Composite Hollow Truss With Multiple Vierendeel Panels [treliça Tubular Mista Com Múltiplos Painéis Vierendeel]

The aim of this study was to evaluate through analytical calculation, two-dimensional elastic modeling, and three-dimensional plastic modeling, the bearing capacity and failure modes of composite hollow trusses bi-supported with a 15 meter span, varying the number of central Vierendeel panels. The study found the proportion span/3 - span/3 - span/3, as the ideal relationship for the truss - Vierendeel - truss lengths, because by increasing the proportion of the length occupied by the central Vierendeel panels, the new system loses stiffness and no longer supports the load stipulated in the project. Furthermore, they can start presenting excessive vertical displacements and insufficient resistance to external shear forces acting on the panels.664431438(2005) Ansys version 10.0-basic analysis procedure, , ANSYS INC, Houston, PA, United States(2003) NBR 6118-Projeto de estruturas de concreto-procedimento, , ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS (ABNT), Rio de Janeiro: ABNT-Associação Brasileira de Normas Técnicas(2008) NBR 8800-Projeto de estruturas de aço e de estruturas mistas de aço e concreto de edifícios, p. 237. , ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS (ABNT), Rio de Janeiro: ABNT-Associação Brasileira de Normas Técnicas(2001) CAN/CSA-S16-01 Limit states design of steel structures, p. 167. , CANADIAN STANDARDS ASSOCIATION (CSA), Mississauga, OntarioClawson, W.C., Darwin, D., Strenght of composite beams at web openings (1982) Journal of the Structural Division-ASCE, 108, pp. 623-641. , marChien, E.Y.L., Ritchie, J.K., (1984) Design and construction of composite floor systems, , Canadian Institute of Steel Construction, 323p(2005) EN 1993-1-8:2005. Eurocode 3: Design of steel structures-Part 1-8: Design of joints, p. 135. , EUROPEAN COMMITTEE FOR STANDARDIZATION (ECS), BrusselsLawson, R.M., (1987) Design for openings in the webs of composite beams-SCI-P-068-CIRIA Special Publication 51, p. 44. , Ascot, UK: Steel Construction InstituteLawson, R.M., Hicks, S.J., (2011) Design of composite beams with large web openings-SCI-P-355, p. 116. , Ascot, UK: The Steel Construction InstituteMartha, L.F., (2008) Ftool-two-dimensional frame analysis tool-versão educacional 2.12, , http://www.tecgraf.puc-rio.br/ftoll, Rio de Janeiro: Pontifícia Universidade Católica do Rio de Janeiro. 2008. Disponível em, Acesso em 19 abr(2010) A solução definitiva em lajes, p. 8. , METFORM, BetimSamarra, F.A., Requena, J.A.V., Júnior, N.O.P., Análise numérica-experimental de treliças tubulares planas para coberturas padronizadas para grandes vãos (2012) REM-Revista Escola de Minas, 65 (4), pp. 459-466Silva, A.O.B., (2013) Treliça tubular mista com múltiplos painéis Vierendeel, p. 339. , Campinas: Faculdade de Engenharia Civil, Arquitetura e Urbanismo, Universidade de Campinas, (Tese de Doutorado)Tide, R.H.R., Galambos, T.V., Composite open-web steel joists (1970) Engineering Journal (American Institute of Steel Construction), 7 (1), pp. 27-3

Comparação do peso vivo de cavalos Lusitanos obtido por meio de balança digital e de medidas corporais

Apresentação oralO objetivo deste estudo foi comparar o peso de cavalos Puro-Sangue Lusitano (PSL) obtido em balança digital (BD) e o estimado a partir de medidas corporais com fita métrica (FM), por meio de dois cálculos distintos. Foram avaliados 41 cavalos da raça PSL (todos machos inteiros), com idades entre os 3 e 21 anos, distribuídos em 2 grupos de idades: 23 animais com 3-5 anos (Aate5a) e 18 animais com 6 ou mais anos (A+6a). Os cavalos foram pesados numa BD (erro 0,5 kg), tendo sido medidos no mesmo momento, a altura ao garrote (AG) com hipómetro e o perímetro torácico (PT) em metros e centímetros com FM. Para cada animal, foram estimados dois pesos a partir de fórmulas existentes na literatura: pesoAf1 = PT3 x 80 (PT em metros, McManus, et al., 2005); pesoAf2 = (4,3 x PT) + (3 x AG) – 785 (PT e AG em cm, INRA, 1990). Os pesos médios obtidos na BD foram 481,2±38,8 kg, pAf1 477,2±47,0 kg e pAf2 473,8±33,4 kg para o grupo Aate5a sendo que, não foram observadas diferenças significativas entre as médias dos pesos obtidos por BD e os estimados por pesoAf1. Verificaram-se diferenças entre os pesos BD e os pesoAf2 (p<0.05). Observaram-se diferenças significativas entre os pesos BD do grupo A+6a (535,9±53,3 kg) e os pesos estimados a partir das duas fórmulas (pesoAf1: 550,9±61,8 kg; pesoAf2: 517,3±38,9 kg) (p<0,05). Os resultados sugerem que o peso dos cavalos estimado a partir de medidas corporais com FM, não é muito preciso em animais adultos. Por sua vez, valores próximos (pesoAf1) ao peso obtido por BD, sugerem a sua possível utilização nos animais entre três e cinco anos de idade. Contudo, o valor mais exato do peso vivo de cada equino, deve, tanto quanto possível ser determinado em balança digital.info:eu-repo/semantics/publishedVersio

