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Lookup NU author(s): Professor Sean Wilkinson,
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The results of a series of non-linear response history analyses are presented. The non-linear model includes elasto-plastic behaviour of beam connections up to a critical moment where upon the connection ‘breaks ‘ and suffers irrecoverable loss of strength and stiffness. This corresponds to an extreme, idealized form of material degradation and when coupled with P-Delta effects, allows the complete collapse of the structures to be investigated. Three generic frames are subjected to seven earthquake excitations. Results were obtained for both the plastic limit (i.e. where all beams remain within their plastic range) and the collapse limit (where all beams exceed their ultimate capacity) and are presented in terms of number of storeys and ductility. The results show that significant reserve capacity is achievable even in structures with minimal ductility. The results are very dependant on the correspondence between the frequency content of the earthquake and the natural periods of the building and also the building configuration. Simple pushover analysis is not capable of predicting the collapse load of structure.
Author(s): Wilkinson SM, Hiley RA
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 13th World Conference on Earthquake Engineering
Year of Conference: 2004
Publisher: International Association for Earthquake Engineering (IAEE)
Notes: Paper number 929