318/349 appendix using GTSTRUDL and

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Nov 29, 2013 (3 years and 10 months ago)

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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


GTSTRUDL User’s Group Annual Meeting 2004

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


GTSTRUDL User’s Group Annual Meeting 2004

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)


GTSTRUDL User’s Group Annual Meeting 2004

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



11

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


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



12

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



13

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








GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



14

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



15

Analytical Model


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



16

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



GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



17


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



18

Analytical Model

Typical Isometric Model


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



19

Analytical Model

Plate Model and Geometry


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



20

Analytical Model

Non Linear Spring Layout


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



21

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



22

Analytical Model

Layout of Welding Geometry


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



23

Developing Computer

Program


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



24

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.


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



25

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”


GTSTRUDL User’s Group Annual Meeting 2004

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


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



27

Function of Pre
-
Processor


Define Welding Shape


7 pre
-
defined welding shape and User
defined shape


Welding Shape in Program

Actual Welding


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



28

Function of Pre
-
Processor

Selecting Anchor from DB

Define Welding Shape

Applied Loads

Basic Input File from program


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



29

Function of Pre
-
Processor

Program EPAAD

GTSTRUDL Input Files

By Program

Anchor System Model

Basic Input File from program


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



30

Result of Analysis

Sample of Result


1. Applied

: 120K

2. Reactions

: 131K

3. VM Stress : 11.8 ksi



GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



31

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


GTSTRUDL User’s Group Annual Meeting 2004

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


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



33

Result of Analysis &

Conclusion


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



34

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


GTSTRUDL User’s Group Annual Meeting 2004

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



37

Demonstration


GTSTRUDL User’s Group Annual Meeting 2004

Analysis Concrete Anchor System with ACI using GTSTRUDL and Developing Pre/Post processor



38

Thank You