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首页> 外文会议>International Conference on Intelligent Transportation, Big Data and Smart City >Study on Mitigation Performance of Hyperboloid Spherical Seismic Isolation Bearing for Long-Span High-Speed Railway Continuous Girder Bridge
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Study on Mitigation Performance of Hyperboloid Spherical Seismic Isolation Bearing for Long-Span High-Speed Railway Continuous Girder Bridge

机译：大跨度高速铁路连续梁桥双曲线球面隔震支座的减震性能研究

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摘要

Taking the long-span high-speed railway continuous girder bridge with the main span of 128m in China as an example, a reasonable finite element analysis bridge model adopting hyperboloid spherical seismic isolation bearings is established. Using nonlinear dynamic time history analysis method, the seismic mitigation performance of the bearings on high-speed railway bridges is studied. The parameters of the seismic isolation bearing, including the friction coefficient of the sliding surface and the radius of curvature, are optimized. Numerical analysis results show that: (1) Hyperboloid spherical seismic isolation bearings provide very good mitigation effect. (2)The bending moment at the bottom of the main pier and the displacement of the pier top both decrease first and then increase with the increase of the friction coefficient. The shear force at the bottom of the pier and the pier-beam relative displacement both decrease with the increase of the friction coefficient; The internal forces of the side pier bottom, the displacement of the pier top and the relative pier-beam displacement both decrease with the increase of the friction coefficient. (3)The internal force and the top displacement of each pier have a tendency to increase slowly with the increase of the radius of curvature. The change value is not obvious, and the pier-beam relative displacement increases with the increase of the radius of curvature. The bearing parameters should be determined both on the numerical analysis results and the requirements of the bearing structure size.
机译：以中国主跨为128m的大跨度高速铁路连续梁桥为例，建立了采用双曲面球面隔震支座的合理有限元分析桥梁模型。利用非线性动态时程分析方法，研究了高速铁路桥梁轴承的减震性能。优化了隔震轴承的参数，包括滑动面的摩擦系数和曲率半径。数值分析结果表明：（1）双曲面球面隔震支座具有很好的减震效果。 （2）主墩底部的弯矩和墩顶的位移均随着摩擦系数的增大先减小后增大。墩脚底部的剪力和墩梁的相对位移均随着摩擦系数的增加而减小。侧墩底部的内力，墩顶部的位移和相对墩梁的位移都随着摩擦系数的增加而减小。 （3）每个墩的内力和顶部位移都有随曲率半径的增加而缓慢增加的趋势。变化值不明显，墩梁相对位移随着曲率半径的增加而增加。轴承参数应根据数值分析结果和轴承结构尺寸的要求确定。

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