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  1. Performance-Based Design of Seismically Isolated Bridges

    17 Oct 2014 | Publications | Contributor(s): Eric L. Anderson

    The response of simple isolated bridge overcrossings to a variety of multi-dimensionalearthquake inputs was investigated by analysis and experiment. These studies wereundertaken as part of the Protective Systems Research Program at UC Berkeley sponsoredby the California Department of...

  2. Seismic Performance of Sliding Contents in Base-Isolated Buildings

    15 May 2014 | Publications | Contributor(s): Dimitrios Konstantinidis, Farzad Nikfar

    Sliding Response Analysis of Equipment in Base Isolated BuildingsDimitrios Konstantinidis, Farzad NikfarSliding of building objects, such as equipment, is of primary concern during an earthquake because it can contribute to substantial losses. This paper investigates the dynamics of equipment in...

  3. Seismic Isolation of 200 Year Old Heritage Cathedrals in Haiti

    15 May 2014 | Publications | Contributor(s): H Kit Miyamoto, Amir Gilani, Akira Wada, Devis Sonda

    Seismic evaluation and retrofit of heritage buildings using seismic isolation and structural intervention based on advanced analysisHistoric and heritage building present a unique class of structures. These buildings form a cultural pillar of the communities and thus require preservation....

  4. APPLICATIONS OF SEISMIC DAMPERS TO SPECIAL MOMENT FRAMES

    15 May 2014 | Publications | Contributor(s): Amir Gilani, H Kit Miyamoto

    Seismic dampers, enhanced perfromanced, superior long term perfromance and reduced collpase riskH Kit Miyamoto, Amir GilaniThe application of seismic protection devices such as dampers has fundamentally altered the landscape of earthquake engineering and design. Structures designed and built...

  5. Nonlinear Rooftop Tuned Mass Damper Frame

    15 May 2014 | Publications | Contributor(s): Jerod Johnson, Chris Pantelides, Lawrence Reaveley

    Nonlinear Rooftop Tuned Mass Damper FrameJerod Johnson, Chris Pantelides, Lawrence ReaveleyInnovative strategies driven toward improving the structural and nonstructural performance of existing buildings during large earthquakes are of paramount interest for researchers and practitioners of...

  6. Experimental Study on Basic Characteristics and Fatigue Properties of Lead Damper for Seismic Isolation System

    15 May 2014 | Publications | Contributor(s): Keiko Morita, Mineo Takayama, Akira Yasunaga

    Experimental Study on Basic Characteristics and Fatigue Properties of Lead Damper for Seismic Isolation SystemKeiko Morita, Akira Yasunaga, Mineo TakayamaIn order to protect buildings and inner important facilities from damage caused by earthquakes, base Isolation system has been developed. In...

  7. CYCLIC TESTING OF STEEL-CORE BUCKLING-RESTRAINED BRACES (BRBs) HAVING SIMPLE END DETAILS AND INFILLED WITH HIGH STRENGTH GROUT

    15 May 2014 | Publications | Contributor(s): Cigdem Avci Karatas, Oguz C. Celik

    CYCLIC TESTING OF STEEL-CORE BUCKLING RESTRAINED BRACES (BRBs) HAVING SIMPLE END DETAILS AND INFILLED WITH HIGH STRENGTH GROUTIntense research is being done in the field of Buckling Restrained Brace (BRB) technology to seek more cost effective and reliable solutions. To investigate performance...

  8. Performance of Triple-Pendulum Bearings Observed in a Full-Scale Shake-Table Test Program

    15 May 2014 | Publications | Contributor(s): Taichiro Okazaki, Eiji Sato, Tomohiro Sasaki, Keri Ryan, Stephen Mahin

    Performance of Triple-Pendulum Bearings Observed in a Full-Scale Shake-Table Test ProgramTriple-pendulum bearings (TPBs) are a seismic-isolation bearing that offers a unique ability to address multiple performance objectives. This paper reports the performance of TPBs observed in a series of...

  9. Seismic performance of buckling-restrained braces using welded end and rectangular steel casing

    15 May 2014 | Publications | Contributor(s): An-Chien Wu, Keh-Chyuan Tsai, Pao-Chun Lin

    Experimental investigation of a novel thin-profile buckling-restrained braceThe buckling-restrained braced frame has been evolved into a very effective system for buildings in seismic areas. Most of the buckling-restrained braces (BRBs) are fabricated by using a doubly-symmetrical steel core,...

  10. Seismic Response of Six-Story Steel Frame Building with Self-Centering Energy-Dissipative (SCED) Braces combined with Linear Viscous Dampers

    15 May 2014 | Publications | Contributor(s): Jeffrey Erochko, Constantin Christopoulos

    Seismic Response of Six-Story Steel Frame Building with Self-Centering Energy-Dissipative (SCED) Braces combined with Viscous DampersThe self-centering energy-dissipative (SCED) brace is an innovative cross-bracing system that eliminates residual building deformations after seismic events and...

