A photograph of a mural on a wall in the former site of a building on Norwich Quay in Lyttelton. Sections of reinforcing steel have been laid up against the mural.
A photograph of a mural on a wall in the former site of a building on Norwich Quay in Lyttelton. Sections of reinforcing steel and other construction material have been laid up against the mural.
Perimeter Moment resisting steel frames (PMRSFs) are a commonly used seismic resisting system, placed around the perimeter of the building for maximum torsional stiffness. They are typically designed as “strong column weak beam” systems with fixed column bases. When subjected to severe earthquake demand, sufficient to push the beams into the inelastic range, it is expected that plastic hinging at the column bases will occur. However, the response of PMRSF systems to the severe 2010/2011 Christchurch earthquake series did not generate column base hinging in systems which exhibited beam yielding.