Event Title
STR-957: EFFECTS OF CLT-INFILL WALLS ON THE COLLAPSE BEHAVIOR OF STEEL MOMENT RESISTING FRAMES
Location
London
Event Website
http://www.csce2016.ca/
Description
Over the past six years, to increase the use of renewable materials in the construction industry, a novel steel-timber hybrid building system was developed and studied at the University of British Columbia and FPInnovations. The hybrid structural system was a steel moment resisting frames (SMRFs) with Cross Laminated Timber (CLT) infill walls. These studies were mainly on developing: novel connection types, new constitutive laws for the CLT walls, and force-based and displacement-based design guidelines. The effect of CLT infills on the collapse risk of the SMRFs was not explicitly investigated, and is the topic of this paper. With consideration of seismicity of Vancouver (Canada)and using the 2010 National Building Code of Canada (NBCC) force based design guideline, 3- and 6-storey, 3-bay, bare and middle bay CLT-infilled SMRFs, were designed. Nonlinear analytical building models that account for the frame-infill interactions, were developed in the OpenSees finite element tool. L-shaped steel bracket connections were modeled using experimentally calibrated nonlinear two-node-link elements. Moreover, to allow brackets deformation, a small gap was provided at the interface of the steel frame members and CLT infill panels. To assess the collapse behavior and collapse fragility curves, incremental dynamic analysis was performed using 60 ground motion records selected with seismicity of Vancouver. The infill panels have significantly increased the collapse margin ratio, thereby reducing the collapse risk of SMRFs during server earthquake events.
Included in
STR-957: EFFECTS OF CLT-INFILL WALLS ON THE COLLAPSE BEHAVIOR OF STEEL MOMENT RESISTING FRAMES
London
Over the past six years, to increase the use of renewable materials in the construction industry, a novel steel-timber hybrid building system was developed and studied at the University of British Columbia and FPInnovations. The hybrid structural system was a steel moment resisting frames (SMRFs) with Cross Laminated Timber (CLT) infill walls. These studies were mainly on developing: novel connection types, new constitutive laws for the CLT walls, and force-based and displacement-based design guidelines. The effect of CLT infills on the collapse risk of the SMRFs was not explicitly investigated, and is the topic of this paper. With consideration of seismicity of Vancouver (Canada)and using the 2010 National Building Code of Canada (NBCC) force based design guideline, 3- and 6-storey, 3-bay, bare and middle bay CLT-infilled SMRFs, were designed. Nonlinear analytical building models that account for the frame-infill interactions, were developed in the OpenSees finite element tool. L-shaped steel bracket connections were modeled using experimentally calibrated nonlinear two-node-link elements. Moreover, to allow brackets deformation, a small gap was provided at the interface of the steel frame members and CLT infill panels. To assess the collapse behavior and collapse fragility curves, incremental dynamic analysis was performed using 60 ground motion records selected with seismicity of Vancouver. The infill panels have significantly increased the collapse margin ratio, thereby reducing the collapse risk of SMRFs during server earthquake events.
https://ir.lib.uwo.ca/csce2016/London/Structural/95
