DEVELOPMENT OF DEMOUNTABLE CONNECTORS FOR STEEL-CONCRETE COMPOSITE BEAMS

Date

2026-1-05

Author

Arıkoğlu, Pınar

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Demountable shear connectors enhance the sustainability of steel–concrete composite structures by enabling reuse and recycling. Building on this concept, this thesis develops novel demountable shear connector designs that achieve high strength and stiffness with minimal energy consumption and cost, while prioritizing environmental performance through disassembly and reuse. Within this framework, two novel demountable shear connectors are introduced. The first system, referred to as Type-1, is a bolted angle connector (BAC) investigated in both solid slabs and slabs with profiled sheet decking. The second system, Type-2, is a welded angle-bolted connector (WABC), developed for special applications where enhanced ductility is required. Both systems employ high-strength bolts in combination with steel angle or channel sections to ensure efficient load transfer. The study comprises an extensive experimental program involving horizontal push-out, tension, and composite beam tests. Key geometric, material, and loading parameters were investigated. The experimental results revealed that both connectors exhibit ductile behavior with sufficient slip capacity at 6 mm, in accordance with EN 1994-1-1. Beam tests confirmed their effectiveness under various levels of composite action and validated the demountability process. Complementing the experimental work, a finite element model was developed using ABAQUS to replicate the observed behavior. The numerical study confirmed the shear response at 6 mm slip and enabled a comprehensive parametric study. Based on these findings, a design equation was proposed for predicting the shear capacity of the Type-1 connector with high accuracy. This thesis contributes a reusable, high-performance connection solution aligned with structural efficiency and environmental objectives.

Subject Keywords

Demountable Shear Connectors, Sustainability, Recycling, Shear Resistance, Steel-Concrete Composite Construction

URI

https://hdl.handle.net/11511/118368

Collections

Graduate School of Natural and Applied Sciences, Thesis