Analysis Concrete Anchor System with ACI
318/349 appendix using GTSTRUDL and
Developing Pre/Post processor computer program
June 12, 2004
YoonHo Nam, PE
GTSTRUDL User
’
s Group Annual Meeting 2004
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
2
Contents
Functions
of Concrete Anchor System
Backgrounds of Study
Characteristics of Analysis
Analytical Model
Developing Computer Program
Result of Analysis
Conclusion
Demonstration of program
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
3
Functions of Concrete
Anchor system
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
4
Functions of Concrete Anchor system
Connecting devices of concrete and steel
structures
Connecting concrete wall and steel beam
Equipment/Pipe
supports to concrete
structures
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
5
Functions of Concrete Anchor system
Cast in placed Anchor
Headed Studs, Headed Bolts
Post installed Anchor
Sleeve, Wedge type expansion anchor
h
ef
h
ef
Cast in place Anchor
Post installed Anchor
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
6
Backgrounds of Study &
Characteristics of Analysis
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
7
Backgrounds of Study
Release to New Method of Design
Concrete Anchor System(ACI349, ACI318)
Impossible Application to use existing in

house program(Having Old Design Code)
Not Applicable Computer OS
Need to Make “NEW” computer Program
with appropriate Design Procedure
One of the “Wish List” at GTSUG 2003
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
8
Characteristics of Analysis (by NRC)
NRC Regulatory Conditions for Concrete
Anchor System
For Analysis : Calculating Anchor
Reactions Considering Plate Flexibility
(Need FEM Plate Analysis, IEB 79

02)
For Design : Evaluation Concrete cone
capacity according to ACI 349 Appendix
(NRC Reg. Guide 1.199 ,2003)
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
9
Characteristics of Analysis (by ACI349)
Failure Mode of Concrete Anchor System
Anchor Failure in Tension and Shear
N
s
Tension Failure
V
s
Shear Failure
ut
se
S
F
A
n
N
ut
se
S
F
A
6
.
0
n
V
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
10
Characteristics of Analysis (by ACI349)
N
cbg
Concrete Breakout
Failure Mode of Concrete Anchor System
Concrete cone strength in Tension
5
.
1
ef
'
c
b
3
2
1
No
N
b
3
2
1
No
N
cbg
h
f
k
N
Condition
Crack
Concrete
for
Factor
on
Modificati
The
Effect
Edge
for
Factor
on
Modificati
The
y
Eccentrict
Load
for
Factor
on
Modificati
The
Anchor
Single
/
Group
of
Area
Projected
A
/
A
N
A
A
N
c
1
1.5
h
ef
s
1
1.5
h
ef
1.5
h
ef
A
N
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Characteristics of Analysis (by ACI349)
Concrete cone strength in Tension
Detail Parameters
)
h
5
.
1
C
if
(
h
5
.
1
C
3
.
0
7
.
0
)
h
5
.
1
C
if
(
0
.
1
ef
min
ef
min
ef
min
2
T
2
T
1
T
1
+
T
2
e
N
'
s/
2
s/
2
C
0
.
1
)
h
3
e
2
1
(
1
ef
'
N
1
C
T
T
N
2
1
n
c
1
1.5
h
ef
s
1
1.5
h
ef
1.5
h
ef
A
N
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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N
pn
Concrete Pullout
N
sb
Concrete Side Face Blowout
Failure Mode of Concrete Anchor System
Concrete cone strength in Tension
Characteristics of Analysis (by ACI349)
Condition
Crack
Concrete
for
Factor
on
Modificati
The
Head
Anchor
of
Area
A
f
8
A
N
4
brg
'
c
brg
4
pn
Concrete
of
ce
tan
Dis
Edge
C
Head
Anchor
of
Area
A
f
A
C
160
N
brg
'
c
brg
sb
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Characteristics of Analysis (by ACI349)
Concrete Breakout
V
cbg
Failure Mode of Concrete Anchor System
Concrete cone strength in Shear
5
.
1
1
'
c
o
2
.
0
o
b
7
6
No
N
b
7
6
No
N
cbg
C
f
d
)
d
l
(
7
V
Condition
Crack
Concrete
for
Factor
on
Modificati
The
Effect
Edge
for
Factor
on
Modificati
The
Anchor
Single
/
Group
of
Area
Shear
Projected
A
/
A
V
A
A
V
V
cp
Concrete Pryout
5
.
1
ef
'
c
cb
ef
ef
cp
cb
cp
cp
h
f
k
N
in
5
.
2
h
for
0
.
2
,
in
5
.
2
h
for
0
.
1
k
N
k
V
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Characteristics of Analysis (by ACI349)
Evaluation Shear

Tension Interaction
2
.
1
V
V
N
N
N
2
.
0
N
and
V
2
.
0
V
)
3
OK
is
V
V
,
N
2
.
0
N
)
2
OK
is
N
N
,
V
2
.
0
V
)
1
n
u
n
u
n
u
n
u
u
n
n
u
u
n
n
u
2
.
1
V
V
N
N
n
Interactio
Trilinear
n
u
n
u
n
V
2
.
0
n
N
2
.
0
0
.
1
)
V
V
(
)
N
N
(
n
Interactio
Elliptical
3
5
n
u
3
5
n
u
n
V
n
N
u
N
u
V
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Analytical Model
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Analytical Model
Plate Model
For calculating Von Meises Stress, use
Plate Element having 6

DOF
Welding line is modeled Rigid Plate using
constraint Option for distribution of applied
Load
Expansion Anchor or Stud
use 3

