三维地震作用下某摩擦摆隔震单层球面网壳振动台试验研究
引用文献：
庄鹏 李一博 韩淼. 三维地震作用下某摩擦摆隔震单层球面网壳振动台试验研究[J]. 建筑结构，2023，48（03）：1-9，51.
ZHUANG Peng LI Yibo HAN Miao. Shaking table tests of a single-layer spherical lattice shell with friction pendulum bearings under three-dimensional ground motions[J]. Building Structure，2023,48（03）：1-9，51.
摘要：为研究三维地震作用下某摩擦摆(friction pendulum bearing, FPB)隔震网壳结构的抗震性能，以某跨度为30m的单层球面网壳结构作为原型结构，设计加工了1/10缩尺模型及其FPB系统。采用了5条具有不同特征的三向地震动记录作为动力输入，开展了隔震与非隔震网壳结构模型的振动台试验研究，对使用FPB前后网壳结构模型的自振特性和地震响应进行了对比分析。试验研究结果表明：隔震结构模型的基本自振频率较非隔震结构模型降低了80%;在施加地震波时，可清晰地观察到在FPB启动后，安装于隔震层之上的网壳屋盖呈现整体刚体往复平动；与非隔震结构相比，隔震网壳结构模型的水平双向地震响应有大幅度降低；使用FPB对竖向地震响应也具有一定的控制效果；经过润滑的FPB可提供优良的复位能力。
关键词：振动台试验；单层球面网壳；隔震；摩擦摆支座；三维地震作用；
基金：北京市自然科学基金资助项目(8182016)；北京建筑大学大型多功能振动台阵实验室开放研究专项基金(2022MFSTL12)。
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[9] 聂桂波，戴君武，张辰啸，等.芦山地震中大跨空间结构主要破坏模式及数值分析[J].土木工程学报，2015,48(4):1-6.
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[11] 丁洁民，陈长嘉，吴宏磊.隔震技术在大跨度复杂建筑中的应用现状及关键问题 [J].建筑结构学报，2019,40(11):1-10.
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[13] 孔德文，范峰，支旭东.三维地震作用下应用FPB单层球面网壳抗震性能[J].哈尔滨工业大学学报，2016,48(6):10-16.
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[16] ERÖZ M,DESROCHES R.Bridge seismic response as a function of the Friction Pendulum System (FPS)modeling assumptions[J].Engineering Structures,2008,30(11):3204-3212.
[17] DOLCE M,CARDONE D,CROATTO F.Frictional behavior of steel-PTFE interfaces for seismic isolation[J].Bulletin of Earthquake Engineering,2005,3(1):75-99.
[18] LOMIENTO G,BONESSIO N,BENZONI G.Friction model for sliding bearings under seismic excitation[J].Journal of Earthquake Engineering,2013,17(8):1162-1191.
Shaking table tests of a single-layer spherical lattice shell with friction pendulum bearings under three-dimensional ground motions
Abstract: To study the seismic behavior of lattice shell structures with friction pendulum bearings(FPBs) under three-dimensional ground motions, a 1/10 scaled single-layer spherical lattice shell structure model and its FPB system were designed and fabricated based on a prototype single-layer lattice shell with a span of 30m. Shaking table tests of the isolated and non-isolated structural models were carried out considering five tri-axial ground motion records. The natural vibration characteristics and seismic responses of the structural model with and without the FPB system were compared and analyzed. The experimental results reveal that the fundamental natural frequency of the isolated structural model is reduced by 80% compared with the non-isolated structural model. When applying the seismic excitations, it is observed that the lattice shell roof mounted on the isolation layer exhibits a rigid-body mutual movement after the FPBs were activated. The horizontal seismic responses of the isolated structural model are significantly less than those of the non-isolated structural model, and the vertical seismic response can be controlled using the FPBs. The lubricated FPB system can provide a satisfactory re-centering capacity.
Keywords: shaking table test; single-layer spherical lattice shell; seismic isolation; friction pendulum bearing; three-dimensional ground motion
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