Torsion Strength of Concrete Beams with Steel Fibers, Lightweight, or FRP: Data Driven Code Appraisal

Abstract

Despite extensive research efforts directed toward the shear and torsional behavior of concrete elements, torsion strength remains an unexplored area. Numerous new materials are being used in construction as a result of advances in concrete technology. The use of lightweight concrete, steel-fiber reinforced concrete, and FRP-reinforced concrete are all kinds of advancements. The objective of the current work is to enhance torsion strength prediction for these three aspects. A summary of a series of power equation models for torsion strength based on a massive experimental database of 346 beams tested under torsion is outlined. The model validation is discussed. The developed models are accurate while remaining simple for design purposes.