Stability of Frames with Grade Beam and Soil Interaction

The effect of a grade beam and soil interaction on framing stability strength is presented, The influence of foundation depth embedded below ground level is also investigated in this study. The finite element method and elastic spring model are applied to carry out the stability analyses. The results of the closed‐form solution from the classical differential equation are used for the purposes of comparison. It has been verified from this study that the soil interaction has a great impact on the buckling strength of framing systems. Providing a grade beam between column bases will normally increase the strength of framing stability. Increasing the embedded depth of column footing improves the rigidity of column base, which will in turn improve the buckling strength of frame. Framing systems have lower buckling strength if the effect of soil interaction is taken into account. Thus, the effect of soil‐structural interaction must be considered in stability analyses.