Time-Dependent Behaviour of Concrete Structures

By Raymond Ian Gilbert, Gianluca Ranzi

© 2011 – CRC Press

428 pages

Purchasing Options:
Hardback: 9780415493840
pub: 2010-09-15
US Dollars$164.95

About the Book

Serviceability failures of concrete structures involving excessive cracking or deflection are relatively common, even in structures that comply with code requirements. This is often as a result of a failure to adequately account for the time-dependent deformations of concrete in the design of the structure. The serviceability provisions embodied in codes of practice are relatively crude and, in some situations, unreliable and do not adequately model the in-service behaviour of structures. In particular, they fail to adequately account for the effects of creep and shrinkage of the concrete. Design for serviceability is complicated by the non-linear and inelastic behaviour of concrete at service loads.

Providing detailed information, this book helps engineers to rationally predict the time-varying deformation of concrete structures under typical in-service conditions. It gives analytical methods to help anticipate time-dependent cracking, the gradual change in tension stiffening with time, creep induced deformations and the load independent strains caused by shrinkage and temperature changes. The calculation procedures are illustrated with many worked examples.

A vital guide for practising engineers and advanced students of structural engineering on the design of concrete structures for serviceability and provides a penetrating insight into the time-dependent behaviour of reinforced and prestressed concrete structures.

Table of Contents

Time-Dependent Deformation


Creep of Concrete

Shrinkage of Concrete

Time-Analysis – The Basic Problem

Material Properties


Steep Reinforcement


Design for Serviceability – Deflection and Crack Control


Design Objectives and Criteria

Design Actions

Design Criteria for Servicability

Maximum Span-to-Depth Ration Minimum Thickness

Deflection Control by Simplified Calculation

Crack Control


Uncracked Sections – Axial Loading


The Effective Modulus Method

The Principle of Superposition – Step-by-Step Method

The Age-Adjusted Effect Modulus Method (AEMM)

The Rate of Creep Method (RCM)

Comparison of Methods of Analysis

Uncracked Sections – Axial Force and Uniaxial Bending

Uncracked Sections – Axial Force and Biaxial Bending

Introductory Remarks

Overview of Cross-Sectional Analysis

Short-Term Analysis of Reinforced or Prestressed Concrete Cross Sections

Long-Term Analysis of Reinforced or Prestressed Concrete Cross Sections Using the Age Adjusted Effective Modulus

Long-Term Analysis of Reinforced Prestressed Concrete Cross Section Using the Step-by-Step Procedure

Composite Steel-Concrete Cross Sections


Cracked Sections

Introductory Remarks

Short-Term Analysis

Time-Dependent Analysis (AEMM)

Short- and Long-Term Analysis Using the Step-by-Step Method


Members and Structures

Introductory Remarks

Deflection of Statically Determinate Beams

Statically Indeterminate Beams and Slabs

Two-Way Slab Systems

Slender Reinforced Concrete Columns

Temperature Effects

Concluding Remarks


Stiffness Method and Finite Element Modelling


Overview of the Stiffness Method

Member Loads

Time Analysis Using AEMM

Time Analysis Using SSM

Time Analysis Using the Finite Element Method

Analysis of Cracked Members


Appendix: Analytical Formulations – Euler-Bernoulli Beam Model

About the Authors

Raymond Ian Gilbert is Professor of Civil Engineering at the University of New South Wales and currently holds an Australian Research Council Australian Professorial Fellowships. He has over 35 years experience in structural design and is a specialist in the analysis and design of reinforced and prestressed concrete structures.

Gianluca Ranzi is a Senior Lecturer of structural engineering at the University of Sydney, specialising in the analysis and design of concrete and composite steel-concrete structures.

Subject Categories

BISAC Subject Codes/Headings:
TECHNOLOGY & ENGINEERING / Construction / General