Elastic foundation beam refers to a beam resting on a foundation with certain elasticity. Such as strip foundation, sleepers under the rails, etc.

Because all points of the beam are supported on elastic foundation, the deformation, stiffness and internal force of the beam can be reduced.

Advantages of elastic foundation beam and ordinary beam

1. The statically indeterminate times of ordinary beams are limited, while the elastic foundation beam is in continuous contact with the foundation and has numerous supports, so the elastic foundation beam has countless statically indeterminate times.

2. The bearing of ordinary beam is usually regarded as rigid bearing, that is, the deformation of foundation is ignored and only the deformation of beam is considered. Elastic foundation beam must consider the deformation of foundation at the same time. In fact, the beam and the foundation are deformed together.