There are a large number of damping materials in high-damping rubber (HDR) bearings, so the HDR bearings have the characteristics of both common rubber bearings and damping measures and show good aseismic effect. In this paper, the time-history dynamic analysis method is used to study the seismic effects of HDR bearings on the aseismic behaviors of two-span simply supported beam bridge under Northridge earthquake by changing the damping characteristics of the bearings. It is found that, with increasing damping of the bearings, both the horizontal shear and the displacement of the HDR bearings decrease, and the seismic energy dissipates through both the yield deformation and damping of the bearings. Although the girder and bearings have smaller displacement, when the HDR bearings with larger damping, the seismic responses, including displacement of pier top, shear force of pier bottom, and bending moment of pier bottom, are hardly affected by the change of the damping of the bearings. The HDR bearings with higher damping and yield characteristics separate and dissipate the seismic energy transmitted to the superstructure of the bridge and have better seismic effect on the structure in an earthquake.

中文翻译：

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高阻尼橡胶轴承材料特性对两跨简支梁桥抗震性能的影响

高阻尼橡胶（HDR）轴承中阻尼材料很多，因此HDR轴承具有普通橡胶轴承和阻尼措施的特性，并具有良好的抗震效果。本文采用时程动态分析方法，通过改变轴承的阻尼特性，研究了HDR轴承在北岭地震作用下对两跨简支梁桥抗震性能的影响。发现，随着轴承阻尼的增加，HDR轴承的水平剪切力和位移都减小，并且地震能量通过轴承的屈服变形和阻尼而消散。尽管大梁和轴承的位移较小，但是当HDR轴承具有较大的阻尼时，地震响应，轴承的阻尼变化几乎不会影响桥墩的位移，桥墩的剪力和桥墩的弯矩。具有较高阻尼和屈服特性的HDR轴承可分离并消散传递到桥梁上部结构的地震能量，并在地震中对结构具有更好的地震作用。