A Novel Unilateral Push-Out Test Method for Evaluating Shear Connectors in Composite Beams
DOI:
https://doi.org/10.55640/irjaet-v02i10-05Keywords:
Composite Beams, Shear Connectors, Push-Out TestAbstract
Purpose: This study introduces and validates a novel unilateral (one-sided) push-out test method designed to overcome the practical and logistical challenges associated with traditional two-sided push-out tests for shear connectors in composite beams. The standard test, while effective, often requires complex and symmetrical specimen fabrication, which can be inefficient and unrepresentative of single connector behavior.
Design/Methodology/Approach: A series of laboratory experiments was conducted on new one-sided push-out specimens. The specimens were designed to replicate the shear connection between a steel section and a concrete slab using headed stud shear connectors. The novel test setup was instrumented with load cells and linear variable displacement transducers (LVDTs) to accurately measure the load-slip behavior. The experimental data on ultimate shear capacity, stiffness, and ductility were collected and analyzed.
Findings: The experimental results demonstrate that the novel one-sided push-out test provides reliable and consistent data on the shear capacity and behavior of the connectors. The measured values for ultimate shear resistance and load-slip characteristics are comparable to those reported in the literature for traditional two-sided tests, confirming the new method's validity. The findings highlight the test's practicality, requiring less material and a simpler setup, thereby reducing testing time and cost. The study also observed typical failure modes, primarily characterized by stud shearing or concrete failure.
Originality/Value: This research presents a significant advancement in the testing of shear connectors by proposing a simplified, yet highly effective, experimental protocol. The novel unilateral push-out test provides a valuable alternative for engineers and researchers, enabling more efficient and cost-effective evaluation of both conventional and innovative shear connectors. The findings contribute to the knowledge base of composite structures and lay the groundwork for a potential update to international testing standards.
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Copyright (c) 2025 Dr. Larian D. Venorth, Prof. Maevis K. Durand (Author)
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