Graduate Seminar: Colin Rogers
Advancing lateral design standards for cold-formed steel structures: Higher capacity steel sheet sheathed shear walls for mid-rise buildings
Colin Rogers, Associate Professor, McGill University
To enter into the construction market for mid-rise buildings, e.g. 5 to 8 storeys, the cold-formed steel (CFS) industry requires a solution to address the need to resist lateral loads in excess of 60 kN/m. An innovative configuration for CFS framed and sheathed shear walls was selected to provide a ductile lateral framing system of high shear resistance appropriate for mid-rise buildings; the sheathing is placed at the mid-line of the framing. The results of a laboratory based research program, the iterative design process that was followed, as well as the performance of the walls under in-plane displacement-based loading will be presented. The walls were constructed with thicker sheathing and framing members than what are currently available for design in AISI S400. The selection of the framing members was initially carried out using the tension field strip model (Yanagi & Yu); it was revised during the experimental program to better represent the forces measured during testing. The centre-sheathed shear walls were able to reach shear resistance values approaching 160 kN/m at drifts of up to 8%. These centre-sheathed shear walls represent a new category of cold-formed steel shear wall in terms of their vastly improved resistance and ductility.
Colin Rogers, P.Eng., Ph.D., is an Associate Professor of structural engineering in the Department of Civil Engineering at McGill University in Montreal, Canada. He is a member of the Canadian Standards Association CSA S16 (hot-rolled steel) and CSA S136 (cold-formed steel) technical committees, along with the AISI S400 technical committee on the seismic design of cold-formed steel framed structures. He has been involved in research on cold-formed steel structures for over twenty-five years, and also studies hot-rolled steel connections, such as shear tabs and brace connections for seismic loading, as well as the development of guidelines on the seismic design of new and retrofit of existing single-story steel buildings.
The seminar will be held in Hackerman Hall, B-17 on the Johns Hopkins University Homewood campus.
All civil engineering graduate seminars are FREE and open to the public. Attendance is required for all enrolled Civil Engineering graduate students. For parking please see link for visitors at www.jhu.edu and select information on Homewood Campus.