THE STUDY ON RESISTANCE TO WIND FOR AWASHIRASAGI-OHASHI BRIDGE

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Hironori ISHII Yoichi YUKI Kaoru MATSUBARAMasaru YOSHIMURA and Toshiharu MOTOMURA

ABSTRACT The Awashirasagi Ohashi Bridge is a kind of cable stayed bridge and named "Cable Egret" because of the unique aesthetics. This bridge represented several issues in the stability of main girders and cables for wind effects during the design process. Wind tunnel tests were carried out to confirm the phenomena of girders and cables for wind and solve the problems. KEYWORDS :

Cable egret, wind tunnel test, flutter, wake galloping

11,291m

4140m 260m 105m 70m 575m 5

5@70m 350m 4 70m 86m 366m

1

第16回　鋼構造と橋に関するシンポジウム論文報告集（2013年8月） 土木学会

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260m 29.6m5.5m SW

1 34

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260m 80m50 60m

23

33

3 31)

11/121 0.02 0 3

FEM

+3

200H 350H 400H

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2)

SW SW

3(1)

30m/s 3(2)

3(3)SW

(2)

(1) (2) SW (3) (4)

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3)

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FEM

13

1),4),5) 4),5)

192 157kg/m 3

6)

2

L D L D

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2 107 2 2

2 3

10 15 6m/s0.1D

15 10

11V A 12

2 32 560mm 10mm

660mm 12mm 15m/s

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3 22 3 3

V A 132 3

0.052 15m/s

10m 20m

9 140.0049

0.0901

4 310

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1

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