Steel Column Base Plate Design Moment

The design forces for each situation are therefore determined first.

Steel column base plate design moment.

Column bases for instance moment frames which resist wind or earthquake forces. Two general approaches exist for design one based on the elastic behavior and one based on the ultimate. 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. 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.

This results in base plate details that are expensive difficult to. Engineers must refer to textbooks for design information though not all texts cover this case. It is designed to support gravity loads bending moments and shear forces. The column base connection is one of the critical connections in a steel structure.

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. Base plates with both axial loads and moments are not covered in the aisc specification or the manual of steel construction. 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.