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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 introducing the viscoelastic artificial boundary, a finite element analysis model of the plant-soil-structure interaction was established to analyze the vibration of the multi-storey plant under the action of the equipment. The model simplification and the interaction between the pile-soil system and the system The impact of comparative study. The case study shows that the pile-soil system reduces the natural frequency of the system and has an impact on the dynamic response of the structure, but there are differences in horizontal and vertical directions. Under the action of high frequency equipment, the pile-soil system has little effect on the horizontal vibration of the plant, but will cause the vertical dynamic response of the structure to enlarge. The horizontal vibration of the pile shows bending deformation, the deformation mainly concentrates in the upper part and the vertical vibration shows the overall vibration.