. The tensile behavior of concrete, particularly for concrete cone failure of anchors, is incorporated in the anchor spring characteristics. The developed model is validated against experimental results and is shown to effectively capture base plate bending, non-linear behavior, and redistribution of anchor forces within the group. Keywords: Anchors; Base Plate; Concrete; Bending; Tension-Only

Source:

Purdue University / 2025

Topics:

No topics listed

Co-authors:

Priyanka Ghadiyaram