ACI ITG-4.3R
Report on Structural Design and Detailing for High-Strength Concrete in Moderate to High Seismic Applications
سال
: 2007-09-01
چکیده: This document addresses the material and design considerations
when using normalweight concretes having specified compressive
strengths of 6000 psi (41 MPa) or greater in structures designed
for moderate to high seismic applications. Irrespective of seismic
zone, SPC, or SDC, this document is also applicable to normalweight
high-strength concrete in intermediate or special moment frames and
intermediate or special structural walls as defined in ACI 318-05
(ACI Committee 318 2005).
The term "high-strength concrete," as defined by ACI 363R-92
(ACI Committee 363 1992), refers to concrete having a specified
compressive strength for design of 6000 psi (41 MPa) or greater.
The 6000 psi (41 MPa) threshold that was chosen for this document
is similar to that adopted by ACI Committee 363.
Even though high-strength concrete is defined based on a
threshold compressive strength, the concept of high strength is
relative. The limit at which concrete is considered to be high
strength depends largely on the location in which it is being used.
In some regions, structures are routinely designed with concrete
having specified compressive strengths of 12,000 psi (83 MPa) or
higher, whereas in other regions, concrete with a much lower
specified compressive strength is considered high strength.
Essentially, the strength threshold at which concrete is considered
high strength depends on regional factors, such as the
characteristics and availability of raw materials, production
capabilities, testing capabilities, and experience of the ready
mixed concrete supplier.
ITG-4 produced three documents: ITG-4.1 is a reference
specification that can be cited in the project specifications;
ITG-4.2R addresses materials and quality considerations that are
the basis for the ITG-4.1 specification; and ITG-4.3R, this
document, addresses structural design and detailing. Certain
modifications of ACI 318 requirements are proposed in Chapter 10 of
ITG-4.3R.
From a materials perspective, there are few differences between
the properties of high-strength concrete used in seismic
applications and those of high-strength concrete used in nonseismic
applications; therefore, the information presented in ITG-4.1 and
ITG-4.2R is generally applicable to all high-strength concrete.
When special considerations are warranted due to seismic
applications, they are addressed specifically. Unlike ITG-4.1 and
ITG-4.2R, most of the material contained in ITG-4.3R is specific to
seismic applications of high-strength concrete structural
members.
The information in Chapters 4 through 9 of this document is
presented in a report format. Chapter 10 contains suggested
modifications to design and detailing requirements in ACI
318-05.
Some topics, such as compressive stress block and confinement of
beam-columns, are more developed than others because there is
significantly more literature available on these topics. For all
topics, an attempt was made to be as thorough as possible in
summarizing the most relevant information pertaining to the design
of members with high-strength concrete. For topics with limited
information in the literature, however, recommendations were made
with the intent of preventing potentially unsafe design.
Keyword(s): bond, confinement, drift, flexure, high-strength concrete, highyield-strength reinforcement, seismic application, shear, stress block, strutand-tie
_x000D_ _x000D_
کالکشن
:
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آمار بازدید
ACI ITG-4.3R
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date accessioned | 2020-05-27T08:34:55Z | |
date available | 2020-05-27T08:34:55Z | |
date issued | 2007-09-01 | |
identifier uri | http://libsearch.um.ac.ir:80/fum/handle/fum/3225715 | |
description abstract | This document addresses the material and design considerations
when using normalweight concretes having specified compressive
strengths of 6000 psi (41 MPa) or greater in structures designed
for moderate to high seismic applications. Irrespective of seismic
zone, SPC, or SDC, this document is also applicable to normalweight
high-strength concrete in intermediate or special moment frames and
intermediate or special structural walls as defined in ACI 318-05
(ACI Committee 318 2005).
The term "high-strength concrete," as defined by ACI 363R-92
(ACI Committee 363 1992), refers to concrete having a specified
compressive strength for design of 6000 psi (41 MPa) or greater.
The 6000 psi (41 MPa) threshold that was chosen for this document
is similar to that adopted by ACI Committee 363.
Even though high-strength concrete is defined based on a
threshold compressive strength, the concept of high strength is
relative. The limit at which concrete is considered to be high
strength depends largely on the location in which it is being used.
In some regions, structures are routinely designed with concrete
having specified compressive strengths of 12,000 psi (83 MPa) or
higher, whereas in other regions, concrete with a much lower
specified compressive strength is considered high strength.
Essentially, the strength threshold at which concrete is considered
high strength depends on regional factors, such as the
characteristics and availability of raw materials, production
capabilities, testing capabilities, and experience of the ready
mixed concrete supplier.
ITG-4 produced three documents: ITG-4.1 is a reference
specification that can be cited in the project specifications;
ITG-4.2R addresses materials and quality considerations that are
the basis for the ITG-4.1 specification; and ITG-4.3R, this
document, addresses structural design and detailing. Certain
modifications of ACI 318 requirements are proposed in Chapter 10 of
ITG-4.3R.
From a materials perspective, there are few differences between
the properties of high-strength concrete used in seismic
applications and those of high-strength concrete used in nonseismic
applications; therefore, the information presented in ITG-4.1 and
ITG-4.2R is generally applicable to all high-strength concrete.
When special considerations are warranted due to seismic
applications, they are addressed specifically. Unlike ITG-4.1 and
ITG-4.2R, most of the material contained in ITG-4.3R is specific to
seismic applications of high-strength concrete structural
members.
The information in Chapters 4 through 9 of this document is
presented in a report format. Chapter 10 contains suggested
modifications to design and detailing requirements in ACI
318-05.
Some topics, such as compressive stress block and confinement of
beam-columns, are more developed than others because there is
significantly more literature available on these topics. For all
topics, an attempt was made to be as thorough as possible in
summarizing the most relevant information pertaining to the design
of members with high-strength concrete. For topics with limited
information in the literature, however, recommendations were made
with the intent of preventing potentially unsafe design. Keyword(s): bond, confinement, drift, flexure, high-strength concrete, highyield-strength reinforcement, seismic application, shear, stress block, strutand-tie _x000D_ _x000D_ | |
language | English | |
title | ACI ITG-4.3R | num |
title | Report on Structural Design and Detailing for High-Strength Concrete in Moderate to High Seismic Applications | |
type | Standard | |
contenttype | Fulltext | |
pages | 66 | |
organisation abbrivate | ACI | |
standard organization | ACI - American Concrete Institute |