CivEng Georg Wolff - Railway Bridge Design Important Items for Long Life Span

8/18/2019 CivEng Georg Wolff - Railway Bridge Design Important Items for Long Life Span

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Railway Bridge Design

Important items for a long life span:interaction structure to track

and bearing selection

B G

A recommendation of


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T E A B C (EABC)

E T O B, T,

E U K T.

EABC G T .

T

EABC G S E T

T.


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I :

M. G OLFF

1951 A,

L/A,

& 1970.

S 1989

CEN (E S C)

TC 167 (EN 1337) TC 340 (EN 15129).


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E EOTA (E O

T A) ETAG 032 .

E ASI (A S I)

ONK14 B, EUROCODE,E .


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B EABC T (E

C C), M

C, A A.

C GRAIL & ROAD INFRASTRUCTURE

CEO C E S P L

S C E S

(T) C. L.


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T

/ /. T

.

I :

I


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*C .*H .

*C .

F R B

α

0,0

2,04,0

6,0

8,0

10,0

12,0

0 20 40 60 80 100 120 140 160

main span [m]

d i f f e r e n c

e

i n r

o t a t i o n

[

0 / 0 0

]

Railway / Concrete Girder Roadbridge / Composite Girder Railway / Concrete-Steel Beam Girder Roadbridge / Composite Arch StructureRailway / Steel Arch Structure


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T

!

T , ,

!


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S

FATIGUE!

S

.


11/62

I

.

S,

.


12/62

V DB

T ,

.


13/62

V D

.

T .

T ,

! T ! T

. EN 13373. A

, !

Elastomeric always cause fatigue bending of the rails!They are not suitable for railway bridges!


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T PU .

T

!

! !


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V D

.

T PTFE

. T 3 4 .

If PTFE sliding bearings are used, a 4 mm vertical deflectionby the time shall be considered at rail design!


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V D

At inclined bridge decks the moveable bearingsshall get installed inclined (not horizontally)!

B

. F

,

. T ,

.


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V D

Uplift devices shall work without play!

C , ,

( ) . I

() ,

.

I ,

, .


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H DE

T

()

. S . T

. I

.

L .

Floating bearing arrangementis unsuitable for railway bridges!


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If viaducts floating on unrestrained elastomeric bearings,the RAIL is bearing the horizontal forces, not the bearing!


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H

.

T

. T AASHTO, BS 5400, EN 1337

. T

! F ()

. A . T

(.. PTFE). S 2

5 . B !


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Railway bridge designer shall limit the bearing playin the tender specs to a measure acceptable for track design.

D . A

,

/ .

A , .. 0.5 , .


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TR 100

. A

.

A

,

+60C

ULS

.


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A maximum operating temperature of 60°C shall be considered.

T + 60C

. A

, .

A ,

:A . BS EN13372 F. D2

40 N/ 12.7

ULS 60C

3.2 100 .


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ST ,

. N

, .

B .

A ,

, .


25/62

S .. AASHTO (A A

S H O) P . S

,

.

A : B . BS 54009.

T 2000 BS

EN 1337. S .

AREMA (A R E & M

A) M F R E


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Use standards with great care only!

M

,

,

, ,

.ISO , E E

.


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Developed 1989 to 2000

11 parts

All approved design of

bearings included.

No special consideration

for railway bridges.

CE – marked bearings

including

Third party quality control

27

T

E S EN 1337 .


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28


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B

/ /

:


Bearing Selection


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• L

• H

• F

• S

• I

• V • H

• H

R E B

A R B


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• L

• H

• F

• S

• I

• V • H

• H

P B + PTFE P S B

A R B


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P :

V: , PTFEI: I ( )

Pot Bearings got wear and check problem

PTFE EAR

( )

Pot bearing design needs a play of some millimeter between lid and potwall inorder to allow rotation. So horizontal loads will always first be transferred to the

rail!

D h B h bl kli d b i


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P : :

Deutsche Bahn blacklisted pot bearings

due to wear and check problem

A AREMA .


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F

E P

I S

I ,

.


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• L

• H

• F

• S

• I

• V • H

• H

D B + PTFE D S B

A R B

Di B i


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Disc Bearing

Hidden Danger for Structural Collapse!You can never check the central shear pin once the bearing is installed!!!

38

:

C ,

(!)

. S

, !

T , USA,

E . .

T E S O CEN :


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DEUTSCHE BAHN use only elastomeric bearings (for verysmall structures) and UHMWPE spherical bearings!

?


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, ?


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• L

• H

• F

• S

• I

• V • H

• H

S R + R B

A R B


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The high loaded contact zone

roller/plate (Hertzian Stress)

can never be long-time

protected against corrosion

and cause sudden rupture

when overloaded.


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• L

• H

• F

• S

• I

• V • H

• H

S PTFE B

A R B


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T D S PTFE

,

S M PTFE

D PTFE E . AREMA 14 MP .


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SLIDING MATERIAL PTFE

D 50 PTFE

()

.

F 1960,

. T

.

PTFE WEAR


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.: PTFE = 30 MP

2.000

: PTFE = 45 MP

20.000

L PTFED PTFE 4 ..


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• L

• H

• F

• S

• I

• V • H

• H

S UHMPE B

A R B


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T D

S UHMPE ,

S M UHMPE


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S 1969 G

MAGLEV TRAIN

( ; T).

D PTFE

.

S 3 E

. A UHMPE (U

)

2002 E T A (ETA).


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!!

T

MSM

.

UHMPE 40

, ,

.

Sliding Material UHMWPE


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UHMWPE-Gleitlager (Streifen)

UHMWPE TEST at p = 50 MPa,v = 5 mm/s, after 10.000 meter

sliding:

NO WEAR!!

NO WEAR

Stand: 2003-12-09

Sliding Material UHMWPE


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52

Four

manufacturers

got EuropeanApproval for

UHMWPEspherical

bearings!

G B


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G B

T

. UHMPE S

. EN13372

:

UHMPE

S R

.


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A. AASHTO AREMA ,

. H . Q

. T

() B S.

B 100

. V

. S EN 1337

.


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T E Q S B .

EN 1337 . E T A

ETA.

F I TT . T

, ,

. T, I T

T .

T, ,

I T T.


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A

( )

,

. T .

I ,

. I

.

A

G 40 ,

.


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F CE ,

. T ,

C C, E U.://..////.

F UHMPE S B

T G

.


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S :

T 0.9

1.3 % ( ).

C :

– PTFE P S B: 100%

– E B 70%

– D B 80%

– PTFE S B 110%

– UHMPE S B 90%

Tender Text


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Tender Text

A ://..//799/RAILA%20BRIDGE%20BEARING%20TENDER

%20TET%202016.?=0

T :

» A . EN 1337 ETA.

» E 10 .

» M : UHMPE

» V /

0.5


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Contact

Georg M. Wolff

Civil Engineering Solutions (Thailand) Co. Ltd.

Tel.: +66 84 555 8781, [email protected]

Grand Sethiwan 29C, 82 Sukhumvit Soi 24, Klongton, Klongtoey,

Bangkok 10110 Thailand

EABC Member of the Board of Directors,

Representing Advantage Austria,

EABC Chair Working Group Rail & Road Infrastructure

www.eabc-thailand.eu, www.advantageaustria.org/th


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Important items for a long life span:

interaction structure to trackand bearing selection

B G

A recommendation of

Date post:	07-Jul-2018
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CivEng Georg Wolff - Railway Bridge Design Important Items for Long Life Span

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