Experimental investigation on the seismic performance of T-shaped connected modular beam-column connection

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2025-03-19 DOI:10.1016/j.engstruct.2025.120108

Jixiang Xu, Jizong Liang, Jianping Han, Yifan Zhang

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引用次数: 0

Abstract

This paper introduces T-shaped connected modular beam-column (TMBC) connection that incorporates a Replaceable Panel Zone Column (RPZC). This semi-rigid connection design enables localized reinforcement at a reduced cost, significantly enhancing the overall seismic resistance capability of the TMBC connection. To this end, three types of TMBC connection specimens were designed and manufactured: the RPZC flange plate reinforced specimen (SPC-1), the RPZC web plate reinforced specimen (SPC-2), and the T-shaped connector reinforced specimen (SPC-3). All three specimens were subsequently tested under pseudo-static conditions. This study comprehensively evaluates the seismic performance and failure characteristics of TMBC connections in accordance with an in-depth analysis of the entire process of elastic-plastic deformation. Additionally, a comparative analysis is conducted, focusing on hysteretic curves, skeleton curves, equivalent viscous damping coefficients, and stiffness degradation patterns. Moreover, theoretical derivations have confirmed that the deformation at the flange connection is negligible. The experimental results indicate that the load-bearing capacity of SPC-1 is 5.2 % higher than that of SPC-2 and 11–13.5 % higher than that of SPC-3, while the load-bearing capacity of SPC-2 is approximately 8 % higher than that of SPC-3. At a horizontal displacement of 56.2 mm, the energy dissipated by SPC-3 is about 19 % and 22 % less than that of SPC-1 and SPC-2, respectively. Furthermore, reinforcing the flange and web in the RPZC region proves more effective than reinforcing only the flange plate on the T-connector, demonstrating that this reinforcement method can effectively transfer the plastic hinge to the T-connector. In conclusion, the modular design not only enhances the assembly efficiency of TMBC connections but also achieves semi-rigid behavior at the joints through the T-connector. Additionally, the design of RPZC and the T-connector addresses the issue of insufficient replaceability in the connections.

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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.