“Damage to Commercial Buildings from Wind, Storm...

MULTIDISCIPLINARY CENTER FOR EARTHQUAKE ENGINEERING RESEARCH

Examining Extreme Events: Hurricane Katrina’s Impacts – November 2, 2005

““Damage to Commercial Buildings Damage to Commercial Buildings from Wind, Storm Surge and Debrisfrom Wind, Storm Surge and Debris””

A Presentation by:Gilberto Mosqueda

Assistant Professor, Department of Civil Structural and Environmental Engineering, University at Buffalo

In collaboration with:Keith Porter

California Institute of Technology



Structural Damage Structural Damage InvestigationsInvestigations

Examine damage to large engineered structures, primarily bridges and commercial buildingsAssess structural damage from a multi-hazard perspectiveIdentify uses of seismic design principles to mitigate hurricane damage



Engineered BuildingsEngineered Buildings

Building structures investigated Schools HospitalsCasino hotelsApartment buildingsOffice buildingsParking structuresOthers



HospitalsHospitals

Singing River Hospital in Pascagoula remained operational with some nonstructural damage

WindowsEntrance canopy

Good performance appears largely due to good glazing



SchoolsSchoolsD’Iberville High School, north of Biloxi



University of Southern Mississippi University of Southern Mississippi Marine Education Center in BiloxiMarine Education Center in Biloxi



Buildings in Downtown Buildings in Downtown GulfportGulfport

Few structures collapsed




Most engineered buildings suffered only nonstructural damageBroken windows resulted in water damage at upper stories2-3 ft storm surge flooded first level




Blast-resistant building performed well -only 2 broken windows, but first story floodedMost buildings unoccupied -restoration under way



Gulfport Coastal HotelsGulfport Coastal HotelsSignificant nonstructural damage to exterior and interior



Gulfport Coastal HotelsGulfport Coastal Hotels



Damage to hurricaneDamage to hurricane--resistant buildings resistant buildings



Partial Collapse of Building Partial Collapse of Building Due to Barge ImpactDue to Barge Impact

Impact



Partial Collapse of Parking Partial Collapse of Parking Structure Due to Barge ImpactStructure Due to Barge Impact



Collapse of Parking Structures Collapse of Parking Structures Due to Storm SurgeDue to Storm Surge




Deck supports

Clip angles



Some parking structures Some parking structures performedperformed wellwell



Partial collapse of parking Partial collapse of parking structures in Biloxistructures in Biloxi

Partial collapse –storm surge

No structural damage

Partial collapse –impact



Glazing damage to downtown Glazing damage to downtown New Orleans office buildingsNew Orleans office buildings



Glazing damage at New Glazing damage at New Orleans Hyatt RegencyOrleans Hyatt Regency



Undamaged but unusableUndamaged but unusable……No potable waterNo potable water



Xavier University Flood Xavier University Flood DamageDamage



Preliminary Lessons LearnedPreliminary Lessons Learned

Structural damage observed was caused byFlooding and moldStorm surgeSurge-borne debris (casino barges)

Structural damage from storm surge occurred to concrete structures that were not adequately restrained

Precast concrete floors in parking structures Simply supported spans of bridge

Significant glazing damage occurred to structures that were downwind of gravel roofsMold may require demolition of thousands of New Orleans homes and buildings



MultihazardMultihazard aspectsaspects

Similar losses occur in earthquakes & hurricanesPrecast parking structures suffered similar damage during 1994 Northridge earthquake Seismic resistant details have been developed for precast construction and could be useful for storm surge resistant design

Photo Credit: Los Angeles Times

“Damage to Commercial Buildings from Wind, Storm...

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