Railway
y Bridge
g
Brunngraben
g
n
Special Session:
Austrian experience of using Euroccodes for bridge design
Challenges and opportunities
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Introduction
Brunngraben Bridge – Styria
single span steel bridge with open rail trac
ck
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Introduction
longitudinal
g
cu
ut
effective span = 14,44 m
rail track
owest line of
old structure
+ 630,50
630 50 m
clearance
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
lowest line of
new structure
+ 630,42
630 42 m
Dr. Thomas Petraschek
Initial Situation
-
straight bridge with straight and curved railway track
min. 5000 mm clear width betwe
een top flanges
max. construction height 1220 m
mm
width of top flanges 500 mm
lack of stiffeners
span range from 10 – 20 m
[Fink J.,
J Ku
uss St
St., NEW RAILWAY TROUGH BRIDGES
BRIDGES, 2007]
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Statics
principle cross section for a span range of 10 – 20 m
[Fink J
J., Ku
uss St
St., NEW RAILWAY TROUGH BRIDGES
BRIDGES, 2007]
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Statics
–
self weight an dead loads (road bed,
bed sleepers,
sleepers rails)
load model LM71, SW/2 and “un
nloaded train”
starting and breaking force
nosing force
wind force
temperature
derailment force
earthquake force
998 (comprising NAD)
defined in EN 1990, 1991 and 19
[Fink J.,
J Ku
uss St
St., NEW RAILWAY TROUGH BRIDGES
BRIDGES, 2007]
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Statics
load model LM71 for local dimensionin
ng
[Fink J., Kuss St., NEW RAILWAY TROUGH BRIDGE
ES, 2007]
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Statics
standard cross section - end supporting
pp
g detail
[Fink J.,
J Ku
uss St
St., NEW RAILWAY TROUGH BRIDGES
BRIDGES, 2007]
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Non deformability
additional degrees of freedom
natural mode for
l t l ttorsional
lateral
i
lb
buckling
kli
[Fink J.,
J Ku
uss St
St., NEW RAILWAY TROUGH BRIDGES
BRIDGES, 2007]
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Secondary moments
bending mom
ments for the
transversal bridge direction [kNm/m]
[Fink J.,
J Ku
uss St
St., NEW RAILWAY TROUGH BRIDGES
BRIDGES, 2007]
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Secondary moments
three critical problems
- loading of the web about the weak
w
axis
- filled welds are stressed about their weak axis
- much severe detail category fo
or the weld
[Fink J.,
J Ku
uss St
St., NEW RAILWAY TROUGH BRIDGES
BRIDGES, 2007]
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Detailed planning
welding detail
deck plate
transition in direction of force
execute free from notches
transition in direction of force
execute free from notches
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Detailed planning
transition grinding
g
g
free from notches
welding detail
connection
deck plate to web
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Standards
Global family of standard
ds for steel constructions
Eurocodes
Execu
utionstand
dards
Materialstandards
EN 1990-EN 1999
z.B. EN
N 1090
z.B. EN 10025-2
Design
Specificcation of
compo
onents
Material, products,
testing methods
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
EN 1090-2
S
Specifications
ifi ti
and
d dokumentation
d k
t ti n
EN 1090-2, 4.1.1: Execution Speciification – General
The necessary information and tech
hnical requirements for execution of
each part of the works shall be agre
eed and complete before
commencement of execution of thatt part of the works.
–
–
–
–
–
additional information, as liste
ed in A.1
options, as listed in A.2
execution classes, see 4.1.2
preparation grades, see 4.1.3
3
tolerance classes, see 4.1.4
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
EN 1090-2
EN 1990, Annex B
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
EN 1090-2
?!?
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Execution
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Execution
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Execution
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek
Conclusions
Thank y
you for y
your attention!
Workshop „Bridge Design to Eurocodes – Background and Applicatio
ons“
Dr. Thomas Petraschek