摘要
为了研究摩擦摆隔震高铁桥梁在罕遇地震与极罕遇地震作用下的地震反应,以某隔震高铁桥梁为研究对象,采用SAP2000有限元软件建立摩擦摆隔震与非隔震高铁桥梁的梁体-支座-桥墩的一体化非线性分析模型,输入3条天然波采用非线性动力时程分析法分析隔震与非隔震高铁桥梁在罕遇和极罕遇地震作用下的地震响应。结果表明:摩擦摆隔震支座能有效延长桥梁的自振周期;在罕遇地震和极罕遇地震时,摩擦摆隔震支座均能显著降低桥梁的地震响应,耗散地震的能量,进而显著降低桥墩发生弯曲破坏和剪切破坏的可能;在极罕遇地震时,摩擦摆隔震支座位移均已经超限,支座均发生不同程度的剪切破坏,为了保证桥梁在罕遇地震下的安全性,有必要在桥梁的隔震层安装限位装置。
In order to study the seismic response of high-speed railway bridges isolated by friction pendulum under rare earthquake and extremely rare earthquake,taking an isolated high-speed railway bridge as the research object,the integrated nonlinear analysis model of the beam-support-bridge pier of the friction pendulum isolation and non-isolation high-speed railway bridge is established by SAP2000 finite element software.Three natural waves are input,and the nonlinear dynamic time history analysis method is used to analyze the seismic response of the isolated and non-isolated high-speed railway bridges under the rare and extremely rare earthquake.The results show that the friction pendulum isolation can effectively prolong the natural vibration period of the bridge;in the rare earthquake and extremely rare earthquake,the friction pendulum isolation can significantly reduce the seismic response of the bridge and dissipate the energy of the earthquake.Furthermore,the possibility of bending failure and shear failure of the pier is significantly reduced;in extremely rare earthquake,the displacement of the friction pendulum isolation bearing has exceeded the limit,and the bearing has different degrees of damage,it is necessary to be in the isolation layer of the bridge.Install the limit device.
作者
邓细鹏
赵桂峰
马玉宏
石岩
Deng Xi-peng;Zhao Gui-feng;Ma Yu-hong;Shi Yan(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;Earthquake Engineering Research&Test Center,Guangzhou University,Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology,Key Laboratory of Earthquake Resistance,Earthquake Mitigation and Structural Safety,Ministry of Education,Guangzhou 510405,China)
出处
《工程抗震与加固改造》
北大核心
2020年第1期97-105,共9页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51678173、51578170、51878196)
长江学者和创新团队发展计划项目(IRT13057)
广东省自然科学基金项目(2017A030313298)
广州市科技计划项目(201707010295)资助。
关键词
摩擦摆支座
高铁桥梁
有限元模型
地震响应
罕遇地震
极罕遇地震
friction pendulum
high-speed rail bridge
finite element model
seismic response
rare earthquake
extremely rare earthquake
作者简介
邓细鹏(1994-),男,硕士研究生,主要从事结构减隔震研究.E-mail:991557909@qq.com。
