Progressive Collapse
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Discussion about progressive collapse of masonry buildings
Resumo A maioria dos códigos normativos cita a necessidade da avaliação de ações excepcionais no projeto de estruturas, porém sem fornecer muitos detalhes de quais seriam estas ações e como considerá-las. A consequência da não consideração destas ações pode levar ao colapso progressivo da estrutura. Este tipo de ruína pode ser evitado projeta
Rev. IBRACON Estrut. Mater.. Publicado em: 18/07/2019
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2. Flexible Multibody Dynamics Finite Element Formulation Applied to Structural Progressive Collapse Analysis
Abstract This paper presents a two-dimensional frame finite element methodology to deal with flexible multi-body dynamic systems and applies it to building progressive collapse analysis. The proposed methodology employs a frame element with Timoshenko kinematics and the dynamic governing equation is solved based on the stationary potential energy theorem wri
Lat. Am. j. solids struct.. Publicado em: 2017-01
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3. Effects of Key Factors on Hull Girder Ultimate Strength Estimation by Progressive Collapse Calculations
Abstract The estimation of the ship hull girder ultimate strength under vertical bending moments as close to real behavior is vital both for design stage or seagoing life. The maximum load carrying capacity of ship hulls called ultimate strength depends on a number of factors including the strength of the structural material, initial distortions, dimensions
Lat. Am. j. solids struct.. Publicado em: 2016-12
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4. Severe Loading Assessment of Modern and New Proposed Beam to Column Connections
AbstractThe performance of two different steel beam to column connections known as SidePlateTM and a new proposed connection by seismic loading and progressive collapse were investigated in this research. Seismic performance evaluated included consideration of interstory drift angles and flexural strengths based on 2010 AISC Seismic Provisions while investig
Lat. Am. j. solids struct.. Publicado em: 2015-07
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5. Recomendações para projeto de lajes formadas por vigotas com armação treliçada / Recommendations for design of slabs with lattice reinforcement
As lajes formadas por vigotas pré-moldadas são utilizadas em larga escala no Brasil, em especial as formadas por vigotas treliçadas. As facilidades no manuseio e economia de fôrmas são algumas das vantagens do sistema. Apesar de serem muito utilizadas, ainda existe necessidade de estudo das recomendações no sentido de basear o projeto destas lajes. Os
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2012
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6. Análise de pós-puncionamento em lajes lisas de edifícios em concreto armado
The post punching behavior of a reinforced concrete flat slab building was investigated, as consequence of punching failures resulting in partial or total residual resistance of the connections. Three buildings were analyzed using the Brazilian software TQS (13th version). The connections punching resistances were checked using Brazilian Code NBR 6118: 2003,
Publicado em: 2008
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7. Effects of recruitment maneuver during expiration and inspiration analyzed by thoracic CT scan in patients with acute lung injury and acute respiratory distress syndrome / Efeitos da manobra de recrutamento alveolar nas fases inspiratória e expiratória na tomografia computadorizada de tórax em pacientes com lesão pulmonar aguda ou síndrome do desconforto respiratório agudo
The goal of Maximal Recruitment Strategy (MRS) guided by thoracic CT scan is to minimize alveolar collapse and the mechanisms of ventilator induced lung injury (VILI). The objectives of this study were to compare by quantitative analyzes of CT scan image of the lungs obtained during MRS of patients with ARDS, the following parameters: collapse, overdistensio
Publicado em: 2008
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8. Reforma agrária e preço justo : a indenização na desapropriação para fins de reforma agrária e possibilidades de ruptura do individualismo proprietário / João Paulo de Faria Santos
The following study discusses the theme of the fair price to be paid in indemnification for expropriation with social interest for the purposes of land reform. It reminds the collapse of the property speech from the Brazilian Empire in the nineteenth century, where Joaquim Nabuco, under the mantle of the abolitionist movement, brings the argument that nation
Publicado em: 2008
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9. STABILITY ANALYSIS OF SOIL SLOPES UNDERMINED BY VOÇOROCAS / ANÁLISE DA ESTABILIDADE DE TALUDES SOLAPADOS POR VOÇOROCAMENTO
In this work the finite element method is employed to analyze the stability of soil slopes undermined by voçorocas (gulling). Many of the shear slides occurred in both natural slopes and embankments have been caused by the phenomenon of voçorocas, the outcome of a very complex soil erosion mechanism. A brief review about the formation and growing of voçor
Publicado em: 2001
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10. Xylem Wall Collapse in Water-Stressed Pine Needles
Wall reinforcement in xylem conduits is thought to prevent wall implosion by negative pressures, but direct observations of xylem geometry during water stress are still largely lacking. In this study, we have analyzed the changes in xylem geometry during water stress in needles of four pine species (Pinus spp.). Dehydrated needles were frozen with liquid nit
The American Society for Plant Biologists.
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11. Shock. A century of progress.
The word shock has been used for at least a century in all clinical disciplines to describe a progressive but gradual collapse of vital organ functions. Important initial steps in understanding the problem began at the turn of the century by two means: clear clinical descriptions and the initiation of research into etiology and treatment. The growth of shock
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12. Transtrochanteric Rotational Osteotomy for Nontraumatic Osteonecrosis of the Femoral Head in Young Adults
Transtrochanteric rotational osteotomy (TRO) is a controversial procedure with reported inconsistent results. We reviewed 50 patients (60 hips) who underwent this procedure for extensive osteonecrosis of the femoral head, focusing on varization to determine its effectiveness as a head-preserving procedure in young adults. The mean age of the patients was 28�
Springer-Verlag.