New model for practical prediction of creep and shrinkage

Zdenek P. Bazant; Liisa Panula

New model for practical prediction of creep and shrinkage

Zdenek P. Bazant, Liisa Panula

Civil and Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

11 Scopus citations

Abstract

A new model for the prediction of creep and shrinkage (which is presented in full detail elsewhere), along with a large scope verification by test data, is outlined in simple terms, explained and illustrated in this paper. In this model, the total creep strain is separated into the basic and drying creep components, but not into "reversible" and "irreversible" creep components. The effect of environmental relative humidity is modeled by vertical scaling of the drying creep term. The effect of specimen size is modeled by a horizontal shift of the drying creep term in the logarithmic time scale, and the basic creep term is unaffected by humidity and specimen size. The effects of humidity and size upon the drying creep are modeled completely analogously to those on shrinkage. The dependence of shrinkage as well as drying creep on the size of the cross section is introduced by means of shrinkagesquare halftime, which is the same for both shrinkage and drying creep. Finally, the basic creep component of total creep strain is characterized by double power law..

Original language	English (US)
Title of host publication	Designing for Creep and Shrinkage in Concrete Structures
Publisher	American Concrete Institute
Pages	7-23
Number of pages	17
ISBN (Electronic)	9780870317071
State	Published - Oct 1 1982
Event	1978 Adrian Pauw Symposium on Designing for Creep and Shrinkage at the 1978 ACI Fall Convention - Houston, United States Duration: Oct 29 1978 → Nov 3 1978

Publication series

Name	American Concrete Institute, ACI Special Publication
Volume	SP-076
ISSN (Print)	0193-2527

Conference

Conference	1978 Adrian Pauw Symposium on Designing for Creep and Shrinkage at the 1978 ACI Fall Convention
Country/Territory	United States
City	Houston
Period	10/29/78 → 11/3/78

Funding

Support by the u.s. National Science Foundation under Grant No. ENG75-14848-A01 to Northwestern University is gratefully acknowledged.

Keywords

Building codes
Concretes
Creep properties
Deformation
Humidity
Mathematical models
Shririkage
Stra1ns
Structural analysis
Structural design
Volume change

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

Cite this

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title = "New model for practical prediction of creep and shrinkage",

abstract = "A new model for the prediction of creep and shrinkage (which is presented in full detail elsewhere), along with a large scope verification by test data, is outlined in simple terms, explained and illustrated in this paper. In this model, the total creep strain is separated into the basic and drying creep components, but not into {"}reversible{"} and {"}irreversible{"} creep components. The effect of environmental relative humidity is modeled by vertical scaling of the drying creep term. The effect of specimen size is modeled by a horizontal shift of the drying creep term in the logarithmic time scale, and the basic creep term is unaffected by humidity and specimen size. The effects of humidity and size upon the drying creep are modeled completely analogously to those on shrinkage. The dependence of shrinkage as well as drying creep on the size of the cross section is introduced by means of shrinkagesquare halftime, which is the same for both shrinkage and drying creep. Finally, the basic creep component of total creep strain is characterized by double power law..",

keywords = "Building codes, Concretes, Creep properties, Deformation, Humidity, Mathematical models, Shririkage, Stra1ns, Structural analysis, Structural design, Volume change",

author = "Bazant, {Zdenek P.} and Liisa Panula",

note = "Funding Information: Support by the u.s. National Science Foundation under Grant No. ENG75-14848-A01 to Northwestern University is gratefully acknowledged. Publisher Copyright: {\textcopyright} 1982 American Concrete Institute. All rights reserved.; 1978 Adrian Pauw Symposium on Designing for Creep and Shrinkage at the 1978 ACI Fall Convention ; Conference date: 29-10-1978 Through 03-11-1978",

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Bazant, ZP & Panula, L 1982, New model for practical prediction of creep and shrinkage. in Designing for Creep and Shrinkage in Concrete Structures. American Concrete Institute, ACI Special Publication, vol. SP-076, American Concrete Institute, pp. 7-23, 1978 Adrian Pauw Symposium on Designing for Creep and Shrinkage at the 1978 ACI Fall Convention, Houston, United States, 10/29/78.

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AU - Panula, Liisa

N1 - Funding Information: Support by the u.s. National Science Foundation under Grant No. ENG75-14848-A01 to Northwestern University is gratefully acknowledged. Publisher Copyright: © 1982 American Concrete Institute. All rights reserved.

PY - 1982/10/1

Y1 - 1982/10/1

N2 - A new model for the prediction of creep and shrinkage (which is presented in full detail elsewhere), along with a large scope verification by test data, is outlined in simple terms, explained and illustrated in this paper. In this model, the total creep strain is separated into the basic and drying creep components, but not into "reversible" and "irreversible" creep components. The effect of environmental relative humidity is modeled by vertical scaling of the drying creep term. The effect of specimen size is modeled by a horizontal shift of the drying creep term in the logarithmic time scale, and the basic creep term is unaffected by humidity and specimen size. The effects of humidity and size upon the drying creep are modeled completely analogously to those on shrinkage. The dependence of shrinkage as well as drying creep on the size of the cross section is introduced by means of shrinkagesquare halftime, which is the same for both shrinkage and drying creep. Finally, the basic creep component of total creep strain is characterized by double power law..

AB - A new model for the prediction of creep and shrinkage (which is presented in full detail elsewhere), along with a large scope verification by test data, is outlined in simple terms, explained and illustrated in this paper. In this model, the total creep strain is separated into the basic and drying creep components, but not into "reversible" and "irreversible" creep components. The effect of environmental relative humidity is modeled by vertical scaling of the drying creep term. The effect of specimen size is modeled by a horizontal shift of the drying creep term in the logarithmic time scale, and the basic creep term is unaffected by humidity and specimen size. The effects of humidity and size upon the drying creep are modeled completely analogously to those on shrinkage. The dependence of shrinkage as well as drying creep on the size of the cross section is introduced by means of shrinkagesquare halftime, which is the same for both shrinkage and drying creep. Finally, the basic creep component of total creep strain is characterized by double power law..

KW - Building codes

KW - Concretes

KW - Creep properties

KW - Deformation

KW - Humidity

KW - Mathematical models

KW - Shririkage

KW - Stra1ns

KW - Structural analysis

KW - Structural design

KW - Volume change

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EP - 23

BT - Designing for Creep and Shrinkage in Concrete Structures

PB - American Concrete Institute

T2 - 1978 Adrian Pauw Symposium on Designing for Creep and Shrinkage at the 1978 ACI Fall Convention

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ER -

New model for practical prediction of creep and shrinkage

Abstract

Publication series

Conference

Funding

Keywords

ASJC Scopus subject areas

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