| 设置负刚度装置的大跨长联连续梁桥地震反应分析 |
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| 引用本文： | 陆兆文,夏修身,史军,王垲,刘魏.设置负刚度装置的大跨长联连续梁桥地震反应分析[J].世界地震工程,2022,38(2):181-187. |
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| 作者姓名： | 陆兆文 夏修身 史军 王垲 刘魏 |
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| 作者单位： | 兰州交通大学 土木工程学院, 甘肃 兰州 730070 |
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| 摘 要： | 为完善大跨长联连续梁桥的减震和隔震技术，提出将负刚度装置引入某带有摩擦摆支座隔震的大跨长联连续梁桥中组成新型减震和隔震系统。基于CSIBridge软件建立全桥有限元模型，负刚度装置采用弹性多段线模拟，摩擦摆支座采用双线性恢复力模型，输入7条地震波进行了非线性时程分析，考查了新型减震和隔震系统下桥梁结构的地震反应，探究了负刚度系统对大跨长联隔震连续梁桥地震反应的影响。研究结果表明:在大跨长联隔震连续梁桥上布置负刚度装置后，梁体加速度及支座位移可被有效降低，近场地震动下的墩底内力也有明显减小。负刚度装置可有效提高大跨长联摩擦摆支座连续梁桥的抗震性能，负刚度装置也适用于大跨长联隔震连续梁桥。
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| 关 键 词： | 大跨长联连续梁桥 摩擦摆支座 负刚度装置 地震反应 |
Seismic response analysis of long span continuous girder bridge with negative stiffness device |
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| LU Zhaowen,XIA Xiushen,SHI Jun,WANG Kai,LIU Wei.Seismic response analysis of long span continuous girder bridge with negative stiffness device[J].World Information On Earthquake Engineering,2022,38(2):181-187. |
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| Authors: | LU Zhaowen XIA Xiushen SHI Jun WANG Kai LIU Wei |
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| Affiliation: | School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China |
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| Abstract: | In order to improve the seismic isolation technology of long-span continuous girder bridge，a novel seismic isolation system is proposed by introducing the negative stiffness device（NSD）into a long-span continuous bridge with friction pendulum bearings. The finite element model was established using CSIBridge software. The NSD was simulated by elastic multi segment line，and the friction pendulum bearing was bilinear hysteretic model. The seismic response of the bridge under the new seismic isolation system was investigated，and the influence of the negative stiffness system on the seismic response of long-span continuous bridge with seismic isolation was explored by inputting seven seismic waves to carry out nonlinear time history analysis. The results show that the acceleration of the beam and the displacement of the bearing can be effectively reduced when the negative stiffness device is installed on the long-span continuous beam bridge，and the internal force at the bottom of the pier under the near-field earthquake can also be significantly reduced. The new isolation system can effectively improve the seismic performance of the bridge，the NSD is also suitable for long-span isolated continuous bridge. |
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| Keywords: | long span continuous girder bridge friction pendulum bearing negative stiffness device seismic response |
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