University of Auckland Centre for Earthquake Engineering Research


Pounding of structures

Pounding damage to structures observed in earthquakes confirmed the urgent need for cost-effective, reliable retrofit and mitigation solutions. The objective is to evaluate pounding damage and develop measures to prevent pounding. The interrelation between the characteristics of structures, soil and earthquake excitations with respect to pounding damage will be investigated.

Relative movement effect on bridges in NZ earthquakes


N Chouw, J Butterworth

In the case of bridge structures the interaction between the bridge piers, girders and abutments and the surrounding soil is essential. Since the gap between bridge abutment and the adjacent girders and the distance between neighbouring girders are normally only a few centimetres, the closing relative movements between the adjacent structural members cause pounding-induced damage to the structure.

The goal of this research is to investigate the seismic performance of structures including the interaction between the structural members.

The outcomes of this research will provide recommendations to practical bridge designers for a more holistic seismic design of bridges, which are not considered in the current bridge design manual.

 
 

Pounding of buildings in a row


N Chouw

Building damage observed in Gisborne and Christchurch proves the urgent need for cost-effective and reliable solutions for retrofitting buildings and mitigating pounding damage.

The goal of this project is to evaluate pounding damage and develop measures to avoid pounding of buildings with insufficient or no separation. To achieve this objective the forces activated in scale model buildings due to Christchurch ground motions will be investigated using a shake table and verified by numerical analysis. The interrelation between the characteristics of structures, soil and ground excitations with respect to pounding damage will be evaluated.

The measures developed will also be suitable for use for retrofitting existing buildings.

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