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7/27/2019 Intelligent Structures
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Earthquake Engineering
Ahmed ElgamalProfessor, Department of Structural Engineering
University of California, San Diego
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Earthquake Damage
Chi-Chi, Taiwan Earthquake
(From Uang, Elgamal, Li, and Chou, UCSD, SE Dept, report No. SSRP-99/17
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1999 Chi-Chi, Taiwan Earthquake
(From Uang, Elgamal, Li, and Chou, UCSD, SE Dept, report No. SSRP-99/17
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(From Uang, Elgamal, Li, and Chou, UCSD, SE Dept, report No. SSRP-99/17
1999 Chi-Chi, Taiwan Earthquake
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Chi-Chi, Taiwan Earthquake
(From Uang, Elgamal, Li, and Chou, UCSD, SE Dept, report No. SSRP-99/17
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1999 Chi-Chi, Taiwan Earthquake
(From Uang, Elgamal, Li, and Chou, UCSD, SE Dept, report No. SSRP-99/17
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1999 Chi-Chi, Taiwan Earthquake
(From Uang, Elgamal, Li, and Chou, UCSD, SE Dept, report No. SSRP-99/17
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From: http://articles.architectjaved.com/earthquake_resistant_structures/building-
construction-materials-for-earthquake-resistance/
Concept of Ductility in Earthquake Resistant Design
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Research on Composite Wraps and Steel Jackets to increase column ductility
(Testing conducted at Univ. of California, San Diego, Structural Engineering Powell Labs)
Concept of Ductility in Earthquake Resistant Design
(Reseach by Priestley, Seible, and Hegemier)
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Steel connections research aimed at allowing
stress concentrations to occur at locations of
higher ductility (UC San Diego, Dept of Structural
Eng, Prof. C-M Uang).
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Active Control
Active Tuned Mass Dampers
Active Tuned Liquid Dampers
MR Dampers
Active Stiffness System
Shape Memory Alloys
Interacting Buildings
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http://www.ce.tuiasi.ro/~fideliu/ad/ee/Lectures/Earthquake%20Engineering/5%20New%2
0Trends%20in%20Earthquake%20Engineering.pdf
CHAPTER 5
New Trends in
EarthquakeEngineering.
Passive and
Active Control
(Prof.dr.ing.
Fideliu Păuleţ-
Crăiniceanu)
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Tuned Mass Dampers
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AMD = Active Mass Damper
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From Publication by Alessandro Martelli and Massimo Forni
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Active control with TMD
Fig. 7: Schematic of Active Masss Damper (AMD) applied to building(TMD = Tuned Mass Damper)
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AMD=Active Mass Damper
http //commons ikimedia org/ iki/File Taip
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Taipei 101, Taiwan
http://commons.wikimedia.org/wiki/File:Taip
ei_101_Tuned_Mass_Damper.png
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Active control with Active TMD
Active Mass Damoer (AMD) on
Kyobashi Seiwa building
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AMD = Active Mass Damper
From Publication by Alessandro Martelli and Massimo Forni
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HMD = Hybrid Mass Damper, TMD = Tuned Mass Damper, AMD = Active Mass Damper
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TAD = Tuned Active Damper
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TLD = Tuned Liquid Damper
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TSD = Tuned Sloshing Damper
Tuned Liquid Column Damper with Period Adjustment
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Tuned Liquid Column Damper with Period Adjustment
Impact Dampers
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HCD = Hanging Chain Damper
Impact Dampers
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MR Fluid Dampers
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Sh M All (SMA)
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Shape Memory Alloys (SMA)
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Interacting Buildings
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Active Variable Stiffness
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Active Control with Tendons
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Personal Safety Pod
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Personal Safety Pod
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Base Isolation (BI)
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Base Isolation (BI)
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From Publication by Alessandro Martelli and Massimo Forni
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From Publication by Alessandro Martelli and Massimo Forni
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81
Connecting Steel Plate
Rubber
Internal Steel Plate
Lead Plugs
Lead Plug (provides increased damping)
Rubber
Cover
Steel Plate
Lead Rubber Bearings
Prepared from Dr. Gianmario Benzoni’s SE207 Base Isolation Course Notes at UC San Diego
Steel plates distribute shear forces to the lead core.
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From Publication by Alessandro Martelli and Massimo Forni
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Coronado Bridge (San Diego, CA)
Seismic Retrofit of the Coronado Bay Bridge
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Lead Rubber Bearings (Base Isolation system), San Diego, CA
Schematic of Seismic Response Modification Deviced(SRMD) Test System
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(S ) est Syste
(University of California, San Diego)
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UC San Diego SRMD Base Isolator Experiment (Benzoni, Seible)
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Seismic Isolation and Energy Dissipation
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Seismic Isolation and Energy Dissipation
From Publication by Alessandro Martelli and Massimo Forni
Seismic Isolation and Energy Dissipation (32 LDRBs and LBRs)
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From Publication by Alessandro Martelli and Massimo Forni
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LDRB = Low Damping Rubber Bearing
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NB = Neoprene Bearing (GAPEC System, French kind of a RB
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From Publication by Alessandro Martelli and Massimo Forni
Friction Pendulum (Sliding System)
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110
Articulated
Slider
Self Lubricating
Liner
Cover Housing Plate
Concave
Plate
Windlock
AssemblyStainless Steel OverlayPrepared from Dr. Gianmario Benzoni’s SE207 Base Isolation Course Notes at UC San Diego
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Friction Pendulum Base Isolator at UC San Diego Powell Laboratory
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Friction Pendulum Base Isolator at UC San Diego Powell Laboratory
SRMD Testing Facility (Benzoni, Seible)
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System Integration to prevent un-seating
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Rocking of Foudnations
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JOURNAL OF STRUCTURAL ENGINEERING © ASCE / JUNE 2004 / 895
Rocking of Foundations
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http://web.mit.edu/istgroup/ist/documents/earthquake/Part5.pdf
Energy Dissipation Devices
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Energy Dissipation Devices
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Buckling Restrained Braces (BRBs)
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http://jiano.typepad.com/photos/uncategorized/brb_02.jpg
Viscous Dampers
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From Publication by Alessandro Martelli and Massimo Forni
Sacrificial Energy Dissipation Elements
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Sacrificial Shear Key
New San Francisco-Oakland Bay Bridge
Research at UC San Diego to test Sacrificial Shear Key (Uang, Seible)
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Research at UC San Diego (Uang, Seible)
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Full-scale testing of links at the Powell
Structural Research Laboratory.
Research at UC San Diego (Uang, Seible)
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Research at UC San Diego (Uang, Seible)
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Research at UC San Diego (Uang, Seible)
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Research at UC San Diego (Uang, Seible)
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g ( g )
Research at UC San Diego (Uang, Seible)
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Powell Structural Systems
Large Scale Experimental Research at UC San Diego Powell Laboratory
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Laboratory
Seismic Repair and Retrofit of BuildingsLarge Scale Experimental Research at UC San Diego Powell Laboratory
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TCCMAR Building Test 1st Story Damage
500 Instruments15 km (50,000 ft) of cables
Large Scale Experimental Research at UC San Diego Englekirk Center
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Shake-Table Large Scale Experimental Research at UC San Diego Englekirk Center Elgamal, Uang. Luco, Conte)
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