Accounting for residual deformation and simple approaches to their mitigation (2006)
AuthorsPettinga, J.D., Pampanin, S., Christopoulos, C., Priestley, M.J.N.show all
Recent developments in performance-based seismic design and assessment approaches have emphasised the importance of properly assessing and limiting the residual (permanent) deformations, typically sustained by a structure after a seismic event, even when designed according to current code provisions. Recent investigations have led to a proposed Direct Displacement-Based Design (DDBD) approach which includes an explicit consideration of the expected residual deformations accounting for 2-dimensional and MDOF effects. Having estimated the possible residual deformations in a structure, it remains to implement specific design features to reduce them to an acceptable level. Previous studies have identified post-yield stiffness as being critical to residual deformation behaviour, therefore a series of simple approaches are proposed to increase this element and system parameter. These methods do not utilise re-centring post-tensioned technology. First, the effects of changes in material stress-strain behaviour and section design in the primary seismic-resisting system are considered, and then the design and introduction of a secondary elastic frame to act in parallel with the primary system is demonstrated. Using moment-curvature and non-linear time-history analyses, the proposed approaches are shown to be effective at achieving their intended goal of residual deformation reduction.
CitationPettinga, D., Pampanin, S., Christopoulos, C., Priestley, N. (2006) Accounting for residual deformation and simple approaches to their mitigation. Geneva, Switzerland: First European Conference on Earthquake Engineering and Seismology (ECEES), 3-8 Sep 2006. Paper 343.
This citation is automatically generated and may be unreliable. Use as a guide only.