“THE 2010 CHILE, Mw=8.8 EARTHQUAKE”

G. Rodolfo SARAGONIISCC Scientific Committee Member

Sergio RUIZINTERNATIONAL SEISMIC SAFETY CENTRE, NSNI/IAEA

CIRCUMPACIFIC SEISMICITY

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CIRCUMPACIFIC SUBDUCTION

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SUBDUCTION OF NAZCA PLATE UNDER SOUTH AMERICA PLATE

Placa SudamericanaPlaca de Nazca

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SUBDUCTION PLATE INTERACTION

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TYPES OF EARTHQUAKES

• INTERPLATE THRUST SUBDUCTION EARTHQUAKES(CHILE 2010 EARTHQUAKE)

• INTRAPLATE SUBDUCTION EARTHQUAKES

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• CORTICAL EARTHQUAKES (SUPERFICIAL RELATED WITH FAULTS)

• STRIKE SLIP FAULT DUE TO INTERPLATE INTERACTION (MAGALLANES FAGNANO FAULT)

LARGE SUBDUCTION EARTHQUAKES

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Mw = -0.089·T+0.134·V+7.96 TSUNAMISMw = -0.089·T+0.134·V+7.96 TSUNAMIS

COMPARISON CHILE AND CALIFORNIA EARTHQUAKES

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CHILE 2010 EARTHQUAKE Mw = 8.8

• RUPTURE ZONE LENGTH 450 Km

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CHILE 2010 EARTHQUAKEAFTERSHOCK AREA – YELLOW DOTS

USGS

MAIN ASPERITIES OF THE EARTHQUAKE

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• COSEISMIC DISPLACEMENT

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HUGE TSUNAMI

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RECORDED ACCELEROGRAMS

• MANY ACCELEROGRAMS RECORDED IN SANTIAGO AT GROUND LEVEL, HIGH RISE BUILDINGS, BRIDGES, ISOLATED BUILDINGS and METRO.

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BUILDINGS and METRO.• RECORDED ACCELEROGRAMS AT

GROUND LEVEL IN THE MOST DAMAGE CITIES

RECORDED ACCELEROGRAMS

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DAMAGE TO BUILDINGS

• THREE BUILDINGS COLLAPSED:ONE IN CONCEPCIONTWO IN SANTIAGO

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DAMAGE TO BUILDINGS

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DAMAGE TO BUILDINGS

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DAMAGE TO BUILDINGS

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DAMAGE TO BUILDINGS

• MOST BUILDINGS DESIGNED ACCORDING TO SEISMIC CHILEAN CODE Nch 433 “SEISMIC DESIGN OF BUILDINGS” PERFORMED WELL

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BUILDINGS” PERFORMED WELL WITHOUT COLLAPSE

DAMAGE TO BUILDINGS

• THERE ARE SOME HIGH RISE BUILDINGS WITH STRUCTURAL DAMAGE

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DAMAGE TO BRIDGES

• MOST OF THE BRIDGES DESIGNED ACCORDING TO CHILEAN CODE FOR BRIDGES PERFORMED WELL

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DAMAGE TO BRIDGES

• FEW BRIDGES DO NOT DESIGN ACCORDING TO CHILEAN CODE COLLAPSE

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SEISMIC PERFORMANCE OF RESEARCH NUCLEAR REACTOR

• CHILE HAS TWO RESEARCH NUCLEAR REACTORS IN SANTIAGO, BOTH PERFORMED WELL DURING THE EARTHQUAKE.

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EARTHQUAKE. • THE REACTORS ARE: • LA REINA IN OPERATION • LO AGUIRRE DISCONTINUED

RESEARCH NUCLEAR REACTOR LA REINA UNDAMAGED (PGA = 0.2 – 0.3 g)

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RESEARCH NUCLEAR REACTOR LA REINA UNDAMAGED (PGA = 0.2 – 0.3 g)

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RESEARCH NUCLEAR REACTOR LA REINA UNDAMAGED (PGA = 0.2 – 0.3 g)

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RESEARCH NUCLEAR REACTOR LA REINA UNDAMAGED (PGA = 0.2 – 0.3 g).

REACTOR BARS

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RESEARCH NUCLEAR REACTOR LA REINA UNDAMAGED (PGA = 0.2 – 0.3 g).

REACTOR BARS

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RESEARCH NUCLEAR REACTOR LA REINA UNDAMAGED (PGA = 0.2 – 0.3 g).

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RESEARCH NUCLEAR REACTOR LA REINA UNDAMAGED (PGA = 0.2 – 0.3 g).REACTOR BARS

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RESEARCH NUCLEAR REACTOR LA REINA UNDAMAGED (PGA = 0.2 – 0.3 g).

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RESEARCH NUCLEAR REACTOR LO AGUIRRE -SANTIAGO UNDAMAGED (PGA = 0.3 g).

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RESEARCH NUCLEAR REACTOR LO AGUIRRE - SANTIAGOUNDAMAGED (PGA = 0.3 g).INSPECTION MARCH 13, 2010

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RESEARCH NUCLEAR REACTOR LO AGUIRRE - SANTIAGOUNDAMAGED (PGA = 0.3 g).SMALL CRACK IN THE UPPER ANCHORAGE OF THE STACK

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RESEARCH NUCLEAR REACTOR LO AGUIRRE - SANTIAGOUNDAMAGED (PGA = 0.3 g).En celda de alta actividad sobre plataforma depiscina se observa cemento suelto en dos pernos

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REACTOR CELL LOOSE CONCRETE IN TWO ANCHOR BOLTS

RESEARCH NUCLEAR REACTOR LO AGUIRRE - SANTIAGOUNDAMAGED (PGA = 0.3 g).

CONNECTIONS BETWEEN MAIN AND SECONDARY BUILDINGS

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RESEARCH NUCLEAR REACTOR LO AGUIRRE - SANTIAGOUNDAMAGED (PGA = 0.3 g).CONNECTIONS BETWEEN MAIN AND SECONDARY BUILDINGS

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LOOSE CONCRETE IN ANCHOR BOLTS

CONCLUSIONS

• THE TWO RESEARCH NUCLEAR REACTORS IN SANTIAGO PERFORMED UNCRACKED FOR THE Mw=8.8 CHILEAN EARTHQUAKE.

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EARTHQUAKE.• THE PGA MEASURED IN SANTIAGO IN

STIFF SOIL WAS 0.2-0.3g

CONCLUSIONS

• MOST OF BRIDGES DESIGNED RECORDING TO CHILEAN CODE PERFORMED WELL

• IMPORTANT DAMAGE AND NUMBER OF

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• IMPORTANT DAMAGE AND NUMBER OF VICTIMS DUE TO TSUNAMI MOST OF ADOBE HOUSE PERFORMED WELL.

• THE EARTHQUAKE WAS RECORDED FOR MANY ACCELEROGRAMS

International Atomic Energy Agency

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Thank you for your attention