Steel Column Base Plate Design Moment

The design forces for each situation are therefore determined first.

Steel column base plate design moment.

An example of a column base which is able to transmit moment and axial force between steel members and concrete substructures at the base of columns is shown in the figure on the left. Engineers must refer to textbooks for design information though not all texts cover this case. The couple of forces of bearing on the concrete and tension in anchor bolts resists to the external bending moment resulted by fixing the column base in foundation. The example shows a column base with an unstiffened base plate.

Whether each t stub is in tension or compression depends on the magnitudes of the axial force and bending moment. Stiffened base plate connections and column bases cast in pockets are other options available. Two general approaches exist for design one based on the elastic behavior and one based on the ultimate. Base plates with both axial loads and moments are not covered in the aisc specification or the manual of steel construction.

It is designed to support gravity loads bending moments and shear forces. Distribution of forces at the column base the design moment resistance of the base plate depends on the resistances of two t stubs one for each flange of the column. Steel column base plates are one of the most ndamental parts of a steel structure yet the design of base plates is commonly not given the attention that it should by engineers.