ACI PRC-445-99: Recent Approaches to Shear Design of Structural Concrete (Reapproved 2015)

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Truss model approaches and related theories for the design of reinforced concrete members to resist shear are presented. Realistic models for the design of deep beams, corbels, and other nonstandard structural members are illustrated. The background theories and the complementary nature of a number of different approaches for the shear design of structural concrete are discussed. These relatively new procedures provide a unified, intelligible, and safe design framework for proportioning structural concrete under combined load effects.

Keywords: beams (supports); concrete; design; detailing; failure; models; shear strength; structural concrete; strut and tie.


Document Details

Author: ACI Committee 445

Publication Year: 2002

Pages: 55

ISBN: 9780870314674

Categories: Shear

Formats: PDF

Table of Contents

Chapter 1--Introduction

1.1--Scope and Objectives

1.2--Historical developmet of shear design provisions

1.3--Overview of current ACI design procedures


Chapter 2--Compression field theory


2.2--Compression field theory

2.3--Stress-strain relationships for diagonally cracked concrete

2.4--Modified compression field theory

2.5--Rotating-angle softened-truss model

2.6--Design procedure based on modified compression field theory

Chapter 3--Truss approaches with concrete contribution


3.2--Overview of recent European codes

3.3--Modified sectional-truss model approach

3.4--Truss models with crack fiction

3.5--Fixed-angle softened-truss models


Chapter 4--Members without transverse reinforcement


4.2--Empirical methods

4.3--Mechanisms of shear transfer

4.4--Models for members without transverse reinforcement

4.5--Important parameters influencing shear capacity


Chapter 5--Shear friction


5.2--Shear-friction hypothesis

5.3--Empirical developments

5.4--Analytical developments

5.5--Code developments

Chapter 6--Design with strut-and-tie models


6.2--Design of B regions

6.3--Design of D regions

Chatper 7--Summary


7.2--Truss models

7.3--Members without transverse reinforcement

7.4--Additional work

Appendix A--ACI 318M-95 shear design approach for beams

Appendix B--References


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