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Steel and Composite Structures Volume 34, Number 6, March25 2020 , pages 863-875 DOI: https://doi.org/10.12989/scs.2020.34.6.863 |
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Experimental and numerical evaluation of rigid connection with reduced depth section |
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Allah Reza Moradi Garoosi, Mehrzad Tahamouli Roudsari and Behrokh Hosseini Hashemi
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| Abstract | ||
| After medium or strong earthquakes, damage in the reduced portion of RBS connections occurs due to plastic deformations. The purpose of this paper is to numerically and experimentally investigate the reduced depth section connection as a replaceable fuse. In this regard, three commonly used rigid connections with RBS, a replaceable fuse with RBS, and a replaceable fuse with Reduced Depth Section (RDS-F) were evaluated. All specimens were subjected to quasi-static cyclic load until failure. Although the final strength of the RDS-F is lower than that of the other two, laboratory results showed that it had the maximum ductility among the three samples. The numerical models of all three laboratory samples were constructed in ABAQUS, and the results were verified with great accuracy. The results of more than 28 numerical analyses showed that the RDS-F sample is more ductile than the other specimens. Moreover, the thickness of the web and the plastic section modulus increasing, the final strength would be equal to the other specimens. Therefore, the modified RDS-F with replaceability after an earthquake can be a better alternative for RBS connections. | ||
| Key Words | ||
| steel moment resisting frame; rigid connection; replaceable fuse; beam with reduced depth section; beam with reduced flange section | ||
| Address | ||
| Allah Reza Moradi Garoosi: Department of Civil Engineering, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran Mehrzad Tahamouli Roudsari: Department of Civil Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran Behrokh Hosseini Hashemi: Structural Eng. Research Center, The Int\'l Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran | ||