摘要
通过引入黏弹性人工边界,建立了桩-土-结构相互作用的厂房整体有限元分析模型,对设备作用下的多层厂房振动进行较为全面的分析,并就模型简化及桩-土体系对系统的影响进行对比研究。实例计算表明:桩-土体系的参与降低了系统自振频率,并对结构的动力响应产生了一定的影响,但在水平与竖向两个方向上存在差异。高频设备荷载作用下,桩-土体系的参与对厂房的水平振动影响不大,而会造成结构竖向动力响应放大。桩体在水平振动表现为弯曲变形,变形主要集中在上部,在竖向振动中则表现为整体振动。
By considering viscous-spring boundary,the holistic pile-soil-structure dynamic finite element model of multi-story factory buildings was built,then the vibration of factory buildings were studied more entirely,model simplifying methods and the effect of pile-soil system were analyzed and compared.Some things were get from computed examples,the pile-soil system can reduce the natural frequencies of structures and have effects on dynamic response of structures,but there was some differences between horizontal and vertical vibration.Under the forces with high frequency,pile-soil system has little effect on the horizontal vibration,but it can enlarge the vertical vibration,the flexural distortion of piles happened near top in the horizontal vibration,and the whole piles participate in vertical vibration.
出处
《工业建筑》
CSCD
北大核心
2008年第z1期438-442,共5页
Industrial Construction
关键词
桩-土-结构相互作用
多层厂房振动
黏弹性边界
pile-soil-structure dynamic interaction factory building vibration viscous-spring boundary
