ゴム支承の経年変化と静的特性

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This report describes estimation of the durability of CR rubber bearing pads, used on a shoe of prestressed concrete railway bridge, from the physical property studied of these pads 17 years in use and the aging property of the original rubber compound.The long used CR rubber bearing pads had a good physical property, but the decrease in their thickness was about 0.6mm per piece.The fatigue life which was estimated from the results of the static accelerating aging tests on the original rubber compound is as follows; about 85 years according to tensile test: 190 to 220 years in terms of compression set; and about 200 years in terms of static shear modulus of elasticity.
日本ゴム協会の論文