Design of Concrete Elements Using High-Strength Reinforcement-Recent Developments with Respect to High-Strength Steel Reinforcement (PDF)

Recent Developments with Respect to High-Strength Steel Reinforcement (PDF)

Pdf Summary

The document, titled "Steel Reinforced Concrete: It Enables. Adapts. Endures," delves into recent advancements in high-strength reinforcing bars used in steel-reinforced concrete and presented by David A. Fanella at the ACI Spring Convention in April 2016. The report covers a range of topics including bar designations, properties, yield strength determination methods, and relevant standards like the ACI 318-14 code and ASTM specifications.<br /><br />Key aspects discussed include the configuration and classification of bars, with specific focus on high-strength varieties and their standards under ASTM designations. The document outlines the limitations and requirements for different applications, such as seismic systems, concrete confinement, and torsion. Various methods for determining yield strength, such as the yield point method and the offset method, are examined, alongside their appropriateness for certain conditions and materials.<br /><br />The document references research projects that contribute to understanding the role and behavior of high-strength bars in concrete structures. Notably, it cites studies by Paulson et al. (2016), which assess the safety and realism of using the 0.2% offset method for yield strength in nonprestressed reinforcing steel. The studies include parametric examinations of beams and columns with varied concrete and reinforcing bar strengths.<br /><br />Additionally, research by Shin et al. (2016) is highlighted, which investigates the behavior of columns under uniaxial loads using high-strength concrete and reinforcing bars. Their findings reveal that while high-strength longitudinal bars yield in combination with high-strength concrete, their overall contribution to axial load strength is generally limited.<br /><br />Overall, the document serves as a comprehensive overview of advancements in steel-reinforced concrete, emphasizing the adaptability and durability enabled by high-strength reinforcing bars within structural applications.

Keywords

steel-reinforced concrete

high-strength bars

ACI Spring Convention

yield strength

ASTM specifications

seismic systems

concrete confinement

torsion

Paulson research

Shin research