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

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

Video Transcription

Video Summary

The presentation focused on understanding the use of high-strength reinforcing bars in reinforced concrete, emphasizing ACI 318-14 provisions for different steel grades. Key points included the introduction of a #20 bar in ASTM A615, available in various strengths, and ongoing studies and code updates that address the use of high-strength bars in seismic applications. The discussion covered the limitations on using these high-strength bars in structures, noting a potential shift within ACI 318 from 60 to 80 KSI for seismic systems. Recent research, including parametric studies on stress-strain behavior, supported adopting the 0.2% offset method to determine yield strength for indeterminate stress-strain curves. Additionally, studies on the behavior of high-strength concrete and reinforcement in columns highlighted benefits such as increased strength and ductility, facilitating constructions with less congestion and increased efficiency. Future code developments are anticipated based on this evolving research.

Keywords

high-strength reinforcing bars

ACI 318-14 provisions

ASTM A615

seismic applications

0.2% offset method

high-strength concrete