【摘要】 为研究高烈度区(设防烈度8.5度)高墩桥梁抗震措施,以位于高烈度区的某高墩桥梁为例进行分析。建立该桥所有联的线弹性计算模型,进行动力特性分析和反应谱分析。分析结果表明:支座顶面与梁底面发生了相对滑移,支座剪切变形较大,存在落梁隐患。在该桥上设计合适的顺桥向连梁装置、横向弹塑性挡块等抗震措施后,通过非线性时程分析验证其抗震效果。分析结果表明,采用的抗震措施可有效地控制墩顶位移、减小地震反应。更多还原

【Abstract】 To study the seismic resistance measures for high-rise pier bridges located in high intensity seismic region(seismic fortification intensity 8.5°),a high-rise pier continuous girder bridge in the region was cited as an example and analyzed.The linear elastic calculation models for all continuous units of the bridge were built and the analysis of the dynamic behavior and response spectrum was performed.The results of the analysis show the relative slip at the top of the bearings and at the bottom of the girder of the bridge takes place,the shear deformation of the bearings is great and the potential danger of fall of the girder exists.After the seismic resistance measures,such as the appropriate longitudinal girder link devices and the transverse elastic stopping blocks,are designed for the bridge,the effect of the measures has been verified by the nonlinear time-history analysis and the results of the analysis show that the measures can effectively control the displacement atop the piers and reduce the seismic response.更多还原