Design Method of Core-Separated Assembled Buckling Restrained Braces Confined by Two Lightweight Concrete-Infilled Tubes
This paper introduces a novel type of buckling restrained braces (BRBs) called core-separated assembled BRBs (CSA-BRBs). These braces are comprised of two single BRBs that are confined by lightweight concrete-infilled tubes, which are longitudinally connected by two continuous webs. The CSA-BRBs uti...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/7/4306 |
| _version_ | 1797608296519041024 |
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| author | Boli Zhu Junyuan Zhao Yuqing Yang |
| author_facet | Boli Zhu Junyuan Zhao Yuqing Yang |
| author_sort | Boli Zhu |
| collection | DOAJ |
| description | This paper introduces a novel type of buckling restrained braces (BRBs) called core-separated assembled BRBs (CSA-BRBs). These braces are comprised of two single BRBs that are confined by lightweight concrete-infilled tubes, which are longitudinally connected by two continuous webs. The CSA-BRBs utilize materials more efficiently by increasing the height of the webs to create a large inner cavity, leading to an economical design. This paper predicts the threshold of the restraint ratio of CSA-BRBs approximately. This is achieved by assuming that the maximum moment resulting from applied loads at mid-height is less than the moment-bearing resistance that is conducted according to the outermost fiber of the external restraining section reading yielding. Elastic-plastic numerical analysis is conducted using FEM with beam elements for CSA-BRBs that are subjected to both monotonic and cyclic axial loads. The load resistance, hysteretic performance, and failure mechanism of CSA-BRBs are investigated by varying their restraining ratios. It is recommended that the restraint ratio threshold of CSA-BRBs under monotonic axial compression is used as a bearing type and the restraint ratio threshold of CSA-BRBs under axially compressive-tensile cyclic loads as an energy-dissipation type. This method provides a complete design for CSA-BRBs. |
| first_indexed | 2024-03-11T05:42:28Z |
| format | Article |
| id | doaj.art-027b529579df479f8472a8a48769a79a |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T05:42:28Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-027b529579df479f8472a8a48769a79a2023-11-17T16:18:29ZengMDPI AGApplied Sciences2076-34172023-03-01137430610.3390/app13074306Design Method of Core-Separated Assembled Buckling Restrained Braces Confined by Two Lightweight Concrete-Infilled TubesBoli Zhu0Junyuan Zhao1Yuqing Yang2School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100084, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100084, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100084, ChinaThis paper introduces a novel type of buckling restrained braces (BRBs) called core-separated assembled BRBs (CSA-BRBs). These braces are comprised of two single BRBs that are confined by lightweight concrete-infilled tubes, which are longitudinally connected by two continuous webs. The CSA-BRBs utilize materials more efficiently by increasing the height of the webs to create a large inner cavity, leading to an economical design. This paper predicts the threshold of the restraint ratio of CSA-BRBs approximately. This is achieved by assuming that the maximum moment resulting from applied loads at mid-height is less than the moment-bearing resistance that is conducted according to the outermost fiber of the external restraining section reading yielding. Elastic-plastic numerical analysis is conducted using FEM with beam elements for CSA-BRBs that are subjected to both monotonic and cyclic axial loads. The load resistance, hysteretic performance, and failure mechanism of CSA-BRBs are investigated by varying their restraining ratios. It is recommended that the restraint ratio threshold of CSA-BRBs under monotonic axial compression is used as a bearing type and the restraint ratio threshold of CSA-BRBs under axially compressive-tensile cyclic loads as an energy-dissipation type. This method provides a complete design for CSA-BRBs.https://www.mdpi.com/2076-3417/13/7/4306core-separated assembled BRBelastic buckling loadload resistancehysteretic responserestraint ratio threshold |
| spellingShingle | Boli Zhu Junyuan Zhao Yuqing Yang Design Method of Core-Separated Assembled Buckling Restrained Braces Confined by Two Lightweight Concrete-Infilled Tubes Applied Sciences core-separated assembled BRB elastic buckling load load resistance hysteretic response restraint ratio threshold |
| title | Design Method of Core-Separated Assembled Buckling Restrained Braces Confined by Two Lightweight Concrete-Infilled Tubes |
| title_full | Design Method of Core-Separated Assembled Buckling Restrained Braces Confined by Two Lightweight Concrete-Infilled Tubes |
| title_fullStr | Design Method of Core-Separated Assembled Buckling Restrained Braces Confined by Two Lightweight Concrete-Infilled Tubes |
| title_full_unstemmed | Design Method of Core-Separated Assembled Buckling Restrained Braces Confined by Two Lightweight Concrete-Infilled Tubes |
| title_short | Design Method of Core-Separated Assembled Buckling Restrained Braces Confined by Two Lightweight Concrete-Infilled Tubes |
| title_sort | design method of core separated assembled buckling restrained braces confined by two lightweight concrete infilled tubes |
| topic | core-separated assembled BRB elastic buckling load load resistance hysteretic response restraint ratio threshold |
| url | https://www.mdpi.com/2076-3417/13/7/4306 |
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