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Effectiveness of various outrigger systems under different structural materials for a reinforced concrete high rise building subjected to wind loads

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dc.contributor.advisor Gamage JCPH
dc.contributor.author Nissanka NAAC
dc.date.accessioned 2022
dc.date.available 2022
dc.date.issued 2022
dc.identifier.citation Nissanka, N.A.A.C. (2022). Effectiveness of various outrigger systems under different structural materials for a reinforced concrete high rise building subjected to wind loads [Master's theses, University of Moratuwa]. Institutional Repository University of Moratuwa. http://dl.lib.uom.lk/handle/123/22500
dc.identifier.uri http://dl.lib.uom.lk/handle/123/22500
dc.description.abstract The structural efficiency of tall buildings significantly relies on the lateral stiffness of building and its resistance capacity against lateral loads. However, when the structure becomes taller and slender, the building responses under wind loads become more pivotal as it reduces structural stiffness of building. Therefore outrigger and belt truss structural systems that connect through the central core system and the most exterior columns in building are often introduced in high rise structures to provide adequate lateral stiffness in order to control the wind deflection and drift criteria in acceptable limits. Most research works are limited to building with outrigger systems of concrete material, consisting of simple square and rectangular shaped building plan layouts having vertical regularity. Only few studies were based on a single model under different patterns of outrigger structural systems to identify the optimum outrigger structural system when outrigger arrangements are varied. This study aims to bring a broader understanding of both conventional outrigger & virtual outrigger systems by identifying the most efficient lateral load resisting outrigger system for a reinforced concrete high rise building under different outrigger structural materials of concrete, steel and composite by comparing the performance for three different outrigger arrangements; only outriggers, only belt truss and combination of both outrigger and belt truss when subjected to wind loads while their positions remain constant for all the three cases. The structural performance was evaluated based on building frequency, wind induced lateral displacement at top storey and inter storey drift ratio and results demonstrate that addition of outriggers and belt trusses of different structural materials have significantly enhanced the structural performance of building against wind action and the best form of outrigger structural arrangement is varied based on each structure material. en_US
dc.language.iso en en_US
dc.subject OUTRIGGERS en_US
dc.subject WIND LOAD en_US
dc.subject LATERAL DISPLACEMENT en_US
dc.subject INTER STOREY DRIFT en_US
dc.subject REINFORCED CONCRETE BUILDING en_US
dc.subject CIVIL ENGINEERING- Dissertation en_US
dc.subject STRUCTURAL ENGINEERING- Dissertation en_US
dc.title Effectiveness of various outrigger systems under different structural materials for a reinforced concrete high rise building subjected to wind loads en_US
dc.type Thesis-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.degree MSc in Structural Engineering en_US
dc.identifier.department Department of Civil Engineering en_US
dc.date.accept 2022
dc.identifier.accno TH4877 en_US


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