Dynamic responses of inter-story isolation structure under vertical earthquake action

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Mar.2024, Vol.47 No.3: 373-378

DOI: 10.3969/j.issn.1003-5060.2024.03.014

Authors

HU Yue $ ^{1} $, WANG Quan $ ^{1,2} $, TANG Tao $ ^{3} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Anhui Engineering Technology Research Center for Civil Engineering Disaster Prevention and Mitigation, Hefei 230009, China; 3. Tongcheng Planning and Architectural Design Institute of Anhui Province, Anqing 231400, China)

Abstract and Keywords

Abstract: Aiming at the influence of the position change of the isolation layer on the vertical dynamic responses of high-rise structure under vertical earthquake action, the vertical dynamic responses of the five kinds of inter-story isolation structures under three kinds of vertical seismic waves are studied in this paper. Taking the Benchmark twenty-story steel structure model of the international platform as the standard model, the finite element numerical models of isolation structures of the first, third, fifth, seventh and ninth stories are established by ANSYS software. Then, the vertical dynamic responses of the five kinds of inter-story isolation structures under vertical ElCentro wave, vertical Taft wave and vertical Tianjin wave, such as vertical story displacement, story displacement angle, vertical story acceleration and axial force of the base, are compared and analyzed. The results show that under the action of vertical earthquake, the control effect on vertical story displacement and story displacement angle is poor, and even they will increase, and the control effect on the axial force of the base is small; the vertical story acceleration and the axial force of the base increase gradually with the rise of the isolation layer, but when the isolation layer is located in the ninth story, the vertical story acceleration and the axial force of the base decrease to some extent compared with those with the isolation layer located in the seventh story. The research results of this paper can be used in structural seismic design of high-rise buildings considering vertical earthquake action.

Keywords: inter-story isolation structure; Benchmark model; vertical earthquake action; vertical dynamic response

作者信息

胡岳 $ ^{1} $，汪权 $ ^{1,2} $，汤涛 $ ^{3} $

（1. 合肥工业大学土木与水利工程学院，安徽合肥 230009；2. 土木工程防灾减灾安徽省工程技术研究中心，安徽合肥 230009；3. 安徽省桐城市规划建筑设计院，安徽安庆 231400）

摘要和关键词

摘要: 文章针对竖向地震作用下高层结构隔震层位置变化对结构竖向动力反应的影响问题, 研究5种层间隔震结构分别在3种竖向地震作用下的竖向动力反应。以国际平台的20层Benchmark钢结构模型为基准模型, 利用ANSYS软件建立隔振层分别位于第1层、第3层、第5层、第7层和第9层的层间隔震结构有限元数值模型, 对比分析5种层间隔震结构分别在竖向ElCentro波、竖向Taft波、竖向天津波作用下的楼层竖向位移、楼层位移角、楼层竖向加速度和基底轴力等竖向动力反应。结果表明: 在竖向地震作用下, 楼层竖向位移和楼层位移角控制效果较差, 甚至会出现增大的现象, 基底轴力具有较小的控制效果; 随着隔震层位置的升高, 楼层竖向加速度和基底轴力均逐渐增大, 但当隔震层位于第9层时, 楼层竖向加速度和基底轴力相较于隔震层位于第7层时有一定的减小。该文研究成果可用于考虑竖向地震作用的高层结构抗震设计。

关键词: 层间隔震结构；Benchmark模型；竖向地震作用；竖向动力反应

Funding

国家自然科学基金资助项目（51878234）

合肥工业大学学报(自然科学版)

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