Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (11): 3141-3150.doi: 10.13229/j.cnki.jdxbgxb.20220138

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Performance and application of novel self-centering viscous damper

Zhan-yu BU(),Jie HE,Bin-wu YU   

  1. School of Civil & Environmental Engineering and Geography Science，Ningbo University，Ningbo 315211，China
  • Received:2022-02-16 Online:2023-11-01 Published:2023-12-06

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Abstract:

In order to increase the post-earthquake repairability of frame structures and to reduce the earthquake residual displacement of buildings， the strengthening scheme of adding self-centering viscous dampers （SCVD） was proposed. The mechanical model of SCVD was established. The proposed model was validated through a suite of SCVD mechanical performance tests. The damper force characteristics of SCVD under three initial pressures were analyzed. The seismic resistant simplified calculation method for installation of viscous damper in single-degree-of-freedom frame structures was proposed and validated through history analysis. The results show that， under the same initial pressure， with the increasing of loading frequency， the yielding damping force， peak damping force， energy dissipation and effective damping ratio increased. Under the same loading frequency and displacement amplitude， with the increasing of initial pressure， the yielding damping force， peak damping force and energy dissipation increased. Compared with normal FVD mechanical property， the damping force of SCVD increased， the energy dissipation increased not much. The time history analysis of steel frame structure indicated that among the two damper layout scheme， the damper force of SCVD was bigger than that of fluidic viscous damper （FVD）， The frame displacement and residual displacement of FVD scheme were larger than that of SCVD scheme. The time history analysis showed that with the increasing of structure period， the displacement demand increased， the base shear of SCVD frame structure was nearly the same with FVD frame scheme， the displacement demand of FVD scheme was larger than that of SCVD scheme. The SCVD can be used for seismic strengthening of frame structures in high seismic intensity area， which has better aseismic performance compared with those of FVD.

Key words: frame structure, seismic strengthen, self-centering viscous damper, mechanics model, simplified analysis method

CLC Number: 

  • TU391

Fig.1

Configuration of the proposed self-centering FVD"

Table 1

Parameter used in SCVD analytical model"

名义油缸压力p0/MPa预压力荷载F0/kN初始摩擦力Fmin/kN恢复力割线刚度K0/（kN·mm-1）
29.044.42.62.1
72.5111.26.72.7
116.0177.910.73.0

Fig.2

Damper test and simulation results for 72.5 MPa initial pressure"

Fig.3

Four damper force components simulation results for 72.5 MPa initial pressure"

Fig.4

Damper simulation results for 72.5 MPa initial pressure SFVD and FVD"

Table 2

Comparison of FVD and SCVD"

项目普通阻尼器自复位阻尼器
最大阻尼力/kN累积能量耗散/（kN·mm）等效黏滞阻尼最大阻尼力/kN累积能量耗散/（kN·mm）等效黏滞阻尼
准静态-50 mm138.51 866.40.043256.93 199.80.040
2.0 Hz-40 mm154.111 482.20.296278.412 655.80.181

Fig.5

Illustration of behavior of analyzed systems"

Table 3

Main parameters of main structure and FVD and SCVD"

参数数值
Rμ12345
Te/s0.20.50.751.01.52.03.0
βV0.10
F0/Fy0.20

Table 4

Near-fault pulse-like ground motions （Original record）"

编号名称年份站点震级场地类型峰值加速度/g峰值速度/（cm·s-1）
1Imperial Valley-061979Agrarias6.53D0.287334.92
2Loma Prieta1989Saratoga-Aloha Ave6.93C0.307926.42
3Landers1992Yermo Fire Station7.28D0.169041.80

Fig.6

Code earthquake response factor curve"

Fig.7

Code earthquake response spectra and the adjusted ground motions response spectra"

Fig.8

Frame seismic response with self-center damper under ground motion No.1 attack"

Fig.9

Frame seismic response with normal damper under ground motion No.1 attack"

Fig.10

Comparison of simplified analysis results and history analysis results"

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