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Wind loads on buildings with vaulted roofs and side walls: a review
Get PDFThe recommendations of the Argentinean code of practice CIRSOC 102 concerning wind loads on enclosed buildings with curved roofs are identical to those of ASCE 7, which are based on results published in 1914. Significant differences can thus be expected if this treatment is compared with an updated bibliography. This paper reviews the information available in the open literature, including a number of significant studies written in Portuguese that are not readily accessible, with the CIRSOC 102 treatment then compared with state-of-the-art results. The need to update the code is shown, possible criteria and values are suggested, and research needs are listed.Fil: Natalini, Bruno. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Nordeste. Facultad de Ingeniería; ArgentinaFil: Natalini, Mario Bruno. Universidad Nacional del Nordeste. Facultad de Ingeniería; Argentin
El CIRSOC 102 y su actualización
No full textLa Comisión Permanente de Acción del Viento del CIRSOC se encuentra abocada a la redacción de la actualización del Reglamento Argentino de Acción del Viento sobre las Construcciones CIRSOC 102-2005,cuyo proyecto se espera poner en discusión pública en breve.En este artículo se comentan los aspectos principales que se prevé incorporar, a fin de orientar y estimular la participación de los futuros usuarios en el proceso de discusión, previo a la entrada en vigencia del texto.Las modificaciones propuestas se basan principalmente en el estándar ASCE/SEI 7-10 Minimum Design Loads for Buildings and Other Structures, además de algunas prescripciones tomadas del más reciente ASCE/SEI 7-16. También incluye algunas adaptaciones y temas provenientes de desarrollos locales y de la experiencia en el uso de la normativa actual.Fil: Natalini, Bruno. Universidad Nacional del Nordeste. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Investigación Para El Desarrollo Territorial y del Habitat Humano. Universidad Nacional del Nordeste. Facultad de Arquitectura y Urbanismo. Instituto de Investigación Para El Desarrollo Territorial y del Habitat Humano.; ArgentinaFil: Balbastro, Gustavo Carlos. Universidad Nacional del Nordeste. Facultad de Ingeniería; Argentina. Universidad Tecnológica Nacional. Facultad Regional Paraná; Argentin
Damaging wind storms in North Eastern Argentina: seven case studies
Get PDFArgentina is a large country with several areas dominated by different climate mechanisms. Since 2008, damage to civil structures caused by strong winds has been surveyed in Chaco and the neighbouring areas. Chaco is a province of NEA, the north-east region of the Argentina, which also includes the provinces of Formosa, Corrientes and Misiones. The strong wind events in NEA are related to severe convective storms. In this work, we present findings about wind-induced damage in NEA and the prevailing meteorological conditions. We emphasise seven particular cases for which the conditions of the atmosphere were reconstructed through reanalysis.Fil: Natalini, Bruno. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Universidad Nacional del Nordeste. Facultad de Ingeniería; ArgentinaFil: Lassig, Jorge Luis. Universidad Nacional del Comahue. Facultad de Ingeniería; ArgentinaFil: Natalini, Mario Bruno. Universidad Nacional del Nordeste. Facultad de Ingeniería; ArgentinaFil: Palese, Claudia. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentin
Pressures on open canopy structures with parapets under wind loading
Get PDFPressure coefficients due to wind in open canopy structures with parapets, such as those commonly used in gas stations, are presented. Two independent methodologies were used to obtain pressure coefficients: wind tunnel testing and Computational Fluid Dynamic (CFD) modeling. The experiments were performed in a low velocity atmospheric boundary layer wind tunnel. The atmospheric boundary layer flow was simulated in the tunnel and a small scale model of a canopy made with aluminum plates was tested considering wind incidence at 0 (normal-to-the ridge direction) and 30. Pressures were measured at a number of locations on the plate and the parapets. CFD models were investigated under steady state conditions using commercial software. The wind tunnel results for a canopy without parapets were found to be in agreement with results obtained by other authors. The CFD simulations were in good agreement with the wind tunnel results for canopies with parapets. The values of the net pressure coefficients on the main surface show downward pressures close to the windward zone, followed by suction at the center, and downward pressure on the leeward zone of the canopy. Differences with current recommendations for the design of canopies are highlighted.Fil: Poitevin, Augusto. Chm Structural Engineers; Estados UnidosFil: Natalini, Bruno. Universidad Nacional del Nordeste. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Godoy, Luis Augusto. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Review of extreme wind speeds in three sites of southern Argentina