  11. SEISMIC BEHAVIOR OF REGULAR MOMENT RESISTING REINFORCED CONCRETE FRAMES WITH  HYSTERETIC ENERGY DISSIPATION DEVICES

    15 May 2014 | Publications | Contributor(s): Arturo Tena-Colunga, Horacio Nangullasmú-Hernández

    SEISMIC BEHAVIOR OF REGULAR MOMENT RESISTING REINFORCED CONCRETE FRAMES WITH HYSTERETIC ENERGY DISSIPATION DEVICESArturo Tena-Colunga, Horacio Nangullasmú-HernándezIn this paper the authors summarize the results of a parametric study devoted to evaluate, using static nonlinear analyses...

  12. Dynamic Testing of a Low-Cost Sliding Isolation System For Light-Frame Residential Structures

    15 May 2014 | Publications | Contributor(s): Ezra Jampole, Gregory Deierlein, Eduardo Miranda, Benjamin Fell, Scott Swensen

    Development of Low-Cost Seismic Isolation for Lightweight Residential Construction in High-Seismic RegionsLight-framed residential structures are generally considered to provide good life safety performance during an earthquake, but they can be vulnerable to costly damage during even moderate...

  13. Isolation for tall buildings, a Japanese case study

    15 May 2014 | Publications | Contributor(s): Tracy Becker, Masayoshi Nakashima, Hiroki Hamaguchi, Shunji Yamamoto, Masahiko Higashino

    Isolation for tall buildings, a Japanese case studyBase isolation practice has flourished in Japan, especially after the 1995 Kobe Earthquake. Its widespread acceptance has allowed its use to spread to more nonconventional applications such as in high-rise (taller than 60m) buildings. While only...

  14. Shaking table tests of a model structure with semi-active resettable devices

    15 May 2014 | Publications | Contributor(s): Roberto Franco-Anaya, Athol J. Carr, J. Geoffrey Chase

    Shaking table tests of a model structure with semi-active resettable devicesThis paper describes an experimental investigation of a four-storey model structure subjected to seismic excitation and controlled by semi-active resettable devices. The model structure is a one-fifth scale steel...

  15. Amplification in the Response of LRB Isolated Structures due to Bidirectional Excitations due to Lead Core Heating

    15 May 2014 | Publications | Contributor(s): Ugurhan Akyuz, Gokhan Ozdemir

    Amplification in the Response of LRB Isolated Structures due to Bidirectional Excitations due to Lead Core HeatingThis study investigates the response of lead rubber bearings (LRBs) under bidirectional earthquake excitations when lead core heating effect is of concern. For this purpose, series...

  16. A Novel Variable Friction Device for Natural Hazard Mitigation

    15 May 2014 | Publications | Contributor(s): Simon Laflamme, Austin Downey, Liang Cao, James Ricles, Douglas Taylor

    Novel Variable Friction Device for Natural Hazard MitigationImplementation of high performance damping devices can increase cost-effectiveness of structural systems for mitigation of natural hazards. However, the applications of these damping systems are limited, due to a lack of 1) mechanical...

  17. Advances in Low-Cost Seismic Isolation with Rubber

    15 May 2014 | Publications | Contributor(s): Dimitrios Konstantinidis, James Kelly

    Advances in Low Cost Seismic Isolation with RubberThis paper examines multi-layer elastomeric isolation bearings where the reinforcing elements, normally thick and inflexible steel plates, are replaced by thin flexible reinforcement. The reinforcement is provided by carbon fiber or thin flexible...

  18. Seismic Tests of Thin Buckling-Restrained Braces

    15 May 2014 | Publications | Contributor(s): Pao-Chun Lin, Yu-Yun Hsiao, An-Chien Wu, Keh-Chyuan Tsai

    Seismic Tests of Thin Buckling-Restrained BracesTests of 14 thin-profile buckling-restrained braces (Thin-BRB) using the rectangular steel casing were conducted in the Taiwan National Center for Research on Earthquake Engineering. Both the pin-connected (8 specimens) and the welded details (6...

  19. Experimental Investigation of Unbonded Fiber Reinforced Elastomeric Isolators with Modified Support Geometry

    15 May 2014 | Publications | Contributor(s): Niel Van Engelen, Michael Tait, Dimitrios Konstantinidis

    Experimental Investigation of Unbonded Fiber Reinforced Elastomeric Isolators with Modified Support GeometryFiber reinforcement is an attractive alternative to conventional steel reinforcement and an important feature in the development of low cost elastomeric isolators for application in...

  20. NUMERICAL EVALUATION OF SEISMIC RESPONSE OF BUILDINGS EQUIPPED WITH PROPPED ROCKING WALL SYSTEMS

    15 May 2014 | Publications | Contributor(s): Afsoon Nicknam, André Filiatrault

    EVALUATION OF SEISMIC RESPONSE AND FRAGILITY ANALYSES OF BUILDINGS EQUIPPED WITH PROPPED ROCKING WALL SYSTEMSPropped Rocking Wall (PRW) is an innovative technology which combines passive damping with unbonded post-tensioned (PT) rocking concrete walls. This system has been proposed to reduce...