[PDF] Top 20 Rev. IBRACON Estrut. Mater. vol.1 número4

... The structural design of buried pipes must meet ultimate and service limit states, veriied from the internal forces. The dificulty in the eval- uation of these internal forces is due to the fact that they depend on ... See full document

... The method A supplied by