Circular Column Base Plate Design Example

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Circular column base plate design example.

Example 4 5 on page 34. 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. M u t b x a 5 6 kn m effective plate width. Problem statement it is required to specify the appropriate thickness of a base plate to support a uc 203 x 203 x 60 subjected to.

Base plate required thickness. 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. Fy for the plate and. Extra plates connecting the anchor rods.

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. Moment to column web. To calculate c i use the formula for m since the formula for n does not apply. Base plates can also be polygonal or circular to accommodate a larger number of bolts.

Base plate and anchor rod design 2nd edition. An historical perspective including the aisc approach to base plate design for building columns. Aisc design guide 1. The dimension between the anchor bolt and the bending plane is the moment arm to be used in solving for the base plate thickness.

Of the column base plate connection in the elastic and plastic ranges and for seismic loading possibly even the cyclic force deformation relations. Example 1 1 design a base plate for an axial load of 60 kips and a moment of 480 in kips. 2 plate that represents a steel structure 2 plate is mainly used as a connection piece or as a floor plate. Column section type.

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. The bolts are cast into the concrete base in location tubes or cones and are fitted with anchor plates to prevent pull out. 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.

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. T p2. Circular base plate 1 part that represents a flat structure 1 in some contexts for example in analysis the term plate object may be used to refer to plates. The ratio of the concrete to base plate area a2 a1 is 4 0.