Circular Column Base Plate Design Example

The forces and deformations from the structural analyses used to design the column base plate connection are dependent on the choice of the column base plate connection details.

Circular column base plate design example.

I design base plates for circular columns using the aisc asd manual pages 3 106 to 3 110. B eff 2 x a 400 mm example 4 5 on page 35. Of the column base plate connection in the elastic and plastic ranges and for seismic loading possibly even the cyclic force deformation relations. The bolts are cast into the concrete base in location tubes or cones and are fitted with anchor plates to prevent pull out.

Fy for the plate and. Moment to column web. 2 plate that represents a steel structure 2 plate is mainly used as a connection piece or as a floor plate. Base plates can also be polygonal or circular to accommodate a larger number of bolts.

Also it seems to me that the formula for n will not apply unless the column is very large in diameter allowing the portion of the base plate inside the column to. Example 1 1 design a base plate for an axial load of 60 kips and a moment of 480 in kips. The dimension between the anchor bolt and the bending plane is the moment arm to be used in solving for the base plate thickness. Base plate required thickness.

Base plate and anchor rod design 2nd edition. To calculate c i use the formula for m since the formula for n does not apply. Example 4 5 on page 34. M u t b x a 5 6 kn m effective plate width.

An historical perspective including the aisc approach to base plate design for building columns. Extra plates connecting the anchor rods. Design of column base plates typical column bases as shown below consist of a single plate fillet welded to the end of the column and attached to the foundation with four holding down bolts. This article is aimed at providing the procedure for the design of column base plates subjected to axial and shear forces according to eurocode 3.

Find a design example below. Note the aisc design guide 1 base plate design procedure for wf columns if used for hss columns would assume a bending plane at the face of the hss column and the portion of the plate beyond the column as a cantilever. Aisc design guide 1. The ratio of the concrete to base plate area a2 a1 is 4 0.

The forces and deformations from the structural analyses used to design the column base plate connection are dependent on the choice of the column base plate connection details. Of the column base plate connection in the elastic and plastic ranges and for seismic loading possibly even the cyclic force deformation relations. T p2. Large moment base plate design triangular pressure distribution approach design the base plate shown in figure b 4 for an asd and lrfd required strength of 60 and 90 kips respectively and moments from the dead and live loads equal to 480 and 720 kip in respectively.