Experimental Study on the Seismic Behavior of All-Steel Buckling-Restrained Braces Without an Unbonded Material Layer
Three all-steel buckling-restrained brace (ABRB) specimens without unbonded materials were designed and manufactured. Through low-cycle reciprocating load tests, the seismic performance of these buckling-restrained braces was investigated, and the influence of the absence of an unbonded layer on fai...
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MDPI AG
2025-05-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/15/10/1626 |
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| author | Kechuan Wu Guanglan Wei Longfei Zhang Wenzheng Yu Xiang Lan |
| author_facet | Kechuan Wu Guanglan Wei Longfei Zhang Wenzheng Yu Xiang Lan |
| author_sort | Kechuan Wu |
| collection | DOAJ |
| description | Three all-steel buckling-restrained brace (ABRB) specimens without unbonded materials were designed and manufactured. Through low-cycle reciprocating load tests, the seismic performance of these buckling-restrained braces was investigated, and the influence of the absence of an unbonded layer on failure modes, energy dissipation capacity, and low-cycle fatigue life was examined. The research findings suggest that in all-steel buckling-restrained braces lacking an unbonded layer, the excessive friction between the energy dissipation unit and the restraining unit can, to a certain degree, increase local compressive stress. This makes the braces more susceptible to local buckling at the ends. The frictional effect causes the axial force of the ABRB to follow a distribution pattern where it is greater at the ends and smaller in the middle. Correspondingly, the buckling wavelength of the energy dissipation unit shows a pattern of being shorter at the ends and longer in the middle, which also results in a significant cyclic hardening phenomenon in the ABRB. The fatigue performance of the ABRB is inversely related to the amplitude of local buckling in the energy dissipation unit. |
| format | Article |
| id | doaj-art-e394efc6366144198deec47d8fbd26de |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-e394efc6366144198deec47d8fbd26de2025-08-20T02:33:31ZengMDPI AGBuildings2075-53092025-05-011510162610.3390/buildings15101626Experimental Study on the Seismic Behavior of All-Steel Buckling-Restrained Braces Without an Unbonded Material LayerKechuan Wu0Guanglan Wei1Longfei Zhang2Wenzheng Yu3Xiang Lan4College of Architecture and Civil Engineering, Kunming University, Kunming 650214, ChinaCollege of Architecture and Civil Engineering, Dianchi College, Kunming 650228, ChinaCollege of Architecture and Civil Engineering, Kunming University, Kunming 650214, ChinaCollege of Architecture and Civil Engineering, Kunming University, Kunming 650214, ChinaCollege of Architecture and Civil Engineering, Kunming University, Kunming 650214, ChinaThree all-steel buckling-restrained brace (ABRB) specimens without unbonded materials were designed and manufactured. Through low-cycle reciprocating load tests, the seismic performance of these buckling-restrained braces was investigated, and the influence of the absence of an unbonded layer on failure modes, energy dissipation capacity, and low-cycle fatigue life was examined. The research findings suggest that in all-steel buckling-restrained braces lacking an unbonded layer, the excessive friction between the energy dissipation unit and the restraining unit can, to a certain degree, increase local compressive stress. This makes the braces more susceptible to local buckling at the ends. The frictional effect causes the axial force of the ABRB to follow a distribution pattern where it is greater at the ends and smaller in the middle. Correspondingly, the buckling wavelength of the energy dissipation unit shows a pattern of being shorter at the ends and longer in the middle, which also results in a significant cyclic hardening phenomenon in the ABRB. The fatigue performance of the ABRB is inversely related to the amplitude of local buckling in the energy dissipation unit.https://www.mdpi.com/2075-5309/15/10/1626all-steel buckling-restrained braceunbonded materialsfatigue performancefatigue lifelocal buckling |
| spellingShingle | Kechuan Wu Guanglan Wei Longfei Zhang Wenzheng Yu Xiang Lan Experimental Study on the Seismic Behavior of All-Steel Buckling-Restrained Braces Without an Unbonded Material Layer Buildings all-steel buckling-restrained brace unbonded materials fatigue performance fatigue life local buckling |
| title | Experimental Study on the Seismic Behavior of All-Steel Buckling-Restrained Braces Without an Unbonded Material Layer |
| title_full | Experimental Study on the Seismic Behavior of All-Steel Buckling-Restrained Braces Without an Unbonded Material Layer |
| title_fullStr | Experimental Study on the Seismic Behavior of All-Steel Buckling-Restrained Braces Without an Unbonded Material Layer |
| title_full_unstemmed | Experimental Study on the Seismic Behavior of All-Steel Buckling-Restrained Braces Without an Unbonded Material Layer |
| title_short | Experimental Study on the Seismic Behavior of All-Steel Buckling-Restrained Braces Without an Unbonded Material Layer |
| title_sort | experimental study on the seismic behavior of all steel buckling restrained braces without an unbonded material layer |
| topic | all-steel buckling-restrained brace unbonded materials fatigue performance fatigue life local buckling |
| url | https://www.mdpi.com/2075-5309/15/10/1626 |
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