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(1 北京建筑大學(xué)土木與交通工程學(xué)院, 北京 100044; 2 北京建筑大學(xué)大型多功能振動(dòng)臺(tái)陣實(shí)驗(yàn)室,北京 100044; 3 北京建筑大學(xué)工程結(jié)構(gòu)與新材料北京高等學(xué)校工程研究中心, 北京 100044)

摘要: 為研究三維地震作用下某摩擦擺( friction pendulum bearing,FPB)隔震網(wǎng)殼結(jié)構(gòu)的抗震性能,以某跨度為30m 的單層球面網(wǎng)殼結(jié)構(gòu)作為原型結(jié)構(gòu),設(shè)計(jì)加工了 1 / 10 縮尺模型及其 FPB 系統(tǒng). 采用了 5 條具有不同特征的三向地震動(dòng)記錄作為動(dòng)力輸入,開展了隔震與非隔震網(wǎng)殼結(jié)構(gòu)模型的振動(dòng)臺(tái)試驗(yàn)研究,對(duì)使用 FPB 前后網(wǎng)殼結(jié)構(gòu)模型的自振特性和地震響應(yīng)進(jìn)行了對(duì)比分析. 試驗(yàn)研究結(jié)果表明:隔震結(jié)構(gòu)模型的基本自振頻率較非隔震結(jié)構(gòu)模型降低了 80%;在施加地震波時(shí),可清晰地觀察到在 FPB 啟動(dòng)后,安裝于隔震層之上的網(wǎng)殼屋蓋呈現(xiàn)整體剛體往復(fù)平動(dòng);與非隔震結(jié)構(gòu)相比,隔震網(wǎng)殼結(jié)構(gòu)模型的水平雙向地震響應(yīng)有大幅度降低;使用 FPB 對(duì)豎向地震響應(yīng)也具有一定的控制效果;經(jīng)過潤滑的 FPB 可提供優(yōu)良的復(fù)位能力.

關(guān)鍵詞: 振動(dòng)臺(tái)試驗(yàn); 單層球面網(wǎng)殼; 隔震; 摩擦擺支座; 三維地震作用

中圖分類號(hào):TU393. 3 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)03-0001-09

DOI:10. 19701 / j. jzjg. ZJ210094

Shaking table tests of a single-layer spherical lattice shell with friction pendulum bearings under three-dimensional ground motions

ZHUANG Peng1, 2, 3, LI Yibo1, HAN Miao1, 2, 3

(1 School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing100044, China; 2 Multi-Functional Shaking Tables Laboratory, Beijing University of Civil Engineering and Architecture,Beijing 100044, China; 3 Beijing Higher Institution Engineering Research Center of Civil Engineering Structure andRenewable Material, Beijing University of Civil Engineering and Architecture, Beijing 100044, China)

Abstract: To study the seismic behavior of lattice shell structures with friction pendulum bearings ( FPBs) under threedimensional ground motions, a 1/ 10 scaled single-layer spherical lattice shell structure model and its FPB system weredesigned and fabricated based on a prototype single-layer lattice shell with a span of 30m. Shaking table tests of the isolatedand non-isolated structural models were carried out considering five tri-axial ground motion records. The natural vibrationcharacteristics 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 roofmounted on the isolation layer exhibits a rigid-body mutual movement after the FPBs were activated. The horizontal seismicresponses of the isolated structural model are significantly less than those of the non-isolated structural model, and the verticalseismic 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; threedimensional ground motion

∗北京市自然科學(xué)基金資助項(xiàng)目(8182016),北京建筑大學(xué)大型多功能振動(dòng)臺(tái)陣實(shí)驗(yàn)室開放研究專項(xiàng)基金(2022MFSTL12).

第一作者:莊鵬,博士,副教授,主要從事大跨空間結(jié)構(gòu)抗震與減隔震研究,Email: harryzhpeng@ 126. com.

[引用本文] 莊鵬,李一博,韓淼. 三維地震作用下某摩擦擺隔震單層球面網(wǎng)殼振動(dòng)臺(tái)試驗(yàn)研究[ J]. 建筑結(jié)構(gòu),2023,53(3):1-9,51. ZHUANG Peng,LI Yibo,HAN Miao. Shaking table tests of a single-layer spherical lattice shell withfriction pendulum bearings under three-dimensional ground motions[J]. Building Structure,2023,53(3):1-9,51.