Shaking table test of geotechnical seismic isolation system based on glass bead-sand cushions

被引：0
|
作者：
Jing L. [1 ,2 ,3 ]
Yin Z. [1 ,2 ]
Sun H. [4 ]
Dong R. [1 ,2 ]
Xu K. [1 ,2 ]
Cheng X. [5 ]
机构：
[1] Institute of Engineering Mechanics, China Earthquake Administration, Harbin, 150080, Heilongjiang
[2] Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Harbin, 150080, Heilongjiang
[3] Institute of Disaster Prevention, Langfang, 065201, Hebei
[4] Zhuhai Engineering Investigation Institute of Guangdong Province, Zhuhai, 519000, Guangdong
[5] School of Civil and Architectural Engineering, East China University of Technology, Nanchang, 330013, Jiangxi
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2020年 / 39卷 / 07期
关键词：
Geotechnical seismic isolation; Glass bead-sand cushions; Laminated shear box; Masonry structure; Shaking table test; Soil mechanics;
D O I：
10.13722/j.cnki.jrme.2019.1138
中图分类号：
学科分类号：
摘要：
In this paper, a geotechnical seismic isolation system(GSI-GBSC) based on glass bead-sand cushions is proposed to protect structures against the destroying effects of earthquakes, which is to backfill the glass bead-sand cushion material between the structural foundation and the foundation soil for isolation. A large-scale shaking table model test which considers the field was carried out through the single-layer masonry structure model with and without isolation system. The scale ratio of the single-layer masonry structure model was 1/4. The north-south component of the El-Centro wave recorded in 1940 was selected as the input wave, and the peak input acceleration(PIA) was adjusted to 0.1 g, 0.2 g and 0.4 g respectively. The test results show that the isolation effect of GSI-GBSC system is not significant enough when the minor earthquake occurs but the isolation effect strengthens with enhancing the earthquake intensity. When PIA is 0.4 g, the GSI-GBSC system decreases the roof acceleration and the inter-story drift of the structure by 50% and 47.5%, respectively, which means the GSI-GBSC system can significantly reduce the earthquake response of the superstructure and achieve seismic isolation. © 2020, Science Press. All right reserved.
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页码：1458 / 1467
页数：9
相关论文
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