考虑散料与结构相互作用的钢筒仓抗震性能:研究进展与自振特性分析（英文）  

Seismic behavior of steel silos considering granular material-structure interaction:research advances and natural vibration property analysis

作　　者：张攀[1] 赵阳[1] 

机构地区：[1]浙江大学空间结构研究中心,浙江杭州310058

出　　处：《空间结构》2014年第3期88-96,共9页Spatial Structures

基　　金：National Natural Science Foundation of China(51378459)

摘　　要：首先回顾了筒仓抗震性能的研究进展,主要从有效质量系数和散料与筒仓壁动力相互作用两方面进行阐述.同时,基于Silvestri等人提出的理论模型,建立了合理的三维钢筒仓数值模型来模拟动力激励下散料与结构的相互作用效应.本模型的主要特点是将仓内散料分成内、外两部分:内部的每层散料重力完全由其下一层散料承担,而外部散料重力则完全通过摩擦力由仓壁承担.筒仓壁与外部散料之间的几何协调通过接触对实现,内部散料与外部散料间的协调则通过接触面处的节点径向自由度耦合实现.利用该数值模型进行了钢筒仓自振特性的参数分析,讨论了散料质量、弹性模量以及接触单元初始接触刚度等因素对自振特性的影响.A review of research advances on seismic behavior of silos is presented in this paper, with main focus on the development of effective mass coefficient method and the effect of granular material-structure interaction. A new three dimensional model for the analysis of squat steel silos is then developed based on the theoretical work of Silvestri et al, in order to investigate the granular material-structure interaction effect under dynamic excitation. The most remarkable characteristic of this model is to divide the granular contents into two portions： the central portion （grain completely leaning against the layers below） and the external portion （grain completely sustained by the wall）. The geometric compatibility between the external portion of the granular materials and the silo wall is enforced by means of special contact pairs, while between the exter- nal portion and the central portion by means of coupling the radial DOFs. By using the proposed numerical model, a parametric study is carried out on the natural vibration property of steel silos, and the effects of the mass of the contents, the elastic modulus of the contents and the initial contact stiffness of the contact pairs are discussed.

关 键 词：钢筒仓 地震响应 散料与结构相互作用 数值模型 自振特性 

分 类 号：O629.711[理学—有机化学]