Column-Foundation Connection (Stiffened Baseplate) Design per AISC 360-16 & Design Guide 1

How does ideCAD design Column-Foundation Connection (Stiffened Baseplate) according to AISC 360-16 & Design Guide 1?

Limit states of Column-Foundation Connection (Stiffened Baseplate) are checked automatically according to AISC 360-16 & Design Guide 1.

Anchor Rod Concrete Pullout limit state is checked automatically according to ACI 319M-18.

Symbols

A_b: Non-threaded bolt web characteristic cross-sectional area
A_g: Gross area
A₁: Area of the base plate,
A₂: Area of the supporting surface
d: Characteristic diameter of the stem of the bolt (the diameter of the non-threaded stem of the bolt)
d_h: Bolt hole diameter
e: equivalent eccentricity
f_c: Concrete design compressive strength
F_y: Structural steel characteristic yield strength
F_u: Structural steel characteristic tensile strength
s: Distance between bolt-hole centers
L_c: The clear distance between bolt holes
L_e: The distance from the center of the bolt hole to the edge of the assembled element
L_eh: The horizontal distance from the center of the bolt hole to the edge of the assembled element
L_ev: The vertical distance from the center of the bolt hole to the edge of the assembled element
t: Plate thickness
w = Size of weld leg, in. (mm)
R_n: Characteristic strength

GEOMETRY CHECKS

Bolt Spacing

The distance between the centers of bolts is checked per AISC 360-16.

s_min ≥ 3d	AISC 360-16 J3.3
s	180 mm
d	24 mm	s =180 mm > s_min = 3*24=72 mm	√

Horizontal Edge Distance

The distance from the center of the hole to the edge of the connected part in the horizontal direction is checked per AISC 360-16.

L_eh ≥ L_e-min	AISC 360-16 J3.4
L_eh	70 mm	L _eh ≥ 2d = 2 * 24 = 48 mm conformity check for application	√
L_{e- min}	30 mm	Minimum distance check according to Table J3.4	√

Vertical Edge Distance

The distance from the center of the hole to the edge of the connected part in the vertical direction is checked per AISC 360-16.

L_ev ≥ L _e-min	AISC 360-16 J3.4
L_ev	45 mm
L_e-min	30 mm	Minimum distance check according to Table J3.4	√

Strength Controls

Base Plate Thickness (Compession)

The required plate thickness is determined according to AISC Steel Design Guide 1 Eq.3.3.15a.

f_c	25000 kN/m²
A₁
A₂
q_max
f_p(max)
f_p(max)
e
e_crit
Y
Y
f
l_e	45 mm
l	max(m,n)=141.25
m
n
h	650 mm
b	300 mm
N	900 mm
B	500 mm
M	365.17 kNm
P	739.22 kN
_y	355 N/mm²
t_req		AISC DG-1-2^nd 3.3.15.a

Required	Available	Ratio	Control
41.11 mm	42 mm	0.979	√

Base Plate Thickness (Tension)

The required base plate thickness for tension is determined according to AISC Steel Design Guide 1 Eq.3.4.7a.

f_c	25000 kN/m²
A₁
A₂
q_max
e
e_crit
T
Y
Y
f
x
l_e	45 mm
m
h	650 mm
N	900 mm
B	500 mm
M	365.17 kNm
P	739.22 kN
F_y	355 N/mm²
t_req		AISC DG-1-2^nd 3.4.7a

Required	Available	Ratio	Control
15.312 mm	42 mm	0.365	√

Anchor Rod Tensile Rupture

The limit state of the anchor rod tension rupture is checked according to AISC 360-16.

A_b
F_n	750000 kN/m²
R_n		AISC 360-16 J3-1
ΦR_n

Required	Available	Ratio	Control
28.779 kN	254.469 kN	0.113	√

Anchor Rod Concrete Pullout

The limit state of the anchor concrete pullout is checked according to ACI 318M-08.

Ψ	1.0	ACI 318M-08 D.5.3.6
N_p		ACI 318M-08 (D-15)
A_bgr	7401.592 mm²
f_c	25000 kN/m²
R_n		ACI 318M-08 (D-14)
ΦR_n

Required	Available	Ratio	Control
28.779 kN	1036.222 kN	0.028	√

Anchor Rod Shear

The calculation is made using the Elastic method, one of the methods selected in the steel analysis settings tab. In this check, the operation is performed on half of the symmetry axis and is calculated to form a force pair with the required force.

A_b
F_n
R_n		AISC 360-16 J3-1
ΦR_n

Required	Available	Ratio	Control
9.885 kN	152.681 kN	0.065	√

Bolt Bearing on Plate

The bearing strength limit states of the base plate, which are “shear tear out” and “ovalization of bolt hole” for both end and inner bolts, are checked according to AISC 360-16.

d_h	24+3=27 mm
L_c,edge
R_n		AISC 360-16 J3-6a
R_n-edge
R_n
ΦR_n

Required	Available	Ratio	Control
9.885 kN	559.629 kN	0.018	√

Next Topic

Column - Foundation Connection (Stiffened Baseplate) Report

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