Authors:

Lainie Rapp

Date Created:

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About Paper:

This research aims to understand the out-of-plane shear strength and direct shear mechanism of steel-plate composite (SC) members through static experiments. SC structures comprise two steel faceplates enclosing a concrete core, connected by steel tie bars, and potentially reinforced with shear studs. Direct shear failure in reinforced concrete structures refers to the abrupt shearing of a concrete member at its supported ends under severe blast loading conditions. Previous studies have not investigated the direct shear mechanism in SC or with shear span-to-depth ratios less than 1.0. A large-scale SC member with a shear span-to-depth ratio of 0.8 was tested statically to failure to confirm that the AISC N690-18 design guide shear strength equations are not representative of out-of-plane shear strength with ratios less than 1.0. The tested specimen included an SC beam with tie bars and part of a slab-to-wall connection on each end of the specimen which introduces a geometric discontinuity in the concrete. The AISC N690-18 out-of-plane shear strength capacity was calculated and compared to the experimental out-of-plane shear strength based on the maximum applied load. These results revealed that the AISC N690-18 design guide equations do not account for the actual out-of-plane shear strength of SC specimens with shear span-to-depth ratios less than 1.0, as the experimental values obtained drastically exceeded predicted values.

Source:

Purdue University / 2023

Topics:

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Co-authors:

Lainie Rapp