Shear Capacity of Self-Compacting Concrete Beams provided by External Steel Plate using Z Stirrups
Received: 10 October 2024 | Revised: 4 November 2024 | Accepted: 4 December 2024 | Online: 2 February 2025
Corresponding author: Douaa Kasim
Abstract
The stirrups are the primary factor that resists the shear forces, while other parameters like aggregates and dowels contribute less than 7% of the shear strength. Shear connectors transmit the shear forces in composite beams between steel parts and concrete, and these connectors can be utilized as vertical legs to assist the stirrups in their performance. The results indicate that decreasing the shear span to effective depth (a/d) ratio from 3 to 2.5 led to a 24% increase in the crack load and a 16% increase in the maximum load value. Additionally, the shear connectors have a significant effect on increasing the shear capacity, and this effect becomes more pronounced as their lengths increase, effectively replacing the function of the stirrups. Furthermore, the change in the shape of the stirrups does not significantly affect the shear capacity, and the decrease in endurance can be compensated by reducing the distance between the stirrups. It was also observed that the horizontal parts of the stirrups may have a limited and negligible effect, suggesting that the stirrups could potentially be replaced by I-shaped alternatives.
Keywords:
bendable concrete, self-compacting concrete, external steel plate, Z stirrupsDownloads
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