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来源:百度知道 编辑:UC知道 时间:2024/06/16 13:14:40
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.

近几年来,高阻尼橡胶桥支座由于它以其卓越的性能提供高阻尼和弹性被广泛运用。但是,对于HDR在使用寿命期内逐渐老化问题则很少有系统化的研究,长期的性能在设计阶段通常不被考虑。在本研究中,通过对HDR小板块进行加速热量氧化测试来检查HDR桥支座的内部的性质变化。一个老化预测模型被开发出来评估性质的大致情况。然后利用一个构成模型和进行FEM分析,阐述了HDR桥支座在其使用寿命期内的表现。一个设计程序被提出,即要把场所环境里的长期表现考虑在内。

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