建筑结构学报2024，Vol.45Issue(4)：142-154,13.DOI:10.14006/j.jzjgxb.2023.0073
近轨建筑地下室结构柱车致低频振动减振设计
Metro-induced low frequency vibration reduction design of basement structural column of near rail buildings
摘要
Abstract
In order to suppress the metro-induced low frequency vibration,the vibration reduction design of the basement structural column was presented based on the actual engineering background.Based on the vehicle-track coupling dynamics theory,a metro-induced low-frequency vibration prediction model for near-track high-rise buildings was established by considering nonlinear factors such as medium-high frequency vibration of wheel-rail caused by short-wave random irregularity,layered characteristics of soil,and artificial viscoelastic boundary.Ground vibration attenuation law test and the metro-induced basement vibration characteristic test were carried out to verify the effectiveness of the proposed vibration prediction model.The suppression effects of four vibration reduction schemes,i.e.,optimal arrangement of non-permanent columns in basement,embedded disc spring vibration isolation bearing,rubber vibration isolation bearing,and fly ash bearing in non-permanent columns,on metro-induced low-frequency vibration were studied.The results show that the optimization design of the structural column can suppress the metro-induced low-frequency vibration in different degrees.Reducing the non-permanent columns in the basement can reduce the overall structural stiffness of the basement,and therefore reduce the vibration transmitted to the high-rise building.The setting of disc spring isolation bearing mainly attenuates the vibration within the 63-125 Hz frequency section of the basement partition,and the maximum z-vibration level of the high-rise building attenuates by 7.3 dB at most.The setting of rubber vibration isolation bearing mainly attenuates the vibration of the basement partition in 40-125 Hz frequency section,and the maximum z-vibration level of the high-rise building attenuates by up to 7.6 dB.The setting of fly ash bearing mainly attenuates the vibration of the 40-125 Hz frequency section of the basement partition,and the maximum z-vibration level of the high-rise building is attenuated by 5.4 dB.For this practical project,the effect of structural column embedded rubber bearing is the best.关键词
高层建筑/结构柱/减振支座/车辆-轨道耦合动力学/低频振动/振动测试Key words
high-rise building/structural column/vibration isolating suspension/vehicle-track coupled dynamics/low-frequency vibration/vibration test分类
土木建筑引用本文复制引用
陈兆玮,彭淞,何庆烈,曾得峰,徐鸿,尹镪..近轨建筑地下室结构柱车致低频振动减振设计[J].建筑结构学报,2024,45(4):142-154,13.基金项目
国家自然科学基金项目(52008067),重庆市自然科学基金项目(CSTB2022NSCQ-MSX1193),重庆市教育委员会科学技术研究项目(KJZD-M202300701). （52008067）
