CHRISTCHURCH EARTHQUAKE€¦ · Natural Disasters – The Christchurch Earthquakes • The world...

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Natural Disasters –Manageable or Measurable?

Adam Thornton

Wednesday, 05 October 2011, 13.15 – 14.00

CHRISTCHURCH EARTHQUAKE

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2011 Natural Disasters – The Christchurch Earthquakes

FIDIC 2011 CONFERENCE

SPECIAL PENARY – NATURAL DISASTERS

CHRISTCHURCH EARTHQUAKE

Presented by: Adam Thornton (New Zealand)FIDIC EC

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CONTENTS

Technical Report on Christchurch Feb22 Quake

Role of the Consulting Engineer Post Event

FIDIC Disaster Management Guide

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Christchurch the Un-luckiest City?■ Small total energy release but extremely high Peak

Ground Accelerations (PGAs)■ Epicenter shallow and close to CBD■ Faults previously unknown■ Sub-ground features accelerated the PGAs

Magnitude 6.3 (800 times smaller than Japan)PGAs 1.9g (4 times higher than Japan [on land] )Duration 12-20 seconds180 deaths

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Three types of hazards generated:

• Rock Falls

• Liquefaction

• Structural Damage

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Rock fa

lls

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Liqu

efaction

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Liquefaction

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Liqu

efaction

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Liquefaction

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Structural dam

age

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180 DeathsEntire residential suburbs abandoned (12000 homes)1000 CBD buildings demolished (40%)Major re‐build of in‐ground infrastructureNZ$15‐20B repair cost (8‐10% GDP)Ongoing insurance in Christchurch unavailable (Temporarily)Insurance rates in other NZ Seismic Zones increasing by between 200‐1000%

Outcomes

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The Role of the Consulting Engineer Post Disaster

Immediate (Rescue) Phase

Ongoing (Recovery) Phase

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Well organised CD&EM serviceEffectively no public sector engineersSafety/Damage evaluation roles carried out by Consulting (Structural/Civil) Engineers and their senior employeesNo liability when working under instruction from the Emergency ControllerConsulting Engineers concurrently assessed clients properties, typically with pre‐existing priority arrangements

Immediate Phase

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11. The Engineer is protected from liability under Section 110 of the Civil Defence Emergency Management Act 2002 in respect to his or her services carried out under the direction of the Civil Defence Emergency Management Controller, including liability for Health and Safety.

12. The Engineer shall not be considered liable for any loss or damage resulting from any occurrence during the period where the services are undertaken under the direction of the Civil Defence Emergency Management Controller.

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Business as usual!

Recovery Phase

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FIDIC – Disaster Management Guide

CONTENTS (Draft)

IntroductionPre-disaster PreparednessDM issues during the event and in the immediate aftermathDM issues In the short term recovery phaseDM issues in the longer term recovery and reconstruction phase

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• The frequency of catastrophic disasters appears to be increasing all around the world.

• Increasing world population is leading to dense occupation levels in more marginal habitats.

• These issues combined with modern high speed communication is increasing both the perceived and real impact of disasters on mankind and the built environment.

• Disasters both man-made and natural, some apparently made worse as a result of climate change due to global warming, are resulting in human tragedy and enormous financial losses.

FIDIC – Disaster Management GuideIntroduction ‐ Draft

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• The world media are regularly bringing us reports of hurricanes and typhoons, floods, mudslides, forest fires, tornadoes, volcano eruptions, and large-scale oil spills, not to mention earthquakes and tsunami, nuclear leakage, mass contaminations and poisonings, war and insurrection.

• The extent of damage potential to infrastructure and to the built-environment appears to be increasing exponentially and along with it, the role of engineers in emergency management, assessment, retrofit and reconstruction.


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• Increasingly these roles are filled by private sector engineers – consultants and their employees. Thus there is a need for FIDIC, its regional groupings, it’s Member Associations and it’s member firms to be prepared for future emergencies so that their efforts, following a disaster can be of optimum value.

• It is intended that the guide will provide best practice advice to Members Associations and their member firms, their clients and civil defence/emergency management authorities, both local and national.


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Presented by: Adam Thornton (New Zealand)FIDIC EC

CHRISTCHURCH EARTHQUAKE€¦ · Natural Disasters – The Christchurch Earthquakes • The world...

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