Base Plate
SI 3212 Set 8B - Sem 2, 2024/2025 1
Column Base Plate
⚫ Umumnya:
⚫ Dilas pada kaki kolom lantai terbawah sebagai tumpuan kolom
⚫ Berukuran lebih besar dari dimensi kolom
⚫ Menyalurkan gaya dari kolom ke pondasi/tumpuan dari beton
⚫ Mencegah kerusakan pada beton
⚫ Memberikan tumpuan sementara pada waktu konstruksi
⚫ Referensi:
⚫ McCormac, 5th ed, Ch. 7.7 and Appendix D
⚫ Aghayere, 3rd ed, Ch. 8.15-8.18
⚫ Salmon & Johnson, 5th ed, Ch. 13.9
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Column Base Plate
⚫ Column base
plate, bearing
stresses, and
critical areas
Ref: A. Aghayere and J. Vigil.
Structural Steel Design, 3rd Ed.
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Leveling of Column
Ref: A. Aghayere and J. Vigil.
Structural Steel Design, 3rd Ed.
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Base Plate Materials
Ref: A. Aghayere and J. Vigil.
Structural Steel Design, 3rd Ed.
SI 3212 Set 8B - Sem 2, 2024/2025 5
Base Plate Design
⚫ Plate Thickness
⚫ Critical length = max of m, n, and λn’
WF HSS
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Anchor Rods
⚫ Berfungsi sebagai angkur pada dasar kolom
⚫ Mencegah guling pada saat erection
⚫ Memberikan tahanan momen dan gaya tarik yang dapat terjadi di
dasar kolom
⚫ Baut mutu tinggi (A325 dan A490) umumnya tidak digunakan
sebagai baut angkur
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Uplift Force at
Column Base
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⚫ Plate thickness
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⚫ Plate thickness
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Tension Capacity of Anchor Rods
Embedded in Concrete
⚫ Minimum of:
1.
2.
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Lateral Load Resistance at Column Base
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Lateral Load Resistance at Column Base
⚫ Details for resisting shear at column base plates
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Column Base Plates under
Axial Load and Moment
Ref: A. Aghayere and J. Vigil.
Structural Steel Design, 3rd Ed. SI 3212 Set 8B - Sem 2, 2024/2025 14
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⚫ Design procedure is given in pp 556-559.
Ref: A. Aghayere and J. Vigil.
Structural Steel Design, 3rd Ed. SI 3212 Set 8B - Sem 2, 2024/2025 15
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⚫ Design procedure is given in pp. 559-562
Ref: A. Aghayere and J. Vigil.
Structural Steel Design, 3rd Ed. SI 3212 Set 8B - Sem 2, 2024/2025 16
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Column Base with Stiffeners
⚫ Reducing plate tickness
Ref: A. Aghayere and J. Vigil.
Structural Steel Design, 3rd Ed. SI 3212 Set 8B - Sem 2, 2024/2025 17
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Base Plate
Ref: A. Aghayere and J. Vigil.
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Base Plate
Ref: A. Aghayere and J. Vigil.
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Base Plate
Ref: A. Aghayere and J. Vigil.
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Base Plate
Ref: A. Aghayere and J. Vigil.
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Base Plate
Ref: A. Aghayere and J. Vigil.
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Ref: A. Aghayere and J. Vigil.
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Ref: A. Aghayere and J. Vigil.
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Ref: A. Aghayere and J. Vigil.
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Ref: A. Aghayere and J. Vigil.
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Ref: A. Aghayere and J. Vigil.
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Ref: A. Aghayere and J. Vigil.
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Ref: A. Aghayere and J. Vigil.
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Ref: A. Aghayere and J. Vigil.
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Moment Resisting Column Base Plates
⚫ Column base plate is designed for an axial load and a
relatively small bending moment such that the resultant
load falls between the column flanges
⚫ The width and length of the plate are assumed, after
which the pressures underneath the plate are calculated
and compared with the permissible value
⚫ If the pressures are unsatisfactory, the dimensions are
changed and the pressures recalculated, until the values
are satisfactory.
⚫ The moment in the plate is calculated, and the plate
thickness is determined.
⚫ The critical section for bending is assumed to be at the
center of the flange on the side where the compression is
highest (can also be assumed that the point of maximum
moment is located at some other point, such as at the
face of the flange or the center of the anchor bolt)
Ref: McCormac and Csernak, Structural Steel Design, 5th Ed.
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Moment Resisting Column Base Plates
⚫ The moment is calculated for a 1-in-wide strip of
the plate and is equated to its resisting moment.
The resulting expression is solved for the required
thickness of the plate
Ref: McCormac and Csernak, Structural Steel Design, 5th Ed.
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Moment Resisting Column Base Plates
Ref: McCormac and Csernak, Structural Steel Design, 5th Ed.
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Moment Resisting Column Base Plates
Ref: McCormac and Csernak, Structural Steel Design, 5th Ed.
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