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Nonlinear finite element analysis of steel moment-resisting frames with shear fuse under seismic loading

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Abstract

This study investigates the impact of shear fuse link length and position on the seismic response of multi-story steel frames. Pushover evaluation and nonlinear time history analysis were applied to steel frames with varied link lengths (0.5 m, 0.75 m, 1 m) and locations (all beams, side beams, and middle beams) to predict earthquake effects. The numerical study assessed the seismic performance of 4, 8, and 12-story steel moment-resistant frames. In the investigation, 30 models will be tested using three earthquakes: Halabjah, EL-Centro, and Northridge. The data show that increasing shear fuse link length improves lateral displacements and drifts for all building heights (four, eight, and twelve stories), especially during high-intensity earthquakes. In contrast, the impact on base shear ability is exceedingly complex, most likely varying with building height and earthquake characteristics. In some circumstances, shorter links benefit low-rise frames, while longer links may favor taller frames. Shear fuse-links can significantly improve the seismic performance of steel frames by distributing energy and introducing protective structural elements. Shorter connections may be desirable for displacement management in low-story (4-story) constructions, whereas more extended linkages are likely required to maintain base shear capacity in taller (8-story) frames. Positioning linkages in all beams maximizes energy dissipation while achieving optimal displacement and drift. Pushover testing demonstrates the effectiveness of shear fuse linkages in increasing energy dissipation and safeguarding various structural parts.

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Acknowledgements

The Authors would like to extend thanks to Al-Nahrain University, Jadriya, Baghdad, Iraq for their encouragement and support.

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Correspondence to Abdulkhalik J. Abdulridha.

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AL-Shaar, A.A.M., Harba, I.S.I. & Abdulridha, A.J. Nonlinear finite element analysis of steel moment-resisting frames with shear fuse under seismic loading. Asian J Civ Eng (2024). https://doi.org/10.1007/s42107-024-01117-6

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  • DOI: https://doi.org/10.1007/s42107-024-01117-6

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