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SHAKING TABLE TESTS OF BRIDGES ISOLATED BY SLIDING BEARINGS

机译：滑动轴承隔离的桥梁的振动台测试

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摘要

Presented in this paper is shaking table tests of a bridge isolated by four different sliding bearings in order to investigate the seismic response with emphasis on frictional characteristics of the sliding bearings with different sliding materials, the effect of vertical, transverse excitation and the frictional coefficient difference on seismic responses, and the generation mechanism of vertical force variation at the sliding bearings. The test results showed that combinations of vertical and horizontal excitations as well as longitudinal and transverse excitations generated larger responses compared with merely longitudinal excitation in case of a sliding bearing with high frictional coefficient and large velocity dependence, and that the effect of the four different frictional coefficients on the maximum and residual displacement became clear. Furthermore, it was found that shear keys at rubber buffers might affect vertical force variation at the sliding bearing.
机译：为了研究地震响应，着重研究了具有不同滑动材料的滑动轴承的摩擦特性，垂直，横向激励和摩擦系数差的影响，本文提出了由四个不同滑动轴承隔离的桥梁的振动台试验。地震响应的研究，以及滑动轴承垂直力变化的产生机理。试验结果表明，在摩擦系数高，速度依赖性大的滑动轴承的情况下，与纵向激励相比，纵向和横向激励以及纵向和横向激励的组合产生了更大的响应，并且四种不同摩擦的影响最大和剩余位移的系数变得很清楚。此外，还发现橡胶缓冲器处的剪切键可能会影响滑动轴承上的垂直力变化。

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