Self-centering performance of long-span railway continuous beam-arch bridge subjected to near-fault ground motions

doi:10.11990/jheu.201810060

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Self-centering performance of long-span railway continuous beam-arch bridge subjected to near-fault ground motions
	Shi, Yan 1; Zhang, Zhanhong 1; Han, Jianping 1; Chen, Baokui 2
刊名	Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University
	2020-03-05
卷号	41 期号:3 页码:390-396
关键词	Arches Energy dissipation Nonlinear analysis Piers Railroads Seismic design Seismology Buckling restrained braces Dynamic non-linear analysis Functional separations Horizontal displacements Maximum displacement Near fault ground motion Relative displacement Residual displacement
ISSN号	10067043
DOI	10.11990/jheu.201810060
英文摘要	The seismic isolation and damage controlling system with bearing & brace combination of railway bridges is proposed based on the seismic isolation design concept of 'functional separation'. The sliding bearings afford the vertical loads of the beam. The self-centering energy dissipation brace (SCEDB) and buckling restrained brace (BRB) control the horizontal displacement of the beam, so the functional separation is achieved under the combined action. The design criteria and methods of functional separation seismic isolation and damage controlling system are proposed with the example of a long-span railway continuous beam-arch bridge. Using the OpenSees seismic analysis platform, the dynamic nonlinear analysis model is established to study the seismic response of bridge structure with different seismic mitigation schemes under near-fault ground motions with the effects of forward directivity, fling step, and without velocity pulse. The maximum displacement and residual displacement of the brace between the pier and beam are mainly concerned. The results show that the seismic isolation and damage controlling system with sliding bearing and energy dissipation brace can control the relative displacement between the pier and beam greatly, and the SCEDB brace can reduce or even eliminate the residual displacement between pier and beam. What's more, under near-fault ground motions with velocity pulse and without velocity pulse, the combined use of SCEDB and BRB can achieve the seismic isolation to the maximum extent when the self-centering force ratio ζ, i.e. the ratio of self-centering force to super-structure weight, are 0.1 and 0.05, respectively. © 2020, Editorial Department of Journal of HEU. All right reserved.
语种	中文
出版者	Editorial Board of Journal of Harbin Engineering
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115239]
专题	土木工程学院教务处（创新创业学院）
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Civil Engineering and Architecture, Nanchang University, Nanchang; 330000, China
推荐引用方式 GB/T 7714	Shi, Yan,Zhang, Zhanhong,Han, Jianping,et al. Self-centering performance of long-span railway continuous beam-arch bridge subjected to near-fault ground motions[J]. Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University,2020,41(3):390-396.
APA	Shi, Yan,Zhang, Zhanhong,Han, Jianping,&Chen, Baokui.(2020).Self-centering performance of long-span railway continuous beam-arch bridge subjected to near-fault ground motions.Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University,41(3),390-396.
MLA	Shi, Yan,et al."Self-centering performance of long-span railway continuous beam-arch bridge subjected to near-fault ground motions".Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University 41.3(2020):390-396.