【摘要】 非规则连续梁桥墩高差异较大,地震反应复杂,传统的单固定墩抗震支座布置会使各墩之间地震力分配不合理。基于某两联三跨连续梁桥,探讨了水平地震力在非规则连续梁桥高矮墩之间的分配问题。采用非线性时程分析方法,分析了多种参数下的高阻尼橡胶支座与四氟滑板支座及板式橡胶支座与四氟滑板支座组合下各墩地震力的分配规律,并与传统单固定墩的地震力分配进行了比较。结果表明:高阻尼橡胶支座与滑板支座组合可使水平地震力在非规则连续梁桥的各墩之间得到合理分配。非规则连续梁桥可通过减隔震支座的合理布置获得较好抗震性能。更多还原

【Abstract】 The piers of irregular continuous girder bridge have large height difference each other and complex earthquake response. The earthquake force distribution of traditional single fixed pier aseismatic bearing is irrational.Based on a three-span and two-connection continuous girder bridge. This paper proposes a discussion on the problem of horizontal earthquake force distribution in high and low piers in continuous girder bridges. Comparing with earthquake force distribution in traditional single fixed pier,nonlinear time-history method was used in this paper to analysis the distribution law of earthquake force in piers which have combination of high damping rubber bearings and teflon slide type bearings and combination of laminated rubber bearings and teflon slide type bearings. The analysis results show that the combination of high damping rubber bearings and teflon slide type bearings can make earthquake force distributed rationally among piers in irregular continuous girder bridges. Reasonable arrangement of integrated isolation bearings can promote irregular continuous girder bridge’s seismic behavior significantly.更多还原