上海某中学三维隔震设计与抗震分析
引用文献：
张坚 刘文光 李梦露 许浩 陈睦锋. 上海某中学三维隔震设计与抗震分析[J]. 建筑结构，2023，48（01）：59-64，134.
ZHANG Jian LIU Wenguang LI Menglu XU Hao CHEN Mufeng. Three-dimensional seismic isolation design and seismic analysis of a middle school in Shanghai[J]. Building Structure，2023,48（01）：59-64，134.
摘要：上海某中学校史馆为三层钢结构，其地下一层为篮球场，层高9.6m,结构跨度34.8m,需考虑竖向地震作用下的结构安全性和振动舒适度。介绍了校史馆所采用的三维隔震技术方案及其水平、竖向响应控制效果等关键技术问题。在篮球场顶部与上部结构之间设置隔震层，共布置16套三维隔震支座，结构水平隔震周期2.679s,竖向隔震周期1.233s。设防烈度地震作用下X、Y向的水平减震系数平均值分别为0.36、0.33,罕遇地震作用下结构最大层间位移角为1/244,结构仍处于弹性状态。三向地震作用下，上部结构的竖向加速度减震率可达到35.8%,罕遇地震下竖向支座的剪应变均小于250%限值。通过三维隔震设计可显著减小上部结构的地震响应，实现结构的性能化设计。
关键词：钢结构；大跨结构；三维隔震；竖向地震；性能化设计；
基金：国家自然科学基金(52078287)；国家自然科学基金(52108461)。
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[4] 王涛，李吉超，王飞.针对核电厂三维隔震的厚层橡胶支座力学性能研究[J].核动力工程，2015,36(5):37-40.
[5] 孟庆利，林德全，张敏政.三维隔震系统振动台试验研究[J].地震工程与工程振动，2007,27(3):116-120.
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[7] SUHARA J,MATSUMOTO R,OGURI S,et al.Research on 3-D base isolation system applied to new power reactor 3-D seismic isolation device with rolling seal type air spring:Pt.2[C]//Proceedings of the International Conference on Structural Mechanics in Reactor Technology.Beijing,2005.
[8] 薛素铎，常海林，李雄彦，等.抗拔型三维隔震支座力学性能研究[J].建筑结构，2022,52(5):81-87.
[9] 李雄彦，梁栓柱，薛素铎，等.碟簧-叠层橡胶三维复合隔震支座力学性能试验研究[J].建筑结构，2021,51(8):14-20,104.
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Three-dimensional seismic isolation design and seismic analysis of a middle school in Shanghai
Abstract: The history hall of a middle school in Shanghai is a three-story steel structure. The first-floor underground is a basketball stadium with a height of 9.6 m and the structural span is 34.8 m. The structural safety and vibration comfort subjected to the vertical earthquake should be considered. The three-dimensional seismic isolation technology scheme adopted for the history hall and its horizontal and vertical response control effects and other key technical issues were introduced. A seismic isolation layer was set between the top of the basketball stadium and the superstructure, consisting of 16 three-dimensional isolators. The horizontal isolation period of the structure is 2.679 s and the vertical isolation period is 1.233 s. Under the seismic action of the fortification intensity, the average values of the horizontal damping coefficients in X and Y directions are 0.36 and 0.33 respectively, and the maximum interlayer displacement angle of the structure is 1/244 under the action of rare earthquakes, and the structure is still in an elastic state. The vertical isolation effect of the superstructure can reach 35.8% calculated by the acceleration under three-dimensional earthquake. And the shear strain of the vertical bearing is less than 250% subjected to the rare earthquake. Three-dimensional seismic isolation design can significantly reduce the seismic response of the superstructure and realize performance-based design of the structure.
Keywords: steel structure; large-span structure; there-dimensional isolation; vertical earthquake; performance-based design
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