Analysis of Orthotropic Reinforced Concrete Structures

by Jeremy Isenberg, Sr. Staff Engr.; Agbabian-Jacobsen Assoc., Los Angeles, CA,
Samy Adham, Staff Engr.; Agbabian-Jacobsen Assoc., Los Angeles, CA,


Serial Information: Journal of the Structural Division, 1970, Vol. 96, Issue 12, Pg. 2607-2624


Document Type: Journal Paper

Discussion: Gerstle Kurt H. (See full record)
Discussion: Pandit Ganpat S. (See full record)
Discussion: Munkeby Einar (See full record)

Abstract: A mathematical model is derived for stress-strain properties of reinforced concrete. The model is obtained form stress-strain relations of reinforcing steel and plain concrete, and from considering slip in bond between them. The stress-strain relations for plain concrete are based on experimental data obtained under uniaxial, biaxial and triaxial compressive stress, and biaxial tensile and compressive stress. The model stress-strain relation in each principal stress direction is affected by the other two prinicpal stresses. The form of the stress-strain relation and the manner in which it is affected by the lateral principal stresses is different in tension and compressoin. A bilinear tensile-stress-strain relation is used to represent the elastic-plastic properties of the reinforcing steel. Until cracking occurs, properties of the model depend entirely on the concrete. After cracking, a composite modulus is used which reflects the combined stiffness of steel and concrete and takes into account the extent to which bond between steel and concrete is broken.

Subject Headings: Stress strain relations | Reinforced concrete | Compression | Mathematical models | Reinforcing steel | Bonding

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