ABSTRACT
There are some techniques to remove those expansion joints and to make a new continuous bridge from series of simple span bridges. Slab link method is one of those methods to connect adjacent slabs. Slab link is a very effective method not only for removing expansion joints but also improving environmental and driving performance. It can be applied to wide variety of bridges without major restrictions. However, there are some construction difficulties in application to urban expressway in terms of limited construction time restrictions.
In this paper, two new methods are proposed and the series of experiment reveals that the two methods shows better performance in terms of bearing and fatigue capacity compared to the conventional methods. Photo of the test. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig309_1.jpg"/> List of experimental models.
Slab link
Model A
Model B
Model C
Cross Section Specimen L = 2620 mm
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https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/pg540_3.tif"/>
Concrete Strength
27N/mm2
SFRC 271\7 mm2
SFRC 27N/mm2
Rebar Type
SD345
SD345
SD345
Axial Joining
①Upper Rebar
Continuity
Jl: Overlap Joint
Jl:Overlap Joint
②Lower Rebar
Continuity
SI: Separated
–
③Unbonded Layer
25 mm
25 mm
–
④Connecting Steel Plate Form
SS400 12 mm
SS400 12 mm
–
⑤Raised Bottom Plate with Studs
–
–
SS400 6 mm
Production Number
2
2
2
Protocol of development. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig309_2.tif"/> Loading method.Loading Type
Loading method
Loading steps (multiplied by design rotation angle)
Loading times
Static loading
Cyclic
0.113 L
5
0.226 L
5
0.339 L
5
0.45 L
5
Dynamic loading
Cyclic
0.5 L
260,000
0.75 L
260,000
1.0 L(θ = 1.88)
300,000
1.25 L
30,000
1.50L
30,000
2.00 L
30,000
2.50L
30,000
Total
940,000
Vertical displacement under static loading. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig309_3.tif"/> Chipping work of existed slab. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig309_4.jpg"/> Setting the raised bottom plate. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig309_5.jpg"/> After rebar setting. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig309_6.jpg"/> Completion of construction. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig309_7.jpg"/>Slab link is a very effective method not only for removing expansion joints but also improving environmental and driving performance. Slab link can be applied to wide variety of bridges without major restrictions. However, there are some construction difficulties in application to urban expressway in terms of limited construction time restrictions.
Moreover trial construction with the new design succeeded. It was confirmed that the big effect is being shown in the time reduction actually. This was the big one step about Slab link method that will connect in the future.
