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Computers and Concrete Volume 32, Number 5, November 2023 , pages 499-511 DOI: https://doi.org/10.12989/cac.2023.32.5.499 |
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Numerical investigations on anchor channels under quasi-static and high rate loadings - Case of concrete edge breakout failure |
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Kusum Saini, Akanshu Sharma and Vasant A. Matsagar
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| Abstract | ||
| Anchor channels are commonly used for façade, tunnel, and structural connections. These connections encounter various types of loadings during their service life, including high rate or impact loading. For anchor channels that are placed close and parallel to an edge and loaded in shear perpendicular to and towards the edge, the failure is often governed by concrete edge breakout. This study investigates the transverse shear behavior of the anchor channels under quasi-static and high rate loadings using a numerical approach (3D finite element analysis) utilizing a rate-sensitive microplane model for concrete as constitutive law. Following the validation of the numerical model against a test performed under quasi-static loading, the ratesensitive static, and rate-sensitive dynamic analyses are performed for various displacement loading rates varying from moderately high to impact. The increment in resistance due to the high loading rate is evaluated using the dynamic increase factor (DIF). Furthermore, it is shown that the failure mode of the anchor channel changes from global concrete edge failure to local concrete crushing due to the activation of structural inertia at high displacement loading rates. The research outcomes could be valuable for application in various types of connection systems where a high rate of loading is expected. | ||
| Key Words | ||
| anchor channel; concrete edge failure; dynamic analysis; high rate loading; microplane model; rate sensitivity; shear behavior; structural inertia | ||
| Address | ||
| Kusum Saini and Vasant A. Matsagar: Department of Civil Engineering, Indian Institute of Technology (IIT) Delhi, Hauz Khas, New Delhi-110016, India Akanshu Sharma: Lyles School of Civil Engineering, Purdue University, West Lafayette 47907 IN, USA | ||