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Development and Experimental Verification of Self-Centering Haunched Plug-In Modular Connections
| 题名： | Development and Experimental Verification of Self-Centering Haunched Plug-In Modular Connections |
| 正文语种： | eng |
| 作者： | Ge Zhang;Longhe Xu;Zhongxian Li |
| 作者单位： | Beijing Jiaotong Univ.;Beijing Jiaotong Univ.;Tianjin Univ. |
| 关键词： | Modular steel structure (MSS) connection;Self-centering (SC) haunch brace;Quasi-static cyclic loading test;Hysteretic behavior;Residual deformation;Seismic recoverability |
| 摘要： | Abstract An innovative self-centering modular steel structure (SC-MSS) connection is proposed in this research, which adopts a plug-in integration technology to permit efficient construction and reliable structural continuity, introduces diagonal self-centering (SC) haunch braces installed near the connection core serving as a pleasing approach to achieve seismic improvement, safety, and recoverability purposes. In order to evaluate the seismic performance of the SC-MSS connection system, quasi-static cyclic loading tests were conducted on two SC haunch braces and three SC-MSS connections with different braces. Representative test phenomena and failure modes of the specimens were recorded during the tests, the discussion and the comparison of the primary seismic behavior indicators of the three specimens, including hysteretic responses, energy dissipation, residual deformation, and strain features, were provided. The results demonstrate that the SC haunch braces present sufficient mechanical stability and excellent self-centering behavior as expected, and all the SC-MSS connections show satisfactory development potential of bearing capacity, stable energy dissipation, and self-centering capacity. The prepressed force and post-activation stiffness of the haunch brace can impact the strength, deformation behavior, and plastic development of the connection to varying degrees. As for the resistance of tenons in the connector and the control effect of the haunch braces, they can protect the key areas of the connection by concentrating the main damage on the beam. Moreover, the SC haunch braces are able to maintain a coordinated deformation with the modules, and they can continuously provide reliable and effective restoring forces for minimizing the residual deformation of the system. |
| 出版年： | 2023 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 149 |
| 期： | 5 |
| 页码： | 04023047.1-04023047.16 |
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