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This report presents the magnitude and the spatial distribution of wind loads on low-slope roofs of low-rise buildings based on the literature and the North American codes (NBCC 2015 and ASCE 7-16). Also, a comparison of wind loads on roofs with and without parapets is included, as well as, a wind tunnel study on nearly flat roof of large plan dimensions.
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This paper considers a comparative study of the effect of variability in wind load on structures using two separate approaches. The first approach is based on the provisions of IS 875-Part 3 (Indian code on wind loads) while the second approach is based on definition of uncertainty by intervals. In the first approach, the variability of wind loads is considered using the provisions of Indian code. In the second approach, the uncertainty in wind load is modeled using intervals and the structural response is evaluated using an interval finite element approach. The Indian code defines a basic wind speed and then makes further modifications based on location, risk coefficient, terrain, topography and importance of the structure. The objective of the present work is to evaluate the effectiveness of the provisions of the Indian code in predicting the variability of wind loads. This is done by modeling variability of wind loads using an interval finite element approach based on the mixed finite element formulation. The response of the structure is computed in both cases and a comparison is made. Fuzzy combined membership function is plotted for stress in members allow the designer to evaluate safety of members at various levels of uncertainty of structural parameters. This comparative study yields an interesting insight on the effect of variability of wind loads on structural response. It also demonstrates the effectiveness of interval finite element approach to model uncertainty in applied loads and Young’s modulus
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Buildings are subjected to natural hazards such as wind and seismic, and when subjected too, will have an effect on the overall behaviour of the structure. This study describes the effect of wind and seismic loads towards the structural behaviour of low rise residential building in Timur Leste. Various bracing system design were proposed to the building and analytical results were recorded and observed. Wind data velocity (V) was taken at 33 m/s in open country. The data was collected at location for wind and seismic on high intensities for a 20 year cycle. For the simplicity of illustrating the design, the study focuses on the analysis of a two and three dimensional three bay fourstorey moment resisting frames on rigid foundation. Lateral wind load was determined in accordance to BS CP3 Chapter V part 2 1972 standard. Seismic deign load on building was obtained at Peak Ground Acceleration (PGA) for low, medium and high ground motion on building in accordance with UBS 1997. The anal.
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Bakeer, T.: The performance of masonry buildings under wind loads — The influence of the global effect on component response. Mauerwerk. 15 (2011) 2, pp.88-97
Abstract The following contribution focuses on the global behaviour of masonry structures subjected to wind loads. It describes the interaction between the structural elements and their influences on the global behaviour. Numerical models based on discrete / finite element approach of different scales have been built for a typical terraced house masonry building. The models have been used to investigate the contribution of each shear wall to the overall capacity of the structure, and to determine the portion of each from vertical/horizontal loads. The results give an insight into the interaction between the deformation of the slab and the rocking of the shear walls. The different performances between the model with rigid foundation and the model with elastic foundation have been compared. Models for strips of the building have been built with an intention to deal with in-plane behaviour separated from the influences of load distribution. A comparison of the results of the strip model with the results of the global model shows, that the strip model results are in safe side. Das Verhalten von Mauerwerk unter Windlasten — Der Einfluss der Gesamteinwirkung auf die Reaktion einzelner Bauteile. Der folgende Beitrag konzentriert sich auf das globale Verhalten von Mauerwerksbauten unter Windlasten. Er beschreibt die Wechselwirkungen zwischen den einzelnen Strukturelementen und deren Einflüsse auf das Gesamtverhalten. Es sind numerische Modelle für ein typisches Reihenhaus aus Mauerwerk, die auf dem Diskrete-/ Finite-Elemente-Ansatz basieren, in unterschiedlichen Ma�stäben erstellt worden. Die Modelle dienten der Untersuchung des Beitrages jeder einzelnen Wandscheibe zur Gesamtwiderstandsfähigkeit des Bauwerks sowie ihres Anteils an der Ableitung der vertikalen und horizontalen Belastungen. Die Ergebnisse geben einen Einblick in die Wechselwirkung zwischen der Verformung der Deckenplatte und dem Kippen der Wandscheiben. Es wurde das unterschiedliche Verhalten eines Modells mit starrem Fundament und eines Modells mit elastischer Gründung verglichen. Verschiedene Streifenmodelle des Gebäudes dienten dazu, das Schub-Verhalten getrennt von den Einflüssen der Lastverteilung beschreiben zu können. Ein Vergleich der Ergebnisse des Streifenmodells mit den Ergebnissen des Gesamtmodells zeigt, dass das Streifenmodell auf der sicheren Seite liegt.
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Journal of Astm International
