高铁桥梁典型减隔震装置及其减隔震效能研究

Study on Typical Seismic Mitigation and Isolation Devices for High-speed Railway Bridges and Its Seismic Mitigation and Isolation Efficiency

论述了高铁桥梁进行减隔震设计的原理和必要性,介绍了国内外桥梁进行减隔震设计的标准规范和最常采用的装置以及国内在常用减隔震装置上取得的进展。对常见高铁简支梁桥缩尺模型,针对性地设计制造了摩擦摆支座和粘滞阻尼器,进行了中、低墩的振动台试验,试验数据表明其相对普通球型支座都具有良好的减隔震效能,摩擦摆支座尤其适合低矮墩结构,粘滞阻尼器尤其适用于高柔墩结构。文中还指出了摩擦摆支座剪力销结构的设计要点以及粘滞阻尼器设计中的注意事项。

Necessity and principle of seismic mitigation and isolation design for high-speed railway bridges were expounded,and the norms and standards of seismic mitigation and isolation design both in domestic and overseas industry as well as its most popular devices were introduced,and progress on commonly used seismic mitigation and isolation devices in China.Based on scaled mode of simply support beam girder bridge that commonly applied in China,a typical pendulum and viscous fluid damper were designed and shaking table tests were carried out on middle low pier separately,which illustrated that those devices had better performance than common spherical bearing in terms of seismic mitigation and isolation.In particular,pendulum was quite suitable for low-pier structure while viscous fluid damper for high-rise and flexible piers.Finally,the paper reviewed the key points for design,such as shear-keys design for pendulum and design attentions for viscous damper.