Keynote Address Tribute to Tom Paulay Session 3 Session 4A Session 4B Session 5A Session 5B Session 6 Session 7A Session 7B Session 8A Session 8B Poster Session 

A Nonlinear Static (Pushover) Procedure Consistent with New Zealand Standards

Barry Davidson

The Nonlinear Static Procedure, often used in the assessment of earthquake prone buildings is re-presented in a format consistent with current New Zealand Standards. An example demonstrates that results obtained from the proposed procedure are consistent with the intent of the Standards.

Paper P35: [Read]

Forensic Earthquake Engineering

R. Shepherd

Forensic engineering involves technical investigation of failures that may assist in the resolution of disputes. In this paper the scope of typical forensic earthquake engineering activities is reviewed, some representative cases are described and the lessons learned are summarised. Notwithstanding some limitations of the process, it is apparent that some significant benefits to the knowledge base can accrue from forensic investigations.

Paper P36: [Read]

Effect of Harmonic Excitation Sequences on Structures

Kimberley Twigden, Xiaoyang (Harry) Li, Majid Ali, Claudio Oyarzo-Vera and Nawawi Chouw

It is common that aftershocks can still occur several months after a severe earthquake. Some of these aftershocks can have intensity high enough to increase the damage that is generated by a previous main shock or in some cases they can generate damage in a structure which was apparently intact after the main event. This situation is also applicable to the cumulative effect of all earthquakes that a structure experiences throughout its life time. This work analyzes the response of structural members under a sequence of harmonic excitations, as a preliminary investigations. The results of this study will help in addressing the actual problem of earthquakes and aftershocks cumulative effects.

Coir fibre and rope reinforced concrete (CFRRC) columns were investigated under monotonic, cyclic and different harmonic loadings. Basic static properties of coir fibre reinforced concrete were also investigated using standard procedures. Load-displacement curves were obtained for monotonic and cyclic tests and the ductility of the specimen was calculated. Harmonic excitations were applied using a shake table. The change in dynamic properties of CFRRC columns was determined by an impact test after each ground motion excitation. A change in natural frequency is observed prior to the visible cracking of columns specimens. This shows that there is some non-visible material degradation in the specimen before cracking.

Paper P37: [Read]

Keynote Address Tribute to Tom Paulay Session 3 Session 4A Session 4B Session 5A Session 5B Session 6 Session 7A Session 7B Session 8A Session 8B Poster Session