introduction to earthquake engineering - uni-kassel.de · dorka | introduction to earthquake...
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Introduction to
Earthquake Engineering
Urban Seismic Challenges
Prof. Dr.-Ing. Uwe E. Dorka
Stand: September 2013
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2 steps to urban seismic safety
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 2
1. Assessment:
– Earthquake hazard
– Vulnerability
– Human impact
2. Mitigation:
– Improve urban seismic robustness and resilience
– Improve response of society
Example: Istanbul metropolitan area
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Example: Istanbul metropolitan area
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 3
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 4
Example: Istanbul metropolitan area
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 5
Example: Istanbul metropolitan area
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 6
Urban growth of Istanbul
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 7
Assessment
• Earthquake Hazard:
– Tectonics (regional system of fault lines, possible and probable
movements)
– Seismic history (locations, magnitude and frequency of past
earthquakes)
– Soil conditions (local magnification effects, liquefaction potential)
– Topography (land slide potential, tsunamis, coastal subsidence)
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 8
Tectonics and seismic history
– North Anatolian fault line with recent earthquake history
– Possible and probable movements
Scenario event
Mw = 7.5
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 9
Assessment
• Earthquake Hazard:
– Tectonics (regional system of fault lines, possible and probable
movements)
– Seismic history (locations, magnitude and frequency of past
earthquakes)
– Soil conditions (local magnification effects, liquefaction potential)
– Topography (land slide potential, tsunamis, coastal subsidence)
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 10
Soil Conditions
– local magnification effects
– liquefaction potential
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 11
Assessment
• Earthquake Hazard:
– Tectonics (regional system of fault lines, possible and probable
movements)
– Seismic history (locations, magnitude and frequency of past
earthquakes)
– Soil conditions (local magnification effects, liquefaction potential)
– Topography (land slide potential, tsunamis, coastal subsidence)
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 12
Topography
– Limited land slides
– Coastal subsidence may be a bigger problem!
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Earthquake Hazard Assessment
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 13
– Leads to spectral acceleration maps for different return periods of anticipated seismic events
– Allows the construction of site specific response spectra for an event
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Assessment
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 14
• Vulnerability:
– Buildings (residential, administrative, educational, commercial, health, historical)
– Transportation infrastructure (roads, railroads, bridges, waterways and harbors, airports)
– Other life lines (water, waste water, electricity, gas)
– Regular industry (SMEs, large manufactures)
– Industry with large hazard potential (chemical, petrochemical, nuclear)
– Economy (business interruptions, short and long-term market impact, financial market reaction)
– Environment (industrial spills, waste water spills)
– Post-quake fires
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Buildings
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 15
– Multi-stage vulnerability assessment
– Collapses
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 16
– Multi-stage vulnerability assessment
– Heavy damage
Buildings
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Assessment
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 17
• Vulnerability:
– Buildings (residential, administrative, educational, commercial, health, historical)
– Transportation infrastructure (roads, railroads, bridges, waterways and harbors, airports)
– Other life lines (water, waste water, electricity, gas)
– Regular industry (SMEs, large manufactures)
– Industry with large hazard potential (chemical, petrochemical, nuclear)
– Economy (business interruptions, short and long-term market impact, financial market reaction)
– Environment (industrial spills, waste water spills)
– Post-quake fires
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Transportation infrastructure
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 18
– Evaluated highway bridges
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 19
Transportation infrastructure
– Evaluated highway bridges
– Recommended for retrofit
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Assessment
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 20
• Vulnerability:
– Buildings (residential, administrative, educational, commercial, health, historical)
– Transportation infrastructure (roads, railroads, bridges, waterways and harbors, airports)
– Other life lines (water, waste water, electricity, gas)
– Regular industry (SMEs, large manufactures)
– Industry with large hazard potential (chemical, petrochemical, nuclear)
– Economy (business interruptions, short and long-term market impact, financial market reaction)
– Environment (industrial spills, waste water spills)
– Post-quake fires
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Other life lines
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– Drinking water system
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 22
Other life lines
– Waste water system
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 23
Other life lines
– Electricity
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 24
Other life lines
– Gas
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Assessment
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 25
• Vulnerability:
– Buildings (residential, administrative, educational, commercial, health, historical)
– Transportation infrastructure (roads, railroads, bridges, waterways and harbors, airports)
– Other life lines (water, waste water, electricity, gas)
– Regular industry (SMEs, large manufactures)
– Industry with large hazard potential (chemical, petrochemical, nuclear)
