摘要
以城市轨道交通高架桥钢弹簧浮置板轨道为研究对象,通过数值模拟的方法分析钢弹簧浮置板对行车安全性和桥梁振动特性的影响。在此基础上分析研究列车运行速度、浮置板厚度、钢弹簧刚度、钢弹簧阻尼、剪力铰形式等参数对桥梁结构动力性能的影响规律。结果表明:钢弹簧浮置板具有良好的减振效果,且对行车安全性指标的影响较小,有较大的安全余量;各项参数对行车安全性的影响均较小;列车运行速度对钢弹簧浮置板减振效果影响较大,但是具有随机性;浮置板厚度由0.24 m增至0.39 m时,减振效果可增加3.21 dB;钢弹簧刚度从5.7 kN/mm增至8.9 kN/mm时,其减振量降低0.33 dB;钢弹簧阻尼对减振效果影响相对较小;剪力铰的存在可以提高行车安全性和减振效果,但是不同剪力铰形式对桥梁振动响应和减振效果的影响较小。
Taking the steel-spring floating slab track on viaducts of urban rail transit as the research object,the influence of the steel-spring floating slab on operation safety and bridge vibration characteristics is analyzed by numerical simulation.On this basis,the influence law of train speed,floating slab thickness,steel-spring stiffness,steel-spring damping and shear hinge form on the dynamic performance of the viaduct structure is analyzed.The results show that the steel spring floating slab has a good vibration reduction effect,little impact on the running safety index,and has a large margin of safety.Its parameters have little impact on running safety.The train speed has a great impact on the vibration reduction effect of the steel spring floating slab.When the thickness of floating slab increases from 0.24 m to 0.39 m,the vibration reduction effect can increase by 3.21 dB;When the stiffness of steel-spring increases from 5.7 kN/mm to 8.9 kN/mm,its vibration reduction effect decreases by 0.33 dB;The damping effect of steel-spring is relatively small;The existence of shear hinge can improve the running safety and vibration reduction effect,but different forms of shear hinge have little influence on the vibration response and vibration reduction effect of the bridge.
作者
李铸珅
张媛
闫宇智
战家旺
LI Zhushen;ZHANG Yuan;YAN Yuzhi;ZHAN Jiawang(Guoneng Shuohuang Railway Development Co.,Ltd.,Suning 062350,Hebei,China;Zhejiang Province Institute of Architectural Design and Research,Hangzhou 310006,China;Beijing Jiuzhouyigui Environmental Technology Co.,Ltd.,Beijing 100071,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《噪声与振动控制》
CSCD
北大核心
2023年第6期184-189,220,共7页
Noise and Vibration Control
