[PDF] Top 20 Rev. IBRACON Estrut. Mater. vol.9 número5

... We are now releasing the October 2016 issue of the IBRACON Structures and Materials Journal (Vol- ume 9 Number 5, October 2016). This issue brings eight articles on concrete structures and materials. ... See full document

... In order to obtain an equation that represents the results related to the medium and maximum bond stress according to the concrete strength and the diameter of the bar, for Brazilian m[r] ... See full document

... the safety aspect. According to Bastos [6], in addition to the transmission of vertical loads to the foundation elements, the pillars are part of the brac- ing system responsible for ensuring the overall stability of the ... See full document

... Recycling is seen as an alternative in trying to remove from the en- vironment the waste produced daily by our society. In Brazil, about 54.38 million tons per year of municipal solid waste are produced [2]. However, a ... See full document

... Table 9 presents the theoretical results for shear resistance ac- cording to the codes ACI 318 [3], EUROCODE 2 [4] and NBR 6118 [5] and the experimental results obtained from tests of the six pre- stressed beams, ... See full document

... The study indicated a clear necessity to relection on the subject, since there is no concern, or even, a lack of knowledge by the interviewed professionals regarding the care and proced[r] ... See full document

... A tied-arch strut and tie model consistent with the peak measured loads and based on the procedure proposed by Wight & Parra- Montesinos [9], was slightly modiied in order to estimate the ef- fective strength ... See full document

... However, the design codes adopt a ixed set of partial safety fac- tors that are applied to all structures present in the implementation scope of the code. This assumption makes that diferent types of structural elements ... See full document

... From the linear interval (stress x strain) the elasticity modulus and the Poisson ratio were obtained, admitting as the linear interval values from 0.5 MPa to 30% of the average failur[r] ... See full document

... The expansion reduction may also be attained by chemical addi- tions to the concrete, like lithium compounds. Qinghan et al [7] and Lumley [8] indicate that lithium compounds are efective to inhibit ASR expansion, ... See full document

... The fourth issue of volume nine of the IBRACON Structures and Materials Journal (Volume 9 Num- ber 4, August 2016) is now released. The issue begins with a global stability analysis of a reinforced concrete ... See full document

... Thus, many structures need equilibrium and kinematic relationships to be used in the structure’s deformed coniguration [4]. Thus, global stability veriication becomes a requirement in project design of re- inforced ... See full document

... Figures 9 and 10, respectively, show typical failure modes in cylin- drical and hourglass-like ...(Figure 9(a)) and column-like (Fig- ure 9(b)), shear mode of failure was the only mode observed in ... See full document

... mortar and concrete samples, corresponds to the established Bra- zilian standard technical norm, ASTM D5298 [7], on the subject of paper ilter practice, which considers suction values between the range of 30 to 30.000 ... See full document

... This paper proposes an automatic process for the analysis and deinition of thin shells segments revolution geometry (domes) submitted to its own weight by membrane theory with t[r] ... See full document

... Revista IBRACON de Estruturas e Materiais (Volume 9 Número 3) está sendo publicado com oito artigos relacionados a aplicações de materiais e estruturas de con- ... See full document

... An evaluation of the concrete compressive modulus of elasticity is obtained directly from the stress-strain curve experimentally. Nor- mal techniques, such as the Brazilian standard (NBR 8522 [1]) and the American ... See full document

... each group of bars (coated with Zinc, Zinc-Nickel and uncoated), as shown in igures 8 and 9. As expected, in both tests the galvanized bars presented a lower corrosion rate than the uncoated ones. In the aging ... See full document

... There are several works concerning the SBA use in concrete mix- tures as a supplementary cementitious material incorporated as par- tial cement replacement [2-5]. The usual process of SBA treatment through milling and ... See full document

... apresentada na Tabela 3, pode-se dizer que para o teor de 5% de cinza, os resultados obtidos foram inferiores à referência nas idades de 1, 28, 91 e 365 dias, variando entre 4% e 7%. P[r] ... See full document