Alireza Bagheri Sabbagh - Research Student
Telephone: 25728
Room: E110A
email : A.Sabbagh@sheffield.ac.uk
Research Group
Research Project
THIN-WALLED STEEL SEISMIC RESISTANT MOMENT FRAME BUILDINGS
Recently Cold-Formed Thin-Walled Steel Sections are becoming more popular in housing construction. One of the main advantages of the thin-walled sections is the flexibility in shaping various elements of load bearing sections. Careful attention should be paid on low local buckling stress of these types of sections. In the UK and developed countries, thin-walled stud walls have been used for partitions and framing systems for many years. The stud wall framing systems are available for low rise as well as multi storey residential buildings in low seismicity regions.
Can the thin-walled sections (sections with the range of thicknesses of as thin as 1mm to as thick as 6mm) be used in moment frame buildings in seismic prone regions?
The development of thin-walled moment frame buildings in accordance with seismic requirements is under investigation by the American Iron and Steel Institute (AISI) for use in seismic regions in one storey structures. In this new type of structure, energy dissipation occurs before yielding of beams or columns through slippage and local yielding of bolts in the connections. This is not structurally efficient in multi storey frame buildings.
This research aims to:
Develop efficient details for thin-walled moment frames that can be used for multi storey buildings in seismic prone regions.
Based on this aim, following objectives are essential to be achieved:
- Appropriate design to enable seismic energy to be dissipated through framing actions and yielding of thin-walled beams.
- Reducing the Design Earthquake forces in comparison with current thin-walled buildings that are suffering from unsatisfactory ductility. This leads to lighter overall construction and, hence, in more economic structures.
- Using bolted connections to eliminate welding completely, which leads to a cost effective solution and a feasible approach for mass producing. This can be more significant when considering extensive work on quality control and inspection of welded joints.
The methodology of this research comprises analytical and experimental investigations.
