over 220,000 fatalities over 300,000 homes damage/destroyed over 1.5 m people affected
DESCRIPTION
The Role of Building Codes in Delivering Seismic Performance John Hooper Director of Earthquake Engineering Magnusson Klemencic Associates. Over 220,000 fatalities Over 300,000 homes damage/destroyed Over 1.5 M people affected No Building Codes. M W 7.0. Under 500 fatalities - PowerPoint PPT PresentationTRANSCRIPT
The Role of Building Codes in Delivering Seismic Performance
John HooperDirector of Earthquake EngineeringMagnusson Klemencic Associates
• Over 220,000 fatalities
• Over 300,000 homes damage/destroyed
• Over 1.5 M people affected
• No Building CodesMW 7.0
MW 8.8
• Under 500 fatalities
• Displaced population: 800,000
• Estimated damage: $30B US
• Building Codes Similar to US
Performance of Chilean Buildings Post 1985
Buildings that collapsed: 4 (approximately) Buildings to be demolished: 50 (estimated) Number of buildings 3+ stories: 9,974 Number of buildings 9+ stories: 1,939 Failures of 3+ stories: 0.5% Failures of 9+ stories: 2.8%
Life Safety Performance
Life Safety Performance
SDC A SDC B SDC C SDC D SDC D SDC D SDC E
1-Second RTE (MCE Spectral Response Acceleration, SR1 (%g)Seismic Design Category for Site Class DSeismic Design Codes – based on USGS National Seismic Hazard Map
Summary
Building Codes (and their enforcement) make a difference
Continued Code updates are essential Analysis Physical Research Earthquake Reconnaissance
Is Life Safety Performance adequate?