浅埋地铁车站结构变阻尼比反应谱影响因素  

Influencing Factors of Variable Damping Ratio Response Spectrum of Shallow Buried Subway Station Structure

作　　者：张亚辉 郭唯伟[2] 徐强 樊浩博 ZHANG Yahui;GUO Weiwei;XU Qiang;FAN Haobo(Hebei Urban and Rural Construction School,Shijiazhuang 050021,China;Hebei Electric Power Design and Research Institute,Shijiazhuang 050031,China;Shijiazhuang Railway University Road and Railway Engineering Safety Guarantee Provincial and Ministry of Education Joint Construction Laboratory,Shijiazhuang 050000,China;Shijiazhuang Tiedao Unversity,Shijiazhuang 050000,China)

机构地区：[1]河北城乡建设学校,石家庄050043 [2]河北省电力勘测设计研究院,石家庄050031 [3]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,石家庄050000 [4]石家庄铁道大学土木工程学院,石家庄050000

出　　处：《华北地震科学》2023年第4期72-78,共7页North China Earthquake Sciences

基　　金：国家自然科学基金青年基金资助项目(52108378);河北省自然科学基金资助项目(E2020210068);青年人才托举工程(2021QNRC001)。

摘　　要：以单层双跨结构为研究对象,建立变阻尼比条件下的平均化反应谱,并对其进行回归分析,对该平均反应谱即水平地震影响系数曲线进行了特性分析。结果显示,该平均化反应谱与地铁车站结构所在的围岩性质、地震波频率特性、场地设防烈度以及车站埋深有关:在不同设防烈度条件下的变阻尼比相对反应谱形状是不同的,而且设防烈度越高,反应谱峰值越低,图形形状越矮;在围岩参数发生改变时,泊松比对反应谱的变化影响最大,峰值影响与反应谱曲线形状差异性最大;随着埋深的增加,各类场地土的影响系数峰值逐渐减小;地震波频谱特性引起的结构动力反应得到的地震影响系数随地震波傅里叶谱的峰值增大而增大。Taking single-layer double-span structure as the research object,the average response spectrum under variable damping ratio is established,and its regression analysis is carried out.The characteristics of the average response spectrum,that is,the horizontal seismic influence coefficient curve,are analyzed.The analysis shows that the average response spectrum is related to the surrounding rock properties,the frequency characteristics of seismic waves,the intensity of site forcement and the depth of the station.The shape of the relative response spectrum of variable damping ratio is different under different fortification intensities.The higher the fortification intensities,the lower the peak value of the response spectrum and the shorter the shape of the graph.When the surrounding rock parameters are changed,Poisson's ratio has the greatest influence on the change of the response spectrum,and the difference between the peak value and the shape of the response spectrum curve is the greatest.With the increase of burial depth,the peak value of influence coefficient of all kinds of site soil gradually decreases.The seismic influence coefficient obtained from the structural dynamic response caused by the spectral characteristics of seismic waves increases with the peak value of the Fourier spectrum of seismic waves.

关 键 词：围岩 地震 反应谱 设防烈度 地铁车站 

分 类 号：P315.92[天文地球—地震学] U452.21[天文地球—固体地球物理学]