摘要
地下结构在地震作用下的动力响应是影响其安全稳定的重要因素。为了探究阻尼效应以及地基反力对地下结构动力响应的影响规律,基于Winkler局部弹性地基模型,建立了阻尼作用下Euler-Bernoulli梁的强迫振动方程。利用分离变量法求解了地下结构与地基之间的相互作用规律及动力响应的显式解析解,并得到了结构的自振频率与振型。考虑地基基床系数,土体阻尼系数(或阻尼比),地震加速度幅值以及地震角频率等因素对结构动力响应的影响。研究表明,阻尼系数(或阻尼比)对结构的动力响应以及土与结构之间的相互作用影响显著。
The dynamical response under the action of earthquake is crucial for the safety of underground structures. To study the effect of damping and foundation reaction on the dynamical response of underground structure, the Winkler local elastic foundation model is used to establish the forced vibration equation for the Euler-Bernoulli beam. The explicit analytical solution to the governing equation as well as the free frequency and vibration modes are obtained by using the method of variable separation. The effect of foundation stiffness, damping ratio, and the acceleration amplitude as well as angular frequency of driving force on the dynamical response of underground structure is considered. The results show that the damping ration is significant for the dynamical response of underground structure.
作者
刘翔
沈艳兵
胡志华
刘冬雪
刘立营
LIU Xiang;SHENG Yanbing;HU Zhihua;LIU Dongxue;LIU Liying(China Construction Senenth Engineering Division Co.,Ltd.,Beijing 100162,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期828-832,共5页
Building Structure
作者简介
第一作者:刘翔,硕士,高级工程师,主要从事科技管理、工程施工技术研究,Email:746291926@qq.com;通信作者:刘冬雪,学士,工程师,主要从事工程施工技术研究,Email:541879129@qq.com。
