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        Fragility reduction using passive response modification in a Consequence-Based Engineering (CBE) framework

        Duenas-Osorio, Leonardo,Park, Joonam,Towashiraporn, Peeranan,Goodno, Barry J.,Frost, David,Craig, James I.,Bostrom, Ann Techno-Press 2004 Structural Engineering and Mechanics, An Int'l Jou Vol.17 No.3

        Consequence-Based Engineering (CBE) is a new paradigm proposed by the Mid-America Earthquake Center (MAE) to guide evaluation and rehabilitation of building structures and networks in areas of low probability - high consequence earthquakes such as the central region of the U.S. The principal objective of CBE is to minimize consequences by prescribing appropriate intervention procedures for a broad range of structures and systems, in consultation with key decision makers. One possible intervention option for rehabilitating unreinforced masonry (URM) buildings, widely used for essential facilities in Mid-America, is passive energy dissipation (PED). After the CBE process is described, its application in the rehabilitation of vulnerable URM building construction in Mid-America is illustrated through the use of PED devices attached to flexible timber floor diaphragms. It is shown that PED's can be applied to URM buildings in situations where floor diaphragm flexibility can be controlled to reduce both out-of-plane and in-plane wall responses and damage. Reductions as high as 48% in roof displacement and acceleration can be achieved as demonstrated in studies reported below.

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        Fragility reduction using passive response modification in a Consequence-Based Engineering(CBE) framework

        L. Duenas-Osorio,박주남,P. Towashiraporn,B. J. Goodno,D. Frost,J. I. Craig,Ann Bostrom 국제구조공학회 2004 Structural Engineering and Mechanics, An Int'l Jou Vol.17 No.3-4

        Consequence-Based Engineering (CBE) is a new paradigm proposed by the Mid-AmericaEarthquake Center (MAE) to guide evaluation and rehabilitation of building structures and networks inareas of low probability - high consequence earthquakes such as the central region of the U.S. Theprincipal objective of CBE is to minimize consequences by prescribing appropriate intervention proceduresfor a broad range of structures and systems, in consultation with key decision makers. One possibleintervention option for rehabilitating unreinforced masonry (URM) buildings, widely used for essentialfacilities in Mid-America, is pasive energy disipation (PED). After the CBE process is described, itsapplication in the rehabilitation of vulnerable URM building construction in Mid-America is illustratedthrough the use of PED devices attached to flexible timber floor diaphragms. It is shown that PEDs canbe applied to URM buildings in situations where flor diaphragm flexibility can be controlled to reduceboth out-of-plane and in-plane wall responses and damage. Reductions as high as 48% in rofdisplacement and acceleration can be achieved as demonstrated in studies reported below.

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