SEISMIC RISK STUDY （English version）

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1、REPORTONSEISMICRISKSTUDYANDDEFINITIONOFDESIGNSPECTRUMFORTHERMALPOWERPLANTINCORONEL(PUNTAPUCHOCOANDPORTSITES)(Rev.1)TABLEOFCONTENTS1INTRODUCTION32SEISMICTHREATSTUDY32.1MicroZoningandSeismicity42.1.1IdentificationofSeismicSources52.1.2MicroZoningorDiscretization62.2ProbabilisticAnalysisModel92.2.

2、1OccurrenceModeling92.2.2Frequency/MagnitudeRatio102.2.3SpreadandAttenuationFeatures122.2.4IntegratedProbabilisticModel132.2.5DesignPhilosoply132.3ProbabilisticAnalysisOutcomes142.4HistoricalSeismicity/DeterministicStudy163DESIGNSPECTRUMDEFINITION203.1SoilMechanicsData203.2SeismicDesignSpectrum

3、214BIBLIOGRAPHY25ANNEXASEISMICCATALOG,SEISMICCATALOG,GEOPHYSICSDEPARTMENT,PARTAMENTODEGEOFÍSICAUNIVERSIDADDECHILE.27INCOSTASCHILES.A.REV.134de3327-03-06ANNEXB:SEISMICCATALOG,USGS31INCOSTASCHILES.A.REV.134de3327-03-061.INTRODUCTIONColbúnS.A.iscurrentlystudyingthedevelopmentofaninvestmenttoinstal

4、lafutureconventionalThermalPowerPlant(CTCO)thatusethecoalastheprimaryfuelforageneratingcapacityofapprox.350MWgrosstosupplyenergytotheChileanElectricPowerGrid(SIC).ColbúnhasestablishedtheplantlocationatBahíadeCoronel,coastoftheVIIIRegion.Consequently,aspartofthebasiclocalconditionstudiesnecessar

5、yforthedevelopmentoftheEngineering,ColbúnhascommissionedINCOSTASthepreparationoftheseismicriskstudyandthedefinitionofadesignspectrum.ThisreportprovidesaseismicriskstudyvalidfortwositesintheareaofBahíadeCoronel,locatedsome30kmtothesouthfromConcepción.ThefirstsiteisPuntaPuchoco,locatedtoasideofth

6、ecurrentport“Jureles”,atcoordinates37.07ºSand73.17ºW.Theothersiteislocatedinthesamebay,atadistanceofaround4-5km,inthesectorofPortCoronel,atcoordinates37.03ºSand73.14ºW.Thestudyconsistsoftwomainparts.Thefirstonecoverstheseismicthreatstudybasedonthemaximumhorizontalsoilaccelerationexpectableinthe

7、siteforacertainlevelofdesigndefinedinprinciple(Probabilityofexceedanceatagiventimeinterval).Thesecondpartincludesthedesignspectrumproposedonthebasisofthesoilproperties.Thestudyalsoprovidesthewaystomodifythespectruminaccordancewith