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 ?
6] studied the dynamic behavior composite beam subjected to vertical moving force using the commercial finite element.
Our goal for the conference presentation is to use our woven modeling in the pole side impact of a composite beam (Figure 8).
Theodore Zoli-winner in 2012 for solving urgent bridge dilemmas around the world -John Hillman-winner in 2010 for creating a next-generation composite beam -Michael Burton-winner in 2002 for leading the cleanup of Ground Zero -Charles Thornton-winner in 2001 for creating the successful ACE mentor program -Ginger Evans-winner in 1994 for managing the construction of Denver's airport
A new composite beam consisting of a hybrid carbon fiber-reinforced polymer (CFRP) and glass fiber-reinforced polymer (GFRP) I-beam--combined with a precast ultra-high performance fiber-reinforced concrete (UHPFRC) stab--provides the advantage of high corrosion resistance in the beam, with high strength and durability in the slab.
The Camp students attended classes and laboratory sessions led by Drexel University faculty and graduate students and used the principles they learned to compete in a team competition to design and build a composite beam.
A hybrid composite beam is made up of a compression arch consisting of 6,000 pounds per square inch, psi (41,370 kilopascals, kPa) of self-consolidating concrete that is pumped into an internal arch-shaped conduit.
Some specific topics include vibration attenuation in an epoxy smart composite beam with embedded NiTi, and stress recovery of constrained NiTi SMA wire for aerospace applications.
Compared with a concrete beam, which requires 28 days just for curing, the composite beam was ready for shipping in 15 days.
Partial interaction between elastically connected elements of a composite beam, International Journal of Solids and Structures 4: 1125-1135.