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Research papers, University of Canterbury Library

It is fast becoming common practice for civil engineering infrastructure and building structures to be designed to achieve a set of performance objectives. To do so, consideration is now being given to systems capable of sustaining minimal damage after an earthquake while still being cost competitive. This has led to the development of high performance seismic resisting systems, followed by advances in design methodologies. The paper presents the experimental response of four pre-cast, post-tensioned rocking walls with high-performing dissipating solutions tested on the shake-table at the University of Canterbury. The wall systems were designed as a retrofit solution for an existing frame building however, can also be used for the design of new, high-performance structures. The use of externally mounted dampers allowed numerous dissipation schemes to be explored including mild-steel dampers (hysteretic dampers), viscous dampers, a combination of both or no dampers. The advantages of both velocity and displacement dependant dissipation was investigated for protection against strong ground motions with differing rupture characteristics i.e. far-field and near-field events. The experimental results are used to verify a proposed design procedure for post-tensioned rocking systems with supplementary hysteretic and viscous dissipation. The predicted response compared well with the measured shake-table response.

Images, eqnz.chch.2010

I could have sworn the street lamposts were vertical on Friday 3 September 2010! Magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

I could have sworn the street lamposts were vertical on Friday 3 September 2010! Magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

I could have sworn the street lamposts were vertical on Friday 3 September 2010! Magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Shop parapet toppled in the magnitude 7 earthquake in Christchurch on Saturday 4-9-2010. This building was condemned and demolished on 9 September 2010.

Images, eqnz.chch.2010

I could have sworn the street lamposts were vertical on Friday 3 September 2010! Magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

I could have sworn the street lamposts were vertical on Friday 3 September 2010! Magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

I could have sworn the street lamposts were vertical on Friday 3 September 2010! Magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

I could have sworn the street lamposts were vertical on Friday 3 September 2010! Magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Rescue services out in full force at the Christchurch Arts Centre following the magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Quake-damaged shops on Manchester Street; aftermath of the magnitude 7.1 earthquake that struck Christchurch on Saturday 3 September 2010.

Images, eqnz.chch.2010

Quake-damaged shops on Manchester Street; aftermath of the magnitude 7.1 earthquake that struck Christchurch on Saturday 3 September 2010.

Images, eqnz.chch.2010

I could have sworn the street lamposts were vertical on Friday 3 September 2010! Magnitude 7 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

The huge tremor shook the masonry gable off this apartment block in the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

The gable disappeared off the roof of this church following the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Another shop verandah taken down by falling parapet during the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

This 2 storey building has been condemned after its roof collapsed during the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

Another home struck off Santa's Christmas delivery list; aftermath of a magnitude 7.1 earthquake that struck Christchurch on 4 September 2010.

Images, eqnz.chch.2010

This house along Bealey Ave lost its chimney stack in the magnitude 7.1 earthquake that struck Christchurch on Saturday 4 September 2010.

Images, eqnz.chch.2010

Repairs in progress on this High Street shop; aftermath of the magnitude 7.1 earthquake that struck Christchurch on Saturday 4 September 2010.

Images, eqnz.chch.2010

This 2 storey building has been condemned after its roof collapsed during the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

These diggers finished off what the quake failed to completely destroy; aftermath of the magnitude 7.1 earthquake that struck Christchurch on Saturday 4 September 2010.

Images, eqnz.chch.2010

Quake-damaged shops on Manchester Street; aftermath of the magnitude 7.1 earthquake that struck Christchurch on Saturday 3 September 2010.

Images, eqnz.chch.2010

Cross cracks in the brick wall of St Elmo Courts apartment block at the Hereford Street / Montreal Street intersection.

Images, eqnz.chch.2010

Shop parapet toppled in the magnitude 7 earthquake in Christchurch on Saturday 4-9-2010. This building was condemned and demolished on 9 September 2010.

Images, eqnz.chch.2010

Another shop verandah taken down by falling parapet during the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.

Images, eqnz.chch.2010

The Westpac building suffered damage at its beam / column joints during the magnitude 7.1 earthquake that struck Christchurch on Saturday 4 September 2010.

Images, eqnz.chch.2010

Quake-damaged shops on Manchester Street; aftermath of the magnitude 7.1 earthquake that struck Christchurch on Saturday 3 September 2010.

Images, eqnz.chch.2010

The huge tremor shook the masonry gable off this apartment block in the magnitude 7.1 earthquake in Christchurch on Saturday 4-9-2010.