Reproductive tract development and puberty in two lines of Nellore heifers selected for postweaning weight

AbstractThe objective was to evaluate reproductive tract development (ovary and uterus) and onset of puberty in two lines of Nellore heifers (Bos indicus) selected for postweaning weight. A total of 123 heifers, including 46 from the control Nellore line (NeC) and 77 from the selection Nellore line (NeS) were used. Every 18 to 21 days from 12 to 24 months of age, average ovarian area (OVA), endometrial thickness (ETh), and diameter of the largest follicle in each ovary were evaluated (using transrectal ultrasonography), and body weight, hip height, and body condition score were measured. There were no differences between NeS and NeC heifers for ETh or OVA (P < 0.05). Genetic selection for higher postweaning weight had no negative influence on the onset of puberty, with 52% and 48% of NeC and NeS heifers, respectively, pubertal at 24 months of age (P = 0.49). Heifers that reached puberty at the end of the study were heavier (NeC, 296.9 vs. 276.7 kg; NeS, 343.5 vs. 327.9 kg; P < 0.01) and younger (NeC, 23.4 vs. 24.2 mo; NeS, 22.7 vs. 24.0 months; P < 0.01) than those that did not. Furthermore, heifers that were heavier at weaning reached puberty earlier. Pubertal heifers had a greater OVA (4.15 vs. 3.14 cm2; P < 0.01) and ETh (12.15 vs. 9.93 mm; P < 0.01) than nonpubertal heifers. Taken together, OVA and ETh had positive effects (P < 0.01) on the onset of puberty and were suitable indicator traits of heifer sexual precocity in pasture management systems. However, selection for weight did not alter ovarian or endometrial development, or manifestation of puberty at 24 months of age. Among the growth traits studied, weaning weight and weight at puberty had significant positive effects on manifestation of first estrus

The performance of the jet trigger for the ATLAS detector during 2011 data taking

The performance of the jet trigger for the ATLAS detector at the LHC during the 2011 data taking period is described. During 2011 the LHC provided proton–proton collisions with a centre-of-mass energy of 7 TeV and heavy ion collisions with a 2.76 TeV per nucleon–nucleon collision energy. The ATLAS trigger is a three level system designed to reduce the rate of events from the 40 MHz nominal maximum bunch crossing rate to the approximate 400 Hz which can be written to offline storage. The ATLAS jet trigger is the primary means for the online selection of events containing jets. Events are accepted by the trigger if they contain one or more jets above some transverse energy threshold. During 2011 data taking the jet trigger was fully efficient for jets with transverse energy above 25 GeV for triggers seeded randomly at Level 1. For triggers which require a jet to be identified at each of the three trigger levels, full efficiency is reached for offline jets with transverse energy above 60 GeV. Jets reconstructed in the final trigger level and corresponding to offline jets with transverse energy greater than 60 GeV, are reconstructed with a resolution in transverse energy with respect to offline jets, of better than 4 % in the central region and better than 2.5 % in the forward direction

Search for long-lived neutral particles in pp collisions at s√=13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter

This paper describes a search for pairs of neutral, long-lived particles decaying in the ATLAS calorimeter. Long-lived particles occur in many extensions to the Standard Model and may elude searches for new promptly decaying particles. The analysis considers neutral, long-lived scalars with masses between 5 and 400 GeV, produced from decays of heavy bosons with masses between 125 and 1000 GeV, where the long-lived scalars decay into Standard Model fermions. The analysis uses either 10.8 fb−1 or 33.0 fb−1 of data (depending on the trigger) recorded in 2016 at the LHC with the ATLAS detector in proton–proton collisions at a centre-of-mass energy of 13 TeV. No significant excess is observed, and limits are reported on the production cross section times branching ratio as a function of the proper decay length of the long-lived particles

Study of Z → llγ decays at √s = 8 TeV with the ATLAS detector

This paper presents a study of Z → llγ decays with the ATLAS detector at the Large Hadron Collider. The analysis uses a proton–proton data sample corresponding to an integrated luminosity of 20.2 fb−1 collected at a centre-ofmass energy √s = 8 TeV. Integrated fiducial cross-sections together with normalised differential fiducial cross-sections, sensitive to the kinematics of final-state QED radiation, are obtained. The results are found to be in agreement with stateof-the-art predictions for final-state QED radiation. First measurements of Z → llγ γ decays are also reported