DYNAMIC CHARACTERISTICS STUDY OF ADDING STORY WITH DIFFERENT ISOLATING SYSTEMS OF FOUNDATION

QIAN Xiaoxu; HAN Xiaojian; HONG Baoning; PENG Yang

doi:10.13204/j.gyjzG19110801

Volume 50 Issue 11

Mar. 2021

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2020 > 50(11): 184-189,167

QIAN Xiaoxu, HAN Xiaojian, HONG Baoning, PENG Yang. DYNAMIC CHARACTERISTICS STUDY OF ADDING STORY WITH DIFFERENT ISOLATING SYSTEMS OF FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(11): 184-189,167. doi: 10.13204/j.gyjzG19110801

Citation:

QIAN Xiaoxu, HAN Xiaojian, HONG Baoning, PENG Yang. DYNAMIC CHARACTERISTICS STUDY OF ADDING STORY WITH DIFFERENT ISOLATING SYSTEMS OF FOUNDATION[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(11): 184-189,167. doi: 10.13204/j.gyjzG19110801

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DYNAMIC CHARACTERISTICS STUDY OF ADDING STORY WITH DIFFERENT ISOLATING SYSTEMS OF FOUNDATION

doi: 10.13204/j.gyjzG19110801

1. School of Urban and Civil Engineering Sciences, Jinling College of Nanjing University, Nanjing 210089, China;
2. College of Civil Engineering, Nanjing Tech University, Nanjing 210009, China;
3. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
4. Institute of Architecture Design and Planning Co., Ltd., Nanjing University, Nanjing 210009, China

Received Date: 2020-04-23
Available Online: 2021-03-31

Abstract

Abstract

Based on the method of dimension analysis, the four-floor steel frame structure was designed as existing building(natural period 0.1~0.4 s) and the two-floor steel frame structure was selected as additional story to satisfy simulation ratio. According to the shaking table tests,the seismic behavior of extension-story structure, the isolation effectiveness and mechanism of isolation layer were compared and studied for the fixed base model, base sliding-isolation model, combined isolation model. The dynamic characteristic of prototypes were extrapolated by using finite element software. The results showed that:1)with no base isolation, the added layer would have dramatic increase of the dynamic response due to whiplash effect. 2)After adopting the isolation technology, the dynamic response of superstructures were greatly reduced. The decreasing amplitude ratio and economy of the base sliding isolation were better than the combined isolating system of foundation. Compared with the base sliding isolation, the inter-layer displacement amplitude of combined isolation had been reduced more drastically. 3)The original 4-story structure which the natural vibration period was 0.204 s with 2 added layers, the seismic response of structure was reduced and the seismic behavior of structure was improved after adopting the base isolation.
- added-story structure,
- shaking table test,
- base sliding isolation,
- combined isolating system of foundation,
- finite element analysis

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References

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