Study on the Deterioration Characteristics of Natural Rubber Bearings

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

doi:10.2208/jsceja.62.255

“…Using the constitutive model of HDR materials proposed by Yoshida et al 5) , HDR bridge bearings are modeled with a three-dimensional finite elements methodology (FEM) 6), 13) , as shown in Fig.15. The basic information of the FEM model is presented in Table 4.…”

Section: Performance Prediction Of Aged Hdr Bridge Bearing (1) Fem Momentioning

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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“…(1) FEM modeling and analytical conditions Using the constitutive model of HDR materials proposed by Yoshida et al 5) , HDR bridge bearings are modeled with a three-dimensional finite elements methodology (FEM) 6), 13) , as shown in Fig.15. The basic information of the FEM model is presented in Table 4.…”

Section: Performance Prediction Of Aged Hdr Bridge Bearingmentioning

confidence: 99%

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