composite beam

composite beam

[kəm′päz·ət ′bēm]
(civil engineering)
A structural member composed of two or more dissimilar materials joined together to act as a unit in which the resulting system is stronger than the sum of its parts. An example in civil structures is the steel-concrete composite beam in which a steel wide-flange shape (I or W shape) is attached to a concrete floor slab.

Composite beam

A structural member composed of two or more dissimilar materials joined together to act as a unit. An example in civil structures is the steel-concrete composite beam in which a steel wide-flange shape (I or W shape) is attached to a concrete floor slab (see illustration). The many other kinds of composite beam include steel-wood, wood-concrete, and plastic-concrete or advanced composite materials–concrete. Composite beams as defined here are different from beams made from fiber-reinforced polymeric materials. See Composite material

Typical composite floor systemenlarge picture
Typical composite floor system

There are two main benefits of composite action in structural members. First, by rigidly joining the two parts together, the resulting system is stronger than the sum of its parts. Second, composite action can better utilize the properties of each constituent material. In steel-concrete composite beams, for example, the concrete is assumed to take most or all of the compression while the steel takes all the tension.

Steel-concrete composite beams have long been recognized as one the most economical structural systems for both multistory steel buildings and steel bridges. Buildings and bridges require a floor slab to provide a surface for occupants and vehicles, respectively. Concrete is the material of choice for the slab because its mass and stiffness can be used to reduce deflections and vibrations of the floor system and to provide the required fire protection. The supporting system underneath the slab, however, is often steel because it offers superior strength-weight and stiffness-weight ratio, ease of handling, and rapid construction cycles. Since both the steel and concrete are already present in the structures, it is logical to connect them together to better utilize their strength and stiffness. See Concrete, Concrete slab

composite beam

A structural beam composed of different materials so interconnected that the beam responds to loads as a unit.
References in periodicals archive ?
the bridge crossing structure is proposed to comprise a single span steel composite beam bridge with reinforced concrete abutments.
(2003) investigated the effect of delamination length on multi-delaminated composite beam experimentally.
Firstly, a one-dimensional spectral element model able to simulate the dynamic behavior of a composite beam will be implemented herein.
Hochard, "Monitoring a delamination in a laminated composite beam using in-situ measurements and parametric identification," Journal of Sound and Vibration, vol.
All the tested composite beam specimens reached their ultimate moment capacity with no lateral movement signs of the cross section or any other instability form.
Among the latest achievements and to increase the economy in the material, Europe through the European Commission EUR 25321 developed the preco-beam, a composite beam combining a UHPC deck and an inverted-T steel girder of which the top is worked to have puzzle, fin or clothoidal dowel shape [9].
The results found by Galvanetto and Violaris [14], in their study on a finite element model of a composite beam, showed that the developed algorithm based on proper orthogonal decomposition was capable of detecting both location and severity of damage even under variable loading condition with a high level of confidence.
Delamination damage was introduced by applying mold release at the midplane in a composite beam of configuration [0]20.
Conrad, "Vibration characteristics of a composite beam containing an electrorheological fluid," Journal of Intelligent Material Systems and Structures, vol.
Let [OMEGA] be the simply or multiply connected cross section of an orthotropic and linearly elastic Saint-Venant composite beam under torsion.
[9] investigated a calculation method for the prediction of the shear resistance of precast composite beam; both experimental and numerical results were used to validate the developed analytical expressions.