纵向碰撞下FPS隔震曲线桥地震响应分析

发布时间：2018-02-23 07:47

本文关键词： 曲线桥梁 FPS 精细化模拟建模适用范围地震响应　出处：《工程抗震与加固改造》2016年02期 　论文类型：期刊论文

【摘要】：本文结合某曲线桥工程,研究相邻联纵向碰撞对FPS隔震曲线桥地震响应的影响。文中选择桥梁设计半径和主梁跨度为参数,利用反应谱进行单段直梁法、梁格法和多段直梁法建模适用范围的探究。并根据上述结论建立考虑、不考虑碰撞的FPS曲线桥以及考虑碰撞的板式橡胶曲线桥模型,进行对比分析。结果表明,多维地震作用输入下,在跨长不变而曲率半径增大时,三种模拟方法差值逐渐减小,梁格法最优,多段直梁法误差率均在10%之内,单段直梁法存在满足精度要求的临界跨曲比。此外,碰撞可增大装有FPS支座的曲线桥中跨桥墩地震响应,而对边跨桥墩地震响应几乎无影响。建议在实际工程中,将FPS支座用于曲线桥边跨桥墩。
[Abstract]:In this paper, the influence of adjacent longitudinal collision on the seismic response of a curved bridge with FPS isolation is studied. The design radius of the bridge and the span of the main beam are selected as parameters, and the response spectrum is used to carry out the single section straight beam method. Based on the above conclusions, the model of FPS curved bridge without collision and the model of plate rubber curved bridge without collision are established and analyzed. The results show that, When the span length is invariant and the curvature radius increases, the difference between the three simulation methods decreases gradually, the beam method is optimal, and the error rate of the multi-section straight beam method is within 10%. In addition, the impact can increase the seismic response of mid-span pier of curved bridge with FPS support, but has little effect on the seismic response of side span pier. It is suggested that in practical engineering, the seismic response of side span pier is almost unaffected. The FPS support is used for curved bridge side span pier.
【作者单位】：北京建筑大学北京市城市交通基础设施建设工程技术研究中心;北京建筑大学首都世界城市顺畅交通协同创新中心;
【基金】：国家自然科学基金项目(51308027;51178042)
【分类号】：U442.55

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