Role of Expansion on Mechanical Behavior of Concrete

The collective experimental evidence from standard uniaxial, biaxial, and triaxial tests of plain concrete is examined to identify the essential governing state variables for the benefit of three-dimensional constitutive modeling of the material. It is shown that the volumetric expansion that develops in mechanically loaded concrete due to progressive microcracking is an important measure of the extent of damage in the material microstructure, and can be used to consistently estimate the changes effected on the resistance of concrete as damage accumulates. Within this framework, the degree of restraint against expansion, such as is provided by arbitrary boundary conditions, can be used to completely determine the residual strength and deformability of concrete under these conditions. These concepts provide the tools for the development of a simple but general constitutive model for concrete and offer an opportunity for unification of the existing interpretations of various aspects of the observed mechanic...

[1]  L. Cedolin,et al.  Triaxial Stress-Strain Relationship for Concrete , 1977 .

[2]  Kurt H. Gerstle,et al.  Behavior of Concrete Under Biaxial Stresses , 1969 .

[3]  Wai-Fah Chen.  Plasticity in reinforced concrete , 1982 .

[4]  M. Kotsovos,et al.  Generalized Stress-Strain Relations for Concrete , 1978 .

[5]  J. G. Macgregor,et al.  Structural Design Considerations for High-Strength Concrete , 1993 .

[6]  F. E. Richart,et al.  Failure of plain and spirally reinforced concrete in compression , 1929 .

[7]  E. Thorenfeldt.  Mechanical properties of high-strength concrete and applications in design , 1987 .

[8]  Eivind Hognestad,et al.  A STUDY OF COMBINED BENDING AND AXIAL LOAD IN REINFORCED CONCRETE MEMBERS; A REPORT OF AN INVESTIGATION CONDUCTED BY THE ENGINEERING EXPERIMENT STATION, UNIVERSITY OF ILLINOIS, UNDER AUSPICES OF THE ENGINEERING FOUNDATION, THROUGH THE REINFORCED CONCRETE RESEARCH COUNCIL. , 1951 .

[9]  Frank J. Vecchio,et al.  Finite Element Modeling of Concrete Expansion and Confinement , 1992 .

[10]  F. Vecchio,et al.  THE MODIFIED COMPRESSION FIELD THEORY FOR REINFORCED CONCRETE ELEMENTS SUBJECTED TO SHEAR , 1986 .

[11]  R. M. Zimmerman,et al.  Behavior of concrete under multiaxial stress states , 1980 .

[12]  Stavroula J. Pantazopoulou,et al.  MICROSTRUCTURAL ASPECTS OF THE MECHANICAL RESPONSE OF PLAIN CONCRETE , 1995 .

[13]  Patrick Paultre,et al.  High‐Strength Concrete Columns Confined by Rectangular Ties , 1994 .

[14]  Shamim A. Sheikh,et al.  STRENGTH AND DUCTILITY OF TIED CONCRETE COLUMNS , 1980 .

[15]  F. Vecchio.  The Response of Reinforced Concrete to In-Plane Shear and Normal Stresses , 1982 .