For years, BETA has been specialized in the production of Shear Connectors for composite decking:
Material S235J2+C450 with the following mechanical properties according toAWS.D1.1/D1.1:2004:
- Tensile strength Rm ≥ 450 N/mm²
- Yield Strenght Rel ≥ 350 N/mm²
- Elongation A5 ≥ 15%
- Notch impact 27J bei -20°
All Shear Connectors are cold formed parts, In-house produced according to DIN EN ISO 13918. Thanks to a large stock, we can guarantee short delivery times. Long Shear Connectors up to 100 mm length can be supplied ex stock, longer sizes upon request.
Stud Shear connectors shall be welded with automatically timed stud welding equipment (i.e. BMH-22i | BMH-30i) connected to a suitable source of direct current electrode negative power. Welding voltage, current, time and gun settings based on past practice.
AWS C5.4, also Recommended Practices for stud welding.
Typical applications for BETA-Shear Connectors
- Composite Bridges
- Anchor Plates
- Through-Deck welding
- Building Construction
Obvious advantages of composite construction with steel and concrete:
- High loading capacity at low construction heights (important for building construction)
- For bridges with spans ranging from abt. 40 to 80 m often the most cost-effective solution
- Wide spans possible, thus allowing large areas free of columns (important e.g. for multi-storey car parks)
- High ductility of the structure, favorable in case of seismic stress
- Simplicity of alteration to installations through clamping connections fitted to the steel beams
- Good fire protection through encased steel beams or beams with concrete cores
- Quick assembly similar to 100 % steel construction; the steel skeleton serves as a working platform
- Easy to dismantle, steel and concrete are easy to separate
- Secure connection between steel and concrete with the help of tested and certified welded-on shear connectors
In composite beam design, headed stud shear connectors are commonly used to transfer longitudinal shear forces across the steel–concrete interface. Present knowledge of the load–slip behavior and the shear capacity of the shear stud in composite beam are limited to data obtained from the experimental push-off tests. For this purpose, an effective numerical model using the finite element method to simulate the push-off test was proposed. The model has been validated against test results and compared with data given in AISC or Load & Resistance Factor Design Spec. codes. Parametric studies using this model were preformed to investigate variations in concrete strength and shear stud diameter. The finite element model provided a better understanding to the different modes of failure observed during experimental testing and hence shear capacity of headed shear studs in solid concrete slabs.