ACI-445.1R-12 Report on Torsion in Structural Concrete

$109.50 $98.55

ACI-445.1R-12 Report on Torsion in Structural Concrete offers a clear understanding that the effects of torsion on concrete members is essential to the safe, economical design of reinforced and prestressed concrete members. This report begins with a brief and systematic summary of the 180-year history of torsion of structural concrete members, new and updated theories and their applications, and a historical overview outlining the development of research on torsion of structural concrete members. Historical theories and truss models include classical theories of Navier, Saint-Venant, and Bredt; the three-dimensional (3-D) space truss of Rausch; the equilibrium (plasticity) truss model of Nielson as well as Lampert and Thürlimann; the compression field theory (CFT) by Collins and Mitchell; and the softened truss model (STM) by Hsu and Mo.

This report emphasizes that it is essential to the analysis of torsion in reinforced concrete that members should: 1) satisfy the equilibrium condition (Mohr’s stress circle); 2) obey the compatibility condition (Mohr’s strain circle); and 3) establish the constitutive relationships of materials such as the “softened” stress-strain relationship of concrete and “smeared” stress-strain relationship of steel bars. The behavior of members subjected to torsion combined with bending moment, axial load, and shear is discussed. This report deals with design issues, including compatibility torsion, spandrel beams, torsional limit design, open sections, and size effects.

OVERVIEW

1—INTRODUCTION AND SCOPE

2—NOTATION AND DEFINITIONS

3—HISTORICAL OVERVIEW OF TORSION THEORIES AND THEORETICAL MODELS

4—BEHAVIOR OF MEMBERS SUBJECTED TO PURE TORSION

5—ANALYTICAL MODELS FOR PURE TORSION

6—MEMBERS SUBJECTED TO TORSION COMBINED WITH OTHER ACTIONS

7—ADDITIONAL DESIGN ISSUES RELATED TO TORSION

8—DETAILING FOR TORSIONAL MEMBERS

9—DESIGN EXAMPLES

 10—REFERENCES


DETAILS

Author: Joint ACI-ASCE Committee 445

Publication Year: 2013

Pages: 92

ISBN: 9780870318108

Categories: Torsion

Formats: Printed Document, PDF


LINKS

Specifications for Structural Concrete

Building Code Requirements for Structural Concrete, 2014

Metric Building Code Requirements for Structural Concrete, 2011

Metric Building Code Requirements for Structural Concrete, 2014

Metric Building Code Requirements for Structural Concrete, Spanish, 2011

Building Code Requirements for Structural Concrete, Spanish, Inch-Pound, CD 2011

Residential Code Requirements for Structural Concrete, 2014

Metric Residential Code Requirements for Structural Concrete, 2010

Design and Construction of Structural Concrete Reinforced, 2015

Shear Design of Structural Concrete, R2009

Structural Concrete Behavior, Implementation

Structural Concrete in Performance-Based Seismic Design of Bridges CD