Alviksbron
Alviksbron (Swedish for "The Alvik Bridge") is a box girder bridge in central Stockholm, Sweden. Stretching over Oxhålssundet, it connects Stora Essingen island to the western suburb Bromma. Built 1996-1998 by the Nordic Construction Company at a cost of 180 million SEK, it has served the Tvärbanan light rail line and pedestrians and bicyclists since its inauguration in August 2000. The name is derived from Alvik, originally a local manor house built in 1819 and demolished in 1930.

The bridge is 400 metres in length with a 140-metre central span and a horizontal clearance of 24 metres. The underside of the bridge tie forms an arch intended to make the bridge as slender as possible. The two pillars standing in the water each consist of two thin concrete plates dressed in two-quarters brick with a common concrete foundation. They are illuminated after dark.

The construction is pre-tensioned longitudinally by cables, but non-tensioned across. The topside was stretched as the separate sections were added, while the underside was stretched after all the sections had been cast into a single compact unit.

Three years after the inauguration crack formations were discovered in the bridge. The shear fissures in the ribs had an angle of 25-30° and a length of 0.1-0.3 mm, and were found in greater number on the south side. This is thought to indicate that compressive stress from the longitudinal stressing in combination with heat from the sun caused the problem. The bridge was then reinforced, first temporarily using outside pre-stressing bars, and then permanently using carbon fibre laminates in sections with minor fissures, and tie struts in the worst affected sections.
Q9027
Swedish
Concept
Q1735471
box girder bridge
LOC
Q1754
Stockholm
LOC
Q34
Sweden
LOC
None
Oxhålssundet
UNK
Q1043368
Stora Essingen
LOC
Q10436033
Bromma
LOC
Q558699
Nordic Construction Company
ORG
Q122922
SEK
Concept
Q1760190
Tvärbanan
MISC
Q1268865
light rail
Concept
Q448970
Alvik
LOC
Q879050
manor house
Concept
None
bridge tie
UNK
Q12277
arch
Concept
Q40089
brick
Concept
Q13583542
shear
Concept
Q196672
rib
Concept
Q910977
carbon fibre
Concept
Q384943
laminate
Concept
Q448988
Alviksbron
LOC
1996-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1996
DATE
2000-08-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
August 2000
DATE
1819-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1819
DATE
1930-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1930
DATE
-1998^^http://www.w3.org/2001/XMLSchema#decimal
-1998
NUMBER
+24^^http://www.w3.org/2001/XMLSchema#decimal
24
NUMBER
+25^^http://www.w3.org/2001/XMLSchema#decimal
25
NUMBER
-30^^http://www.w3.org/2001/XMLSchema#decimal
-30
NUMBER
+0.1^^http://www.w3.org/2001/XMLSchema#decimal
0.1
NUMBER
-0.3^^http://www.w3.org/2001/XMLSchema#decimal
-0.3
NUMBER
country
terminus location
named after
country
country