DOF space Frame Members
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Plate contacted with Concrete Wall or Slab
use Nonlinear Compression only Spring
Boundary Condition
Restraint for 6

DOF : Anchor Support
Restraint for 3

transmittal DOF :
Connecting Point of Anchor with Plate
Spring Stiffness
Analytical Model
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Analytical Model
Typical Isometric Model
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Analytical Model
Plate Model and Geometry
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Analytical Model
Non Linear Spring Layout
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Analytical Model
Plot of NLS Curve '8 '
Displacement (INCHES)
0
100
0
1e+005
2e+005
3e+005
4e+005
5e+005
Force (KIPS)
Plot of NLS Curve 'EDGE '
Displacement (INCHES)
0
1
1
0
1e+003
2e+003
3e+003
1e+003
2e+003
3e+003
Force (KIPS)
Stiffness of Vertical Spring Element
Stiffness of Horizontal Spring Element
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Analytical Model
Layout of Welding Geometry
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Developing Computer
Program
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Developing Computer Program
Easy to use Computer Program
Direct making Text Input or Input File
Created by GUI
Automatic Generating Compression Spring
at each Joint
Distributing Applied Loads to the welding
Line
Automatic execution GTSTRUDL
Evaluation of Concrete & Anchor
capacities according to ACI 349/318 App.
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Developing Computer Program
Input File
Non Linear
Static
Analysis
Using GTSTRUDL
Evaluation of
Anchor
System
EPAAD(Pre

Processor)
•
Generating GTSTRUDL Input File
•
Generating Non

linear Spring and
Distributing Applied Loads to Plate
Joint with Constraint
•
Executing GTSTRUDL
•
EPAAD(Post

Processor)
•
Calculating eccentricities of anchor load
•
Evaluation of Anchor System
using Anchor Result of GTSTRUDL
Concept of Computer Program “EPAAD”
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
26
Function of Pre

Processor
Embedded Plate Type : C1
H = 12in, W = 12in, T = 1in
No. of Anchor =
ø
0.75in x 4EA
Anchor Length = 7.625in
Anchor DB
Anchor System Data Base
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Function of Pre

Processor
Define Welding Shape
7 pre

defined welding shape and User
defined shape
Welding Shape in Program
Actual Welding
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Function of Pre

Processor
Selecting Anchor from DB
Define Welding Shape
Applied Loads
Basic Input File from program
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Function of Pre

Processor
Program EPAAD
GTSTRUDL Input Files
By Program
Anchor System Model
Basic Input File from program
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Result of Analysis
Sample of Result
1. Applied
: 120K
2. Reactions
: 131K
3. VM Stress : 11.8 ksi
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Function of Post

Processor
Calculate
Anchor
Reactions
(Tension
&
Shear)
Tension
Steel
Strength
Concrete
Strength
Breakout
Pryout
Find
Controlled
Failure
Mode
Find
Controlled
Failure
Mode
Find
Appropriate
Strength
Reduction
Factor
Find
Appropriate
Strength
Reduction
Factor
Calculate
Design
Strength
Calculate
Design
Strength
Check
Anchor
Strength
Interaction
Ratio
(Tension,
Shear,
Combined
Tension
&
Shear)
Check
Plate
Strength
Shear
Steel
Strength
Concrete
Strength
Pullout
Side

face
Blowout
Breakout
Flow Chart
for
Evaluation
Anchor System
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
32
Function of Post

Processor
Evaluation of Anchor System
Result Window
Evaluation of Anchor System from program
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Result of Analysis &
Conclusion
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Comparing Results
Anchor
No.
GTSTRUDL
In House
Program
RATIO
Rem.
1
0.773
0.731
1.06
2
0.648
0.674
0.96
3
0.240
0.232
1.03
4
1.311
1.368
0.96
5
0.647
0.674
0.96
6
1.303
1.244
1.05
7
1.310
1.368
0.96
8
0.770
0.731
1.05
Sum
7.002
7.022
Von Mises
Stress
3.907
3.904
1.00
Comparing Anchor Reactions
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
35
Comparing Results
Contents
EPAAD
Hand
Calc.
Rem
1. Tensile Strength
1) Steel Strength of Fastener in Tension
18.4
18.408
2) Concrete Breakout Tensile Strength
61.8
61.82
3) Fastener Pullout Tensile Strength
33.1
33.134
2. Shear Strength
1) Steel Strength of Fastener in Shear
18.4
18.408
2) Nominal Concrete Pryout Strength
75.6
75.626
3) Concrete Breakout Shear Strength(

Y

dir.)
85.299
85.299
3. Evaluation Results for Anchor
1) Interaction Ratio for Tension (CONCRETE BREAKOUT)
0.252
0.252
2) Interaction Ratio for Shear (CONCRETE BREAKOUT)
0.427
0.427
3) Interaction Ratio for Combined Tension & Shear (<= 1.2)
0.679
0.679
4. Evaluation Results for Plate Bending
1) Maximum Von Mises Stress
3.907
3.907
2) Allowable Bending Stress
32.4
32.4
3) Interaction Ratio for Plate Bending
0.121
0.121
Comparing Concrete Cone Capacities
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Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
36
Conclusion
The Results of Non Linear Static Analysis
by GTSTRUDL can be applied for
Designing Anchor System.
The Results of Study can apply Designing
of Base Mat Structure with Non Linear
Dynamic Analysis.
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
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Demonstration
GTSTRUDL User’s Group Annual Meeting 2004
Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor
38
Thank You
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