Date

2023-1-12

Author

Pehlivan, Barış Mert

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Cold-formed steel (CFS) structural systems are considered to be an innovative and newly developing construction method. Because of advantages such as lower fabrication periods, high strength/weight ratio and ease of construction, CFS structural systems have been used increasingly all around the world, including seismically active areas. Although there have been many studies in the literature, CFS structural systems are relatively new for the civil engineering practice and few existing specifications regarding the subject still lack necessary detailing for safe and economical design and construction of these systems. As a result, there is a major concern regarding the performance of CFS structural systems especially under seismic actions. The current study aims at improving the understanding of the structural behavior of a specific type of CFS building system, where the lateral load resisting system is made of shear walls sheathed with oriented strand board (OSB) panels. An extensive and detailed experimental investigation on various components of a typical sheathed CFS shear wall system, as well as the connections between these components was conducted in this study. Experimental program consisted of several stages and various components of a lateral load resisting CFS system. Load testing of hold down devices, investigation of different sheathing and fastener configurations for shear walls, tests on shear wall groups where wall panels are placed both horizontally and vertically and investigation of various connection details between wall panels, as well as experiments on three dimensional structural assemblies utilizing CFS shear walls and a floor system were included in the study. In addition to the extensive experimental part, a numerical study was also included in the thesis work. By using the experimental findings and load-displacement behavior data obtained from CFS shear walls, both single wall panels and full-scale buildings were modeled and analyzed. It was aimed to investigate the seismic response of CFS framed archetype buildings utilizing OSB sheathed wall panels with different levels of stiffness and shear resistance. Nonlinear time history analyses were conducted on archetype buildings and collapse performance evaluation was performed according to FEMA P695 methodology.

Subject Keywords

Cold formed steel, CFS shear wall, Seismic performance, Computational modeling

URI

https://hdl.handle.net/11511/101989

Collections

Graduate School of Natural and Applied Sciences, Thesis