老化及海蚀作用下近海桥梁隔震支座橡胶材料性能劣化试验

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Abstract

Rubber block and rubber sheet are designed and put in the same test environment as the natural rubber isolator, the rubber property, such as hardness, stress in definite strain, tensile strength and elongation at break, under pure aging, pure marine corrosion and combined action both aging and marine corrosion are studied, and the corresponding change rules are given. The test results indicate that aging is still the main factor to influence the natural rubber property; water ratio of rubber can greatly affect their performance; along with the growth of the aging time, hardness and stress at definite strain of the rubber were increased, but tensile strength and elongation at break were decreased; the influence of pure marine corrosion on hardness and stress at definite strain is not obvious, but tensile strength and elongation at break is reduced along with the growth of the marine time; under the combined action both aging and marine corrosion, the property deterioration of the natural rubber will be more serious, especially when the rubber occur large strain; from the surface to the inner of the rubber block, the rubber property parameters are slightly decreased, the property deterioration generally occurr in the rubber surface, and the property of the inner rubber were seldom changed.

Key words： offshore bridge aging marine corrosion natural rubber property deterioration

Received: 27 March 2015 Published: 15 August 2016

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2016/V35/I16/114

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