高墩自复位隔震机理

发布时间：2018-06-27 02:32

本文选题：高墩 + 桩基础　；参考：《中南大学学报(自然科学版)》2015年07期

【摘要】：为了探讨桩基础高墩自复位隔震机理,用2个弹簧模拟桥墩的提离摇摆,考虑限位钢筋的影响,基于某铁路高墩桥梁,采用非线性时程分析方法,输入3条强震记录,讨论高墩摇摆反应随提离弹簧刚度、基础宽度及参数λ变化的规律。研究结果表明:提离弹簧刚度越小桥墩的摇摆振动越剧烈、摇摆反应越大,墩顶位移随λ的增大而减小、有明显的线性关系,墩底弯矩随λ的变化相对复杂。通过基础宽度、λ及墩-承台的接触刚度调整均可以实现对桥墩摇摆反应的控制。
[Abstract]:In order to study the mechanism of self-reset isolation of high pier of pile foundation, two springs are used to simulate the lift and swing of pier, and the influence of limited steel bar is considered. Based on the nonlinear time-history analysis method, three strong earthquake records are inputted to a railway bridge with high pier. The variation of rocking response of high pier with stiffness of lift spring, width of foundation and parameter 位 is discussed. The results show that the greater the stiffness of lifting spring, the more violent the rocking vibration of pier is, and the greater the rocking response is, and the displacement of pier top decreases with the increase of 位, which has obvious linear relationship, and the variation of bending moment of pier bottom with 位 is relatively complex. Through the adjustment of foundation width, 位 and the contact stiffness of pier-cap, the rocking response of bridge pier can be controlled.
【作者单位】：兰州交通大学土木工程学院;同济大学土木工程学院;
【基金】：国家自然科学基金资助项目(51368033) 长江学者和创新团队发展计划项目(IRT1139) 国家重点基础研究发展规划(973计划)项目(2013CB036302)~~
【分类号】：U442.55

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