Get PDFLa valoración de la acción del viento sobre un edificio en la etapa de diseño requiere conocer la magnitud de las máximas velocidades de viento a las que estará expuesta la estructura durante su vida útil. En la práctica profesional, esta información se extrae del llamado mapa de vientos, que es parte de los reglamentos nacionales de acción del viento sobre estructuras civiles. En Argentina, el reglamento pertinente es el CIRSOC 102. Si bien fue editado en 2005, el mapa de vientos que trae este reglamento se basa principalmente en información meteorológica del período entre 1970 y 1990. En este trabajo se discute la metodología usada para construir este mapa, a la luz de procedimientos más actualizados desarrollados en los últimos 20 años. Se ilustra la discusión aplicando algunos de estos nuevos procedimientos a registros de tres estaciones meteorológicas de zonas donde el clima está dominado por depresiones y se muestra la conveniencia de actualizar el mapa.The assessment of wind loads on a building during design requires knowing the maximum wind speed to which the structure will be exposed during its lifetime. Practitioners obtain this information from the so-called wind map, which is part of the national codes of practice of wind actions on civil structures. In Argentina, the relevant code is the CIRSOC 102. Although it was edited in 2005, the wind map of this code is based on meteorological data collected between 1970 and 1990. In this paper, the methodology used to build this map is discussed in view of more up-to-date procedures developed in the last 20 years. The discussion is illustrated by applying some of these newer procedures to records of three meteorological stations located in areas where the climate is dominated by depressions, and the convenience of updating the map is shown.Fil: Natalini, Bruno. Universidad Nacional del Nordeste; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Natalini, Mario Bruno. Universidad Nacional del Nordeste; Argentin
Mean loads on vaulted canopy roofs
Get PDFThe vaulted canopy roof (VCR) is a widespread structure used in vast areas of South America, especially in parts of Argentina, Brazil and Paraguay. Information about the aerodynamics of VCRs is scarce in the literature, and it is restricted to mean load coefficients, which must be used in combination with the quasi-steady approach. Most of the existing data have been produced during the last decade in South America, but these data are not readily accessible because they were published in Spanish. This paper presents the results of mean wind load coefficients on VCRs obtained in boundary layer tunnel tests, and the aerodynamics of VCRs are discussed by taking into account the data produced during the last decade.Fil: Natalini, Bruno. Universidad Nacional del Nordeste. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Morel, C.. Universidad Nacional del Nordeste. Facultad de Ingenieria; ArgentinaFil: Natalini, María Belén. Universidad Nacional del Nordeste. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
Wind-induced damage in two regions of Argentina
Get PDFInformation on wind-induced damage to civil structures in Argentina is scarce. In this paper, general trends regarding both meteorological conditions and patterns of damage when damage occurred in two regions of Argentina are presented. The regions under study were the north-east of Argentina (NEA) and the north-Patagonia. This research is based on a collection of data comprising field surveys conducted after the passage of destructive storms, NCEP/NCAR Reanalysis, a Global Data Assimilation System model and other secondary sources like emergency services, local press, local councils and the National Weather Service. It is shown that both regions have similar problems of vulnerability, even though they have different meteorological environments. Topics that must be addressed to reduce the vulnerability of civil structures have been identified.Fil: Natalini, Bruno. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Universidad Nacional del Nordeste. Facultad de Ingeniería; ArgentinaFil: Lassig, Jorge Luis. Universidad Nacional del Comahue. Facultad de Ingeniería; ArgentinaFil: Natalini, Mario Bruno. Universidad Nacional del Nordeste. Facultad de Ingeniería; ArgentinaFil: Palese, Claudia. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentin
Wind-induced damage in two regions of Argentina
Get PDFInformation on wind-induced damage to civil structures in Argentina is scarce. In this paper, general trends regarding both meteorological conditions and patterns of damage when damage occurred in two regions of Argentina are presented. The regions under study were the north-east of Argentina (NEA) and the north-Patagonia. This research is based on a collection of data comprising field surveys conducted after the passage of destructive storms, NCEP/NCAR Reanalysis, a Global Data Assimilation System model and other secondary sources like emergency services, local press, local councils and the National Weather Service. It is shown that both regions have similar problems of vulnerability, even though they have different meteorological environments. Topics that must be addressed to reduce the vulnerability of civil structures have been identified.Fil: Natalini, Bruno. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina. Universidad Nacional del Nordeste. Facultad de Ingeniería; ArgentinaFil: Lassig, Jorge Luis. Universidad Nacional del Comahue. Facultad de Ingeniería; ArgentinaFil: Natalini, Mario Bruno. Universidad Nacional del Nordeste. Facultad de Ingeniería; ArgentinaFil: Palese, Claudia. Universidad Nacional del Comahue. Facultad de Ingeniería; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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