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Structural Anchor Analysis

The document summarizes existing analyses of column anchorage and a base plate for a tower. It analyzes anchor bolts based on allowable tensile and shear stresses, and finds the required embedded length is 131.65 cm which is less than the used length of 224 cm. It also analyzes the base plate based on required area from maximum force and allowable stresses, finding the used base plate area and thickness are adequate. All calculated stresses are below the allowable values.

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Bagus Prahutdi
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377 views6 pages

Structural Anchor Analysis

The document summarizes existing analyses of column anchorage and a base plate for a tower. It analyzes anchor bolts based on allowable tensile and shear stresses, and finds the required embedded length is 131.65 cm which is less than the used length of 224 cm. It also analyzes the base plate based on required area from maximum force and allowable stresses, finding the used base plate area and thickness are adequate. All calculated stresses are below the allowable values.

Uploaded by

Bagus Prahutdi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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EXISTING ANCHOR ANALYSIS

Column Anchorage
Analysis Based on AISC - ASD '89
Anchor Bolt JIS G3112
Fy =

245

Mpa

2498.31

f'c =

18.68

Mpa

190.43

Concrete
Maximum Force at Tower Base
Pmax =

994.43

KN

101404.32

Tmax =

759.42

KN

77439.17

Smax =

91.73

KN

9353.38

32

mm

64.34

cm2

749.49

kg/cm2

1873.74

kg/cm2

Allowable tensile stress of anchor bolt


Used Anchored :

8
A=

Fv =

0.3 Fy =

Ft =

0.75 Fy =

fv =

S/A =

145.37

kg/cm2

<

145.37

kg/cm2

<

1.4 Ft - 1.6Fv =

2390.63

kg/cm

>

Use Fts = Ft =

1873.74

kg/cm2

T/A =

1203.60

kg/cm2

<

1203.60

kg/cm2

<

7.31

kg/cm2

131.65

cm

224.00

cm

Fts =

ft =

Requaired embeded length of anchor bolt


Fcv =

0.53 x f'c =

Le =

T/(Fcv x n x Pl x D) =

Used length of anchor bolt

>

EXISTING BASE PLATE ANALYSIS

Column Base Plate (Circle)


Analysis based on AISC - ASD '89
Steel ASTM A36/JIS G3101 grade SS-400
Fy =

240

Mpa

2447.33

f'c =

18.68

Mpa

190.43

66.65

Concrete

Fp =

0.35* f'c

Maximum Force at Tower Base


Pmax =

994.43

KN

101404.32

Tmax =

759.42

KN

77439.17

Smax =

91.73

KN

9353.38

Ar =

P/Fp =

1521.41

cm2

Fb =

0.75 fy =

1835.50

kg/cm2

Requaired Area of Base Plate

Used Plate with:

56.00

tp

1.80

Ab

2463.01

Ab =

2463.01

cm2

>

2463.01

cm2

>

fp = P/A =

41.17

kg/cm2

<

41.17

kg/cm2

<

Base Plate Thickness


m=

6 cm

M=

0.5*q*m^2 =

741.08 kgcm

fb =

6M/(tp^2) =

1372.36 kg/cm2

<

1372.36 kg/cm2

<

kg/cm2

kg/cm2

kg
kg
kg

Fv
749.49

kg/cm2

OK

kg/cm2

OK

Ft

Ft
1873.74

131.65 cm

OK

kg/cm2

kg/cm2
kg/cm2

kg
kg
kg

cm
cm
cm2

Ar
1521.412

cm2

OK

kg/cm2

OK

kg/cm2

OK

Fp
66.65

Fb
1835.50

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