Toggle buckling-restrained brace systems and a corresponding design method for the seismic retrofit of bridge bents

doi:10.1016/j.engstruct.2020.110996

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Toggle buckling-restrained brace systems and a corresponding design method for the seismic retrofit of bridge bents
	Shi, Yan 1; Zhong, Zhengwu 1; Qin, Hongguo 1; Han, Jianping 1; Sun, Zhiguo 2
刊名	Engineering Structures
	2020-10-15
卷号	221
关键词	Bridges Buckling Connectors (structural) Energy dissipation Retrofitting Seismology Buckling restrained braces Displacement amplification Displacement demand Displacement-based designs Energy dissipation capacities Nonlinear time history analysis Seismic retrofits Small displacement
ISSN号	01410296
DOI	10.1016/j.engstruct.2020.110996
英文摘要	Based on the structural fuse concept, easily replaceable fuses are designed to sustain seismic demand and dissipate seismic energy while keeping RC bridge bents elastic, so the retrofitted bents have a very low displacement demand. Buckling-restrained braces (BRBs) are common fuses used in the seismic retrofit of bridge bents. However, the energy dissipation capacity of BRBs cannot be fully utilized under a small displacement if the diagonal or inverted-V configurations are adopted. Combining the structural fuse concept with toggle brace mechanisms, this paper studied a toggle BRB system that can amplify the effect of damper devices. The system was designed to keep the RC bridge bents elastic through the increased energy dissipation capacity of the BRBs. Several key parameters, including the displacement amplification factor and the steel core length-to-total length ratio, were discussed. The admissible values of the displacement amplification factor for different bents were plotted with contour lines. In addition, a displacement-based design procedure was proposed that ensured the bents achieved the target performance under a design-level earthquake. Two design examples were illustrated: a bent that failed in a flexural mode and another bent that failed in a flexural-shear mode. Finally, the feasibility of the design procedure was validated with nonlinear time history analyses. © 2020 Elsevier Ltd
WOS研究方向	Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000561737700007
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150997]
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.Institute of Disaster Prevention, China Earthquake Administration, Beijing; 065201, China
推荐引用方式 GB/T 7714	Shi, Yan,Zhong, Zhengwu,Qin, Hongguo,et al. Toggle buckling-restrained brace systems and a corresponding design method for the seismic retrofit of bridge bents[J]. Engineering Structures,2020,221.
APA	Shi, Yan,Zhong, Zhengwu,Qin, Hongguo,Han, Jianping,&Sun, Zhiguo.(2020).Toggle buckling-restrained brace systems and a corresponding design method for the seismic retrofit of bridge bents.Engineering Structures,221.
MLA	Shi, Yan,et al."Toggle buckling-restrained brace systems and a corresponding design method for the seismic retrofit of bridge bents".Engineering Structures 221(2020).