Shonan Br. of R-134(welded joint between longitudinal trough rib and deck plate ) のバックアップ(No.2)

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• Shonan Br. of R-134(welded joint between longitudinal trough rib and deck plate ) へ行く。
  • 1 (2014-01-28 (火) 09:47:26)
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Shonan Br. of R-134(welded joint between longitudinal trough rib and deck plate ) †

1.Field of application †

Shonan Br. of R-134 in Kanagawa, Japan.

2.Circumstances of repair †

The holes of the pavement due to the fatigue cracks of orthotropic deck plates were found in September of 1999 after 13 years of service. And 322 cracs were found by inspection of the bridge. Then, repair with the reinforcement plates on the deck plates were applied. Furthermore, 122 cracks were found in the welded joint between longitudinal trough ribs and deck plates by inspection in 2003.The 122 cracs were repaired by welding.

3.Types of structure †

The outline of the bridge structure is as follows.

• Bridge length :
• Span length :
• Structure :

The cross section is shown in figure 1.

4.Details of loading †

Fluctuating loads due to vehicles live load. 3700 vehicles / 24hr. truck ratio : 18% in 2006

5.Description of damage †

The fatigue cracks were detected on welded joints between longitudinal trough ribs and orthotropic deck plates(Fig.2).

Fig.2 Crack location

Cause of fatigue cracks was as follows:

• Localized stress concentration which resulted from the out-of-plane of the deck plate deflection due to the wheel load.

6.Repair method applied †

Emergency repair

Stop holes were drilled at the crack tips(Fig.2).

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Fig.2 Stop hole

Permanent repair

The SFRC pavements were constructed on the orthotropic deck plates instead of asphalt pavements.(Fig.3,Fig.4,Fig.5,).And the change of the driving lane was carried out to move a wheel position and a fatigue damage point.

File not found: "ohira_sfrc_1.jpg" at page "Shonan Br. of R-134(welded joint between longitudinal trough rib and deck plate )"[ź��]

Fig.3 The typical cross-section of SFRC

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