Title:
ITG-4.3R-07: Report on Structural Design and Detailing for High-Strength Concrete in Moderate to High Seismic Applications
Author(s):
ACI Committee 93
Publication:
Technical Documents
Volume:
Issue:
Appears on pages(s):
66
Keywords:
bond; confinement; drift; flexure; high-strength concrete; high-yield-strength reinforcement; seismic application; shear; stress block; strut-and-tie.
DOI:
Date:
8/1/2007
Abstract:
Note: ITG-4.3R-07 is Out of Print. However, a PDF version is available.
ACI ITG-4.3R presents a literature review on seismic design using high-strength concrete. The document is organized in chapters addressing the structural design of columns, beams, beam-column joints, and structural walls made with high-strength concrete, and focuses on aspects most relevant for seismic design. Each chapter concludes with a series of recommended modifications to ACI 318-05 based on the findings of the literature review.
The recommendations include proposals for the modification of the equivalent rectangular stress block, equations to calculate the axial strength of columns subjected to concentric loading, column confinement requirements, limits on the specified yield strength of confinement reinforcement, strut factors, and provisions for the development of straight bars and hooks.
An accompanying standard, ITG-4.1, is written in mandatory language in a format that can be adopted by local jurisdictions, and will allow building officials to approve the use of high-strength concrete on projects that are being constructed under the provisions of ACI 301, "Specifications for Structural Concrete," and ACI 318, "Building Code Requirements for Structural Concrete."
ITG 4 has also developed another nonmandatory language document: ITG-4.2R. It addresses materials and quality considerations and is basically the supporting document for ITG-4.1.