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Frontiers of Structural and Civil Engineering

ISSN 2095-2430

ISSN 2095-2449(Online)

CN 10-1023/X

邮发代号 80-968

2019 Impact Factor: 1.68

Frontiers of Structural and Civil Engineering  2019, Vol. 13 Issue (4): 751-766   https://doi.org/10.1007/s11709-018-0509-z
  本期目录
Experimental research on the multilayer compartmental particle damper and its application methods on long-period bridge structures
Zhenyuan LUO, Weiming YAN, Weibing XU(), Qinfei ZHENG, Baoshun WANG
Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China
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Abstract

Particle damping technology has attracted extensive research and engineering application interest in the field of vibration control due to its prominent advantages, including wide working frequency bands, ease of installation, longer durability and insensitivity to extreme temperatures. To introduce particle damping technology to long-period structure seismic control, a novel multilayer compartmental particle damper (MCPD) was proposed, and a 1/20 scale test model of a typical long-period self-anchored suspension bridge with a single tower was designed and fabricated. The model was subjected to a series of shaking table tests with and without the MCPD. The results showed that the seismic responses of the flexible or semi-flexible bridge towers of long-period bridges influence the seismic responses of the main beam. The MCPD can be conveniently installed on the main beam and bridge tower and can effectively reduce the longitudinal peak displacement and the root mean square acceleration of the main beam and tower. In addition, no particle accumulation was observed during the tests. A well-designed MCPD can achieve significant damping for long-period structures under seismic excitations of different intensities. These results indicate that the application of MCPDs for seismic control of single-tower self-anchored suspension bridges and other long-period structures is viable.

Key wordsenergy dissipation devices    multilayer compartmental particle damper    self-anchored suspension bridges    shaking tables test    long-period structure    seismic control
收稿日期: 2018-01-19      出版日期: 2019-07-10
Corresponding Author(s): Weibing XU   
 引用本文:   
. [J]. Frontiers of Structural and Civil Engineering, 2019, 13(4): 751-766.
Zhenyuan LUO, Weiming YAN, Weibing XU, Qinfei ZHENG, Baoshun WANG. Experimental research on the multilayer compartmental particle damper and its application methods on long-period bridge structures. Front. Struct. Civ. Eng., 2019, 13(4): 751-766.
 链接本文:  
https://academic.hep.com.cn/fsce/CN/10.1007/s11709-018-0509-z
https://academic.hep.com.cn/fsce/CN/Y2019/V13/I4/751
type physical quantity dimension similarity relation similarity coefficient
geometric dimensions size L [L] SL 0.05000
displacement δ [L] Sδ=SL 0.05000
material parameter elastic modulus E [FL2] SE 1.00000
stress σ [FL2] Sσ 1.00000
equivalent mass density ρe [FT2L4] Sρe 2.85000
dynamic index time T T ST=S LS ρe/ SE 0.11300
acceleration a [FL2] Sa=S E/(S LSρ e) 7.02000
frequency v T1 Sv=1/ST 8.89000
stiffness k [FL1] SK=S ESL 0.05000
mass m [FL1] Sm= SρeSL3 0.00084
Tab.1  
Fig.1  
Fig.2  
structure cavity size1 (m) layers damping particle parameters2
L D H N d (mm) material Rm
main beam 1.2 0.8 0.4 4 12 steel ball 2%
3%
4%
5%
bridge tower 1.0 0.6 0.4 4 12 steel ball
Tab.2  
Fig.3  
table size of shaking table 1 m × 1 m
number of shaking table 8
maximum displacement ±7.5 cm
carrying capacity 5 t/ (single shaking table)
maximum speed 60 cm/s
frequency range 0.1 Hz?50 Hz
maximum acceleration 1.5g (the full load)
control mode acceleration control
vibration wave sine wave, random wave and seismic wave
Tab.3  
Fig.4  
Fig.5  
case number earthquake wave A (g) Rm (%) input direction
#1–#9 EL-Centro 0.25, 0.71, 1.52 2, 3, 4, 5 X
#10–#18 ILA005 0.25, 0.71, 1.52 2, 3, 4, 5 X
#19–#27 Arti 0.25, 0.71, 1.52 2, 3, 4, 5 X
Tab.4  
Fig.6  
parameters Rm(%)
MCPD 0% MCPD 2% MCPD 3% MCPD 4% MCPD 5%
ω μ ω μ ω μ ω μ ω μ
main beam 1.93 1.72 1.88 3.27 1.85 4.43 1.82 6.09 1.78 6.24
bridge tower 4.96 1.85 4.82 3.46 4.73 4.39 4.66 5.96 4.57 6.13
Tab.5  
Fig.7  
Fig.8  
Fig.9  
Fig.10  
Fig.11  
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