1 8

Stress Measurements on Transverse Beams and Longitudinal Beams End of the Yodogawa Bridge

Luiza H. ICHINOSE Yosihiro NATSUAKI Kanshirou MASUDA Masahiro SAKANO

192620.8m 723.3m 302005 20,000

/12 12.7%80

22

1) 7) 6 4.0m

32.918m

246

6

ABSTRACT As a result from a series of site measurements and inspections carried out with the objective of evaluating the structural health on an 85 years old truss bridge, repair works were executed at locations having inadequate structural details, defective welding or cracks. After detailed inspections at the longitudinal-to-transverse beam connections, dynamic loading test and stress measurement under traffic load were carried out to investigate the structural behavior of the transverse beams and longitudinal beam ends. Considerations on fatigue life were also made. Keywords:

Dynamic loading test, stress measurement, fatigue life, longitudinal-to-transverse beam connection, truss bridge

-1

- 1 -

2 8

246

-22 P13-P14 P14-P15

-3

P13-P14 B91 10mm

P14-P15 B8P13-P14 P14

P13-P14 G3-G4

-2

-3 P13-P14 P14-P15

- 2 -

3 8

24

-4

-5 -6

40km/h

-7

-4

-5

14180kg 12670kg 27430kg

B-1 B-4

B-5, B-6

- 3 -

4 8

8)

72

-8-9

-8

St8B11σ=51.6N/mm2

St5 σ=-21.4N/mm2

-10

-8

-7 -6

St 8

St 5

B11

B11

- 4 -

5 8

B8 G3

σ=15.5N/mm2

-910mm

-9

-10 St8

G3

G3

- 5 -

6 8

72 -11 -12

-11C-3 , -12

B-3

B-3 -10

72-1

H’ B8476

,

D 9)

27 St8

-12B-3-Y

0MPa

20MPa

-20MPa

60MPa

40MPa

-40MPa

-60MPa

Count %

-11C-3 -Z

0MPa

20MPa

-20MPa

60MPa

40MPa

-40MPa

-60MPa

Count %

- 6 -

7 8

St8

St8

1

- 7 -

8 8

H’476

D27

1) 66

CS7-004 2011.9 2)

19 pp. 651-656 2011.11

3)

19 pp. 657-664 2011.11 4) Ichinose

19 pp. 665-670 2011.11 5)

20 pp. 663-670 2012.11 6)

20 pp. 671-6782012.11

7) 20 pp.

679-684 2012.11 8)

1996.3 9)

2002.3

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