A novel cable-pulley based self-centering energy dissipation (CP-SCED) brace for seismic induced damage mitigation of RC double-column bridge piers

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-03-29 DOI:10.1016/j.engstruct.2025.120130

Huailei Qin , Gabriele Milani , Kaiming Bi , Huihui Dong , Xiuli Du

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引用次数: 0

Abstract

An innovative cable-pulley based self-centering energy dissipation (CP-SCED) brace with adjustable hysteresis parameters is proposed in the present study. It is designed to control seismic induced damages to engineering structures, with the aim of balancing different damage indicators for the structure. The proposed CP-SCED brace consists of a self-centering system, an external friction energy dissipation system and a cable-pulley system. The corresponding purposes are to provide self-restoring force, dissipating energy, and adjusting post-yield stiffness, respectively. The overall configuration, working mechanism and restoring-force model of this brace are first introduced. A simplified specimen is designed, manufactured and tested to validate the analytical model. Parametric studies are conducted to explore the influences of the key brace parameters on the hysteretic performance. Subsequently, the brace is applied to an RC double-column bridge pier, and system-level parametric analyses are carried out to evaluate the roles of different brace design parameters. Based on which, optimal parameters are recommended and verified. Finally, a ‘partial self-centering’ CP-SCED brace, which allows for certain static residual deformation, is identified as suitable for achieving a reasonable balance between the peak and residual deformations of the structure. Compared to the bare pier, the average peak and residual drift ratios are reduced by 66.14 % and 91.55 %, respectively. Moreover, the average base shear force of bridge piers with the brace recommended in this study is 93.22 % of that of piers with traditional SCED braces.

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.