Study on the Long-Term Deterioration of Natural Rubber of Bridge Bearings

Itoh, Yoshito; Satoh, Kazuya; Gu, Haosheng; Yamamoto, Yoshihisa

doi:10.2208/jscej.2005.801_185

“…From the results of the same tests on NR blocks 12) , it is found that generally HDR and NR have a similar tendency of property variation. Both U100 and EB profiles display the features of a diffusion-limited oxidation.…”

Section: (2) Test Results and Examinationsmentioning

confidence: 88%

“…In the previous research, Itoh et al 12), 13) studied the long-term performance of natural rubber (NR) bridge bearings. Through accelerated thermal oxidation tests carried out on NR blocks, the deterioration characteristics of both the outer and the interior regions were examined.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Deterioration of High Damping Rubber Bridge Bearing

Itoh

¹

,

Gu

²

,

Satoh

³

et al. 2006

JSCE JOURNAL OF STRUCTURAL AND EARTHQUAKE ENGINEERING

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In recent years, high damping rubber (HDR) bridge bearings have become widely used because of the excellent ability to provide high damping as well as flexibility. However, there are few systematic studies on the deterioration problems of HDRs during their service life, and usually the long-term performance was not considered in the design stage. In this research, through accelerated thermal oxidation tests on HDR blocks, the property variations inside the HDR bridge bearing are examined. A deterioration prediction model is developed to estimate the property profiles. Then using a constitutive model and carrying out FEM analysis, the behavior of a HDR bridge bearing during its lifespan is clarified. A design procedure is proposed that takes the long-term performance in the site environment into consideration.

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Analysis on Internal Temperature Distribution of High Damping Rubber Bridge Bearing Under Low Temperature Vibration

Oshima¹,

Nakamura²,

Yamazaki³

et al. 2008

JSCE JOURNAL OF STRUCTURAL AND EARTHQUAKE ENGINEERING

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Long-Term Deterioration of High Damping Rubber Bridge Bearing

Itoh

¹

,

Gu

²

,

Satoh

³

et al. 2006

Structural Eng./Earthquake Eng.

Self Cite

View full text Add to dashboard Cite

In recent years, high damping rubber (HDR) bridge bearings have become widely used because of the excellent ability to provide high damping as well as flexibility. However, there are few systematic studies on the deterioration problems of HDRs during their service life, and usually the long-term performance was not considered in the design stage. In this research, through accelerated thermal oxidation tests on HDR blocks, the property variations inside the HDR bridge bearing are examined. A deterioration prediction model is developed to estimate the property profiles. Then using a constitutive model and carrying out FEM analysis, the behavior of a HDR bridge bearing during its lifespan is clarified. A design procedure is proposed that takes the long-term performance in the site environment into consideration.

show abstract

Study on the Long-Term Deterioration of Natural Rubber of Bridge Bearings

Cited by 3 publications

References 8 publications

Long-Term Deterioration of High Damping Rubber Bridge Bearing

Long-Term Deterioration of High Damping Rubber Bridge Bearing

Analysis on Internal Temperature Distribution of High Damping Rubber Bridge Bearing Under Low Temperature Vibration

Long-Term Deterioration of High Damping Rubber Bridge Bearing

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