【摘要】 针对某铁路大跨连续梁桥,基于3种减隔震装置,提出了4种减隔震设计方案,利用非线性时程分析法对每种方案进行了计算分析。结果表明,液体粘滞阻尼器可有效改善桥梁纵向的受力和位移;双曲面球型减隔震支座能同时改善桥梁纵、横向的受力,但位移较大;液体阻尼器与双曲面减隔震支座配合使用可同时改善结构的纵、横受力,并且可控制位移;铅芯阻尼器耗能效果显著,位移基本可控,应继续开展研究。更多还原

【Abstract】 For a railway large span continuous girder bridge,basing on three types of isolation devices,we give four kinds of seismic mitigation and isolation schemes,and calculate and analyze each scheme by using nonlinear time history analysis method. The results show that the liquid viscous dampers could improve the longitudinal mechanics and displacement performances of the bridge,and the double spherical aseismic bearing could ameliorate the longitudinal and transverse mechanics behaviors of the bridge at the same time,but leads to the large displacement. If the liquid viscous dampers are used in conjunction with double spherical aseismic bearing,the longitudinal and transverse mechanics behaviors could be improved and the displacement performance could be under control. The ability of lead damper for dissipation and absorbing earthquake energy is outstanding,and the displacements could be under control,so it needs more studies.更多还原