SEISMIC VULNERABILITY AND PROTECTION OF NONSTRUCTURAL COMPONENTS T. T. SOONG and D. LOPEZ GARCIA SEISMIC VULNERABILITY AND PROTECTION OF NONSTRUCTURAL.

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Presentation transcript:

SEISMIC VULNERABILITY AND PROTECTION OF NONSTRUCTURAL COMPONENTS T. T. SOONG and D. LOPEZ GARCIA SEISMIC VULNERABILITY AND PROTECTION OF NONSTRUCTURAL COMPONENTS by T. T. SOONG and D. LOPEZ GARCIA DEPARTMENT OF CIVIL, STRUCTURAL & ENVIRONMENTAL ENGINEERING UNIVERSITY AT BUFFALO, STATE UNIVERSITY OF NEW YORK NCREE/JRC Workshop November 17-19, 2003

Examples of Nonstructural Components Architectural Partitions Piping Systems Ceilings Mechanical and Electrical Equipment Exterior Cladding Contents NCREE/JRC Workshop, November 17-19, 2003

Examples of Nonstructural Damage NCREE/JRC Workshop, November 17-19, 2003

Investments in Building Construction (Miranda) NCREE/JRC Workshop, November 17-19, 2003

Direct Economic Loss due to Building Damage 1994 Northridge Earthquake (Kircher, 2003) Total: $18.5 Billion Nonstructural Related: ~ 50% 1994 Northridge Earthquake (Kircher, 2003) (Non-residential Buildings) Total: $6.29 Billion Nonstructural Related: $5.20 Billion (83%) NCREE/JRC Workshop, November 17-19, 2003

Fatalities 1999 Kocaeli Earthquake (Petal, 2003) Total: 17,480 Nonstructural Related: ~ 550 (3%) 1999 Chi-Chi Earthquake (Soong et al, 2000) (at One Hospital) Total: 7 Nonstructural Related: 7 (100%) NCREE/JRC Workshop, November 17-19, 2003

Seismic Vulnerability Analysis Monte-Carlo Simulation Experience Data Experiments NCREE/JRC Workshop, November 17-19, 2003

Equipment with restraints NCREE/JRC Workshop, November 17-19, 2003 Anchor Bolts or Expansion Bolts Resistant straps, Braces, Tendons or Plumbers Tapes Spring Mounts or Isolators Tendons, Cables, Bungee Cords, Springs or Toggle Bars or Plumbers Tapes

Fragility curves for restraint breakage limit state (Lopez Garcia and Soong 2003) NCREE/JRC Workshop, November 17-19, 2003

Logic-tree diagram for a medical gas supply equipment (Yao, 1999) NCREE/JRC Workshop, November 17-19, 2003 Redundant Gas Supply Normal Gas supply O 2 NO Central System Individual Cylinder CylindersSupply Line Medical Gas Liquid Oxygen Tank By-pass valveSupply lineEvaporator N 2 (in cylinders)

Sample fragility of a water tank/pipeline nonstructural system (Grigoriu and Kafali, 2003) NCREE/JRC Workshop, November 17-19, 2003

Fragility tests of suspended ceiling systems and sample fragility data (Badillo et al, 2002) NCREE/JRC Workshop, November 17-19, 2003

Protection Strategies Improved Structural Performance Improved Nonstructural Performance Better Engineered Conventional Anchors Newer Technologies NCREE/JRC Workshop, November 17-19, 2003

Improved Structural Performance NCREE/JRC Workshop, November 17-19, 2003 Reduction in direct economic loss through improved building performance of non-residential buildings (adapted from Kircher, 2003)

Improved Nonstructural Performance Better Engineered Conventional Anchors NCREE/JRC Workshop, November 17-19, 2003

Improved Nonstructural Performance Better Engineered Conventional Anchors (continued)

NCREE/JRC Workshop, November 17-19, 2003 Comparison of expected earthquake loss before and after nonstructural strengthening (Gould and Griffin, 2003) Improved Nonstructural Performance Better Engineered Conventional Anchors (continued)

NCREE/JRC Workshop, November 17-19, 2003 Tapered metallic yielding device for brittle nonstructural components (Goodno, 2001) TMD for elevator (Rildova and Singh, 2003) Improved Nonstructural Performance Newer Technologies

NCREE/JRC Workshop, November 17-19, 2003 Wire rope isolator pipe restraint (Loziuk et al, 2003) Improved Nonstructural Performance Newer Technologies (continued)

NCREE/JRC Workshop, November 17-19, 2003 Semi-active device (Rana and Soong, 1998) Improved Nonstructural Performance Newer Technologies (continued)

International Collaboration (ATC-58, Draft Work Plan, ) Task 1:Develop a Catalog of Nonstructural Components, Systems and Contents Task 2:Identify Nonstructural Performance Measures Task 3:Identify Engineering Demand Parameters Task 4:Develop Damage Database Task 5:Establish Comprehensive Testing and Certification Protocols Task 6:Performance Evaluation Case Studies/Testbed Checks NCREE/JRC Workshop, November 17-19, 2003

Investments in Building Construction (Miranda) NCREE/JRC Workshop, November 17-19, 2003

Acknowledgements Multidisciplinary Center for Earthquake Engineering Research, Buffalo, NY, USA U.S. National Science Foundation NCREE/JRC Workshop, November 17-19, 2003