– Economy (business interruptions, short and long-term market impact, financial market reaction)
– Environment (industrial spills, waste water spills)
– Post-quake fires
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Industries
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 26
– SMEs
Nr. Sectors
1 mining, construction,
ceramics, glass
2 commercial, food &
beverage
3 textile, leather
4 wood & furniture,
agriculture
5 chemical & petroleum
6 metals
7 machinery, automotive
8 transport & telecom
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 27
Equipment &
machinery Stock Business
Interruption
Nr. Sectors IX VIII IX VIII IX VIII
1 mining, construction,
ceramics, glass
0.011 0.013 0.011 0.013 0.075 0.025
2 commercial, food &
beverage
0.009 0.011 0.009 0.011 0.075 0.025
3 textile, leather 0.013 0.017 0.039 0.050 0.30 0.20
4 wood & furniture,
agriculture
0.016 0.012 0.016 0.012 0.075 0.025
5 chemical &
petroleum
0.033 0.035 0.033 0.035 0.50 0.30
6 metals 0.002 0.002 0.002 0.002 0.075 0.025
7 machinery,
automotive
0.002 0.002 0.002 0.002 0.15 0.1
8 transport & telecom 0.012 0.014 0.002 0.003 0.075 0.025
Industries
– SME sector losses
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 28
• Industries: – Large industries
Industries
– large
A1 Port, tanks, chimneys, power
generation, hazardous
A2 Tanks, steel mill, power
generation, waste water
treatment, industrial park
A3 Port, cranes
A4 Port, cranes
E1 Port, cranes, hazardous
E2 LNG tanks, port, hazardous
E3 Textile production,
industrial park
E4 Industrial park
E5 Industrial park
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Assessment
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 29
• Vulnerability:
– Buildings (residential, administrative, educational, commercial, health, historical)
– Transportation infrastructure (roads, railroads, bridges, waterways and harbors, airports)
– Other life lines (water, waste water, electricity, gas)
– Regular industry (SMEs, large manufactures)
– Industry with large hazard potential (chemical, petrochemical, nuclear)
– Economy (business interruptions, short and long-term market impact, financial market reaction)
– Environment (industrial spills, waste water spills)
– Post-quake fires
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 30
• Human Impact:
– Health (deaths and injuries, emergency care, threat of epidemics, long-
term care, psychological care)
– Basic needs (housing, food, water, clothing, sanitation, cooking fuel,
heating)
– Emergency Administration (emergency management, security,
preparedness of civil protection agencies and units, role of NGOs)
Assessment
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Health
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 31
– Deaths
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 32
Health
– Hospitals
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 33
• Human Impact:
– Health (deaths and injuries, emergency care, threat of epidemics, long-
term care, psychological care)
– Basic needs (housing, food, water, clothing, sanitation, cooking fuel,
heating)
– Emergency Administration (emergency management, security,
preparedness of civil protection agencies and units, role of NGOs)
Assessment
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Basic needs
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 34
– Required emergency shelter
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 35
• Human Impact:
– Health (deaths and injuries, emergency care, threat of epidemics, long-
term care, psychological care)
– Basic needs (housing, food, water, clothing, sanitation, cooking fuel,
heating)
– Emergency Administration (emergency management, security,
preparedness of civil protection agencies and units, role of NGOs)
Assessment
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Preparedness for civil protection
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 36
– Blocked access
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Mitigation
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 37
• Improve Urban Seismic Robustness and Resilience:
– Structural improvements of buildings (occupant friendly retrofitting by
strengthening or seismic control, re-building with seismically robust
systems)
– Urban re-vitalization (multiple emergency access to districts, emergency
relieve areas, redundancy of transportation and other lifeline systems,
restricting building height and building area to ground ratio)
– Industry (SME eq-mitigation and insurance programs through SME-
organizations, industrial earthquake emergency fund, requirement for
seismic action plan of large industries)
– Eliminate large environmental hazards (individual worst case scenarios,
containment of possible hazardous spills)
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Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 38
Mitigation
• Improve Response of Society:
– Education of general public about local earthquake risks
– Emergency response (equipment and training of civil protection agencies and units, stocks of basic supplies, temporary care centers, emergency management structure)
– Health care (base isolated hospitals with appropriate emergency care centers)
– Social preparedness (individual earthquake insurance, earthquake improvement fund for low-income housing)
– Activate market forces (voluntary seismic safety certificates)
– Innovative financing tools (securitization of earthquake risk through CAT bonds, Real Estate Investment Trust)
– Develop disaster prevention plan (vulnerability reduction plan)
– Legal framework and enforcement (building and zoning regulations, empowerment of control agencies, migration control, emergency laws, financial regulations)
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References
Prof. Dr.-Ing. Dorka | Introduction to Earthquake Engineering 39
(1) Metropolitan Municipality of Istanbul
(2003) Earthquake Master Plan for
Istanbul
(2) JICA report (2002). The Study on a
Disaster Prevention/Mitigation Basic
Plan in Istanbul Including Seismic
Microzonation in the Republic of
Turkey
(3) Google Earth
(4) Applied Technology Council (ATC):
ATC-13 (1985) Earthquake Damage
Evaluation Data for California, ATC-
25 (1991) Seismic Vulnerability and
Impact of Disruption of Lifelines in the
Conterminous United States,
Redwood City, CA.
(5) HAZUS (1999) Earthquake Loss
Estimation Methodology, Technical
Manual, RMS, NIBS and FEMA
Washington DC