Investigation on Seismic Performance of Bridge with Self-centering Friction Dampers

doi:10.15961/j.jsuese.201800601

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	Investigation on Seismic Performance of Bridge with Self-centering Friction Dampers
	Liu, Yunshuai 1; Han, Jianping 1; Wang, Xiaoqin 2
刊名	Gongcheng Kexue Yu Jishu/Advanced Engineering Science
	2018-11-20
卷号	50 期号:6 页码:77-83
关键词	Bearings (machine parts) Bearings (structural) Concrete bridges Friction Piers Pistons Friction damper Internal forces Residual displacement Seismic isolation Self centering
ISSN号	20963246
DOI	10.15961/j.jsuese.201800601
英文摘要	Seismic isolation has been already applied in bridges widely. It will inevitably cause large post-earthquake residual displacement between bridge superstructure and substructure. In order to effectively reduce the inertia force transferring to the pier to improve the ability of seismic isolation and reduce the damping force to improve the capability of self-centering, a new-type self-centering seismic isolated bridge system was proposed. This system was composed of a new type friction damper with self-centering function and the teflon sliding bearing instead of the traditional seismic isolation bearing. This new-type friction damper with self-centering function had stable friction force when the piston of the damper moves away from the equilibrium position. On the contrary, it had not friction force to reduce the consumption of the re-centering capacity when the piston moved to the equilibrium position. In addition, the bridge structure and the damper were connected by the cable in order to ensure that the damper was tensioned only and the superstructure could move relatively to the pier back and forth. In order to verify the validity of this self-centering seismic isolated bridge system, this new-type self-centering seismic isolated 4-span continuous bridge system and the same bridge structure with non-isolation bearings and lead rubber bearings (LRBs) were modelled via OpenSees. Then time history analysis was conducted for each model under the transverse ground motion record respectively. The pier top displacement, the relative displacement between pier and girder, and the internal forces of the pier were mainly investigated. Analytical results showed that the pier top displacement of self-centering seismic isolated bridge system is reduced to 1/8 and the internal forces at the pier bottom such as moment and shear force are reduced to 1/3 com- paring with the non-isolated bridge. Comparing with the isolated bridge with LRBs, the post-earthquake residual displacement between the girder and the pier of the self-centering seismic isolated bridge system was very small, which indicates that the proposed new-type self-centering friction damper and the self-centering seismic isolated bridge system have better self-centering and seismic isolation capacity. © 2018, Editorial Department of Advanced Engineering Sciences. All right reserved.
语种	中文
出版者	Editorial Department of Journal of Sichuan University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114743]
专题	兰州理工大学
作者单位	1.School of Civil Eng., Lanzhou Univ. of Technol., Lanzhou; 730050, China; 2.School of Civil Eng., Northwest Univ. for Nationalities, Lanzhou; 730030, China
推荐引用方式 GB/T 7714	Liu, Yunshuai,Han, Jianping,Wang, Xiaoqin. Investigation on Seismic Performance of Bridge with Self-centering Friction Dampers[J]. Gongcheng Kexue Yu Jishu/Advanced Engineering Science,2018,50(6):77-83.
APA	Liu, Yunshuai,Han, Jianping,&Wang, Xiaoqin.(2018).Investigation on Seismic Performance of Bridge with Self-centering Friction Dampers.Gongcheng Kexue Yu Jishu/Advanced Engineering Science,50(6),77-83.
MLA	Liu, Yunshuai,et al."Investigation on Seismic Performance of Bridge with Self-centering Friction Dampers".Gongcheng Kexue Yu Jishu/Advanced Engineering Science 50.6(2018):77-83.