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首页> 外文期刊>Journal of Earthquake Engineering >BIDIRECTIONAL MODELLING OF HIGH-DAMPING RUBBER BEARINGS
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BIDIRECTIONAL MODELLING OF HIGH-DAMPING RUBBER BEARINGS

机译：高阻尼橡胶轴承的双向建模

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摘要

High-damping rubber (HDR) bearings are used in seismic isolation applications for buildings and bridges, although no models are currently available for the accurate description of the shear force—deformation response under bidirectional loading. A strain rate-independent, phenomenological model is presented which effectively represents the stiffness, damping, and degradation response of HDR bearings. The model decomposes the resisting force vector as the sum of an elastic component in the direction of the displacement vector and a hysteretic force component parallel to the velocity vector. The elastic component is obtained from a generalised Mooney—Rivlin strain energy function, and the hysteretic component is described by an approach similar to bounding surface plasticity. Degradation is decomposed into long term ("scragging") and short term ("Mullins' effect") components. Calibration is carried out over a series of bidirectional test data, and the model is shown to provide a good match of slow strain-rate experimental data using a unique set of material parameters for all tests. A testing protocol and calibration of the model for use in design of structures with HDR bearings are discussed.
机译：高阻尼橡胶（HDR）轴承用于建筑物和桥梁的隔震应用，尽管目前尚无模型可用于准确描述双向载荷下的剪切力-变形响应。提出了一种与应变率无关的现象学模型，该模型有效地表示了HDR轴承的刚度，阻尼和退化响应。该模型将阻力矢量分解为位移矢量方向上的弹性分量和平行于速度矢量的磁滞力分量之和。弹性分量是从广义的Mooney-Rivlin应变能函数获得的，而滞回分量是通过类似于边界表面可塑性的方法描述的。降解分解为长期（“碎片”）和短期（“穆林效应”）成分。通过一系列双向测试数据进行校准，并显示该模型使用一组独特的材料参数对所有测试提供了慢应变速率实验数据的良好匹配。讨论了用于HDR轴承结构设计的模型的测试协议和校准。

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