ground beam

Ground beams, commonly known as ground ring beams, have a closed characteristic when enclosed and form a crack limiting system with structural columns to mitigate the negative effects of uneven settlement. Different from the foundation beam, the foundation beam mainly plays a connecting role, enhances the stiffness of the horizontal plane, and sometimes also serves as a supporting beam for the bottom filling wall, without considering its function.

Among the existing calculation methods for foundation beams, the following two are more representative:

(1) For the foundation beam under the wall, the existing view is that the wall above the platform beam can be regarded as a semi planar elastic body, and the foundation beam and the wall (semi elastic body) deform together. The foundation beam is regarded as an inverted elastic foundation beam under the action of pile top load. The reaction force of the foundation beam is solved according to elastic theory, simplified as the load acting on the foundation beam, and then the internal force is calculated according to ordinary continuous beams.

(2) For the strip foundation beam under the column, the existing view is that it can be considered as an elastic foundation beam calculation, that is, the pile top reaction force acts as a concentrated force on the beam, the column is the support of the beam, and its internal forces are analyzed according to ordinary continuous beams. The pile top reaction force is determined by calculating the elastic foundation frame.

For the two different cases of foundation beams mentioned above, the existing viewpoint has considered them as elastic foundation beams in the calculation process. However, the foundation beam under the wall is considered as an inverted elastic foundation beam, while the foundation beam under the column is considered as an elastic foundation beam. However, it should be pointed out that the above treatment methods of existing viewpoints do not conform to the definition of elastic foundation beams.