DEVELOPMENT OF A LOADING PROTOCOL FOR STEEL BEAM-TO-COLUMN CONNECTIONS

Date

2025-7-30

Author

Bıçakçıoğlu, Kaan

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In moment-resisting frame (MRF) systems, the design of connection elements plays a critical role in the overall structural performance, and damage to these elements during seismic events may lead to significant losses. The evaluation of the seismic performance of both existing and newly developed connection types is essential for reliable design. In this context, cyclic loading protocols are crucial to obtain information regarding the seismic behavior of connection elements. While it is important that these loading protocols accurately reflect the actual behavior and maintain an adequate level of safety, overly conservative assumptions that may unnecessarily increase the cost of connection elements should be avoided. In this study, the behavior of MRFs, designed according to current standards and considering deterioration effects, has been investigated under far-field and near-field ground motion sets. During the scaling of ground motions, it has been ensured that the average spectral acceleration values corresponding to periods between 0.2 and 1.5 times the fundamental period exceed the maximum considered earthquake (MCE) and design earthquake (DE) levels. Unlike the commonly adopted AISC 341-22 loading protocol, the proposed protocol emphasizes the nonsymmetrical behavior of the structure, which has been observed to occur independently of the selected ground motion set. Within this scope, a unified quasi-static cyclic loading protocol that analytically represents the nonsymmetric behavior of the structure has been developed.

Subject Keywords

Steel Moment Resisting Frame, Loading Protocol, Nonsymmetrical Loading, Time History Analysis, Degradation Model

URI

https://hdl.handle.net/11511/115492

Collections

Graduate School of Natural and Applied Sciences, Thesis