Lecture

Reinforced Concrete Beams: Testing and Pre-Dimensioning

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In course

CIVIL-123: Structures II

Le cours permet de comprendre le fonctionnement, déterminer les efforts et de dimensionner les structures en treillis, en poutre, en dalle et en cadre. Le cours se base sur la résolution des efforts par la statique graphique. ...

Description

This lecture covers the testing of reinforced concrete beams, including measurements during the test, modeling with an applet, and pre-dimensioning techniques. It discusses the strength, supports, and materials used in beam testing, as well as the glossary of terms related to beam analysis.

Instructor

Olivier Burdet

Born 1960, Olivier Burdet has received his Diploma in Civil Engineering from EPFL in 1983. After a couple years in engineering practice, he went back to studying at the university of Texas at Austin, where he received his PhD in 1990. Returning to EPFL in 1990, he is now a senior researcher and a lecturer in the field of reinforced concrete structures. He is also actively involved in the development of internet-based course contents and MOOCs.

Official source

Related concepts (28)

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Compressive strength

In mechanics, compressive strength (or compression strength) is the capacity of a material or structure to withstand loads tending to reduce size (as opposed to tensile strength which withstands loads tending to elongate). In other words, compressive strength resists compression (being pushed together), whereas tensile strength resists tension (being pulled apart). In the study of strength of materials, tensile strength, compressive strength, and shear strength can be analyzed independently.

Types of concrete

Concrete is produced in a variety of compositions, finishes and performance characteristics to meet a wide range of needs. Modern concrete mix designs can be complex. The choice of a concrete mix depends on the need of the project both in terms of strength and appearance and in relation to local legislation and building codes. The design begins by determining the requirements of the concrete. These requirements take into consideration the weather conditions that the concrete will be exposed to in service, and the required design strength.

Strength of materials

The field of strength of materials (also called mechanics of materials) typically refers to various methods of calculating the stresses and strains in structural members, such as beams, columns, and shafts. The methods employed to predict the response of a structure under loading and its susceptibility to various failure modes takes into account the properties of the materials such as its yield strength, ultimate strength, Young's modulus, and Poisson's ratio.

Concrete

Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that is easily poured and molded into shape.

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