The strength of plain, reinforced and prestressed concrete under the action of combined stresses, with particular reference to the combined bending and torsion of rectangular sections

Abstract

Summary A theory for the strength of concrete and reinforced concrete under the action of combined stresses is advanced, which combines Rankine's maximum principal stress criterion and Coulomb's internal friction criterion. Equations for the strength of plain, reinforced and prestressed concrete in combined bending and torsion are then derived. The distinct difference between primary bending and primary torsion fracture is explained by the dual character of the criterion of failure. It also accounts for the increase in the torsional strength of a reinforced concrete section resulting from the addition of bending. Prestressing delays the formation of tension cracks until the compression due to the initial prestress has been offset, and it therefore effects a very great improvement in the torsional strength of concrete.

A Procedure for the Analysis Amd Design of Concrete Armor Units

“…This led to the development of an interaction equation, based on the concrete failure theory of Cowan (1953Cowan ( , 1955, relating failure in the dolos shank composed of plain concrete under the combined actions of bending and tension:…”

Morphology of the Paste-Aggregate Interface, Volume 1

“…Early in the history of construction, various engineers sought to derive theories which would allow the prediction of failure loads. These theories, usually based on the theory of elasticity and having some empirical components, are generally known as classical failure theories (26). In general they are phenomenological in nature.…”

Data Sensing and Processing Tensioning System Based on the Internet of Things

“…Prestressed concrete beams are widely used in highway and railway construction [1], and their production process consists of four steps, namely, template installation, reinforcement assembling, concrete pouring, and prestress tensioning. Prestress tensioning is an important measure to improve the tensile strength of concrete [2][3][4][5][6], and its results directly affect the performance and quality of bridges [7,8]. The development of numerical control technology and smart devices has made intelligent tensioning a mainstream technology.…”