公路梁桥高阻尼橡胶支座优化配置研究

发布时间：2018-10-12 10:28

【摘要】：减隔震设计是较为有效的抗震措施,高阻尼橡胶支座(HDR)亦因其较好的减隔震效果在公路梁桥中广泛应用。采用非线性时程分析法对软弱场地中配置不同减隔震支座的梁式桥进行地震响应分析,研究发现高阻尼橡胶支座的减隔震效果优于相同支承能力的板式橡胶支座。然而,无论是滑动式板式支座还是滑动式高阻尼橡胶支座均会导致相应桥墩处的支座位移过大,且各项地震响应与其他各墩差异较大,荷载在各墩间分配不均。通过改变边墩处高阻尼橡胶支座的刚度及类型,分析对比了支座的各项参数对桥梁结构地震响应的影响规律。研究发现全桥采用刚度相近的高阻尼橡胶支座时能够达到全桥各墩抗震性能的均衡、减小地震作用对桥梁结构及支座的破坏。
[Abstract]:Seismic isolation design is an effective anti-seismic measure, and high damping rubber bearing (HDR) is widely used in highway beam bridges because of its good seismic isolation effect. The nonlinear time history analysis method is used to analyze the seismic response of beam bridges with different isolation bearings in weak sites. It is found that the isolation effect of high damping rubber bearings is better than that of plate rubber bearings with the same bearing capacity. However, both the sliding plate bearing and the sliding high damping rubber bearing will cause the displacement of the bearing at the corresponding pier to be too large, and the seismic response of each pier is different from that of the other piers, and the load is unevenly distributed among the piers. By changing the stiffness and type of the high damping rubber bearing at the side pier, the influence of various parameters of the bearing on the seismic response of the bridge structure is analyzed and compared. It is found that the seismic behavior of each pier of the whole bridge can be balanced when the high damping rubber bearing with similar stiffness is used in the whole bridge, and the damage to the bridge structure and bearing caused by earthquake can be reduced.
【作者单位】：西安石油大学机械工程学院;长安大学公路学院;西安市公路研究院;
【基金】：国家自然科学基金(51408042) 陕西省交通运输厅科研项目(13-21K) 陕西省教育厅专项科研计划项目(12JK0900,17JK0618)资助
【分类号】：U443.361

【相似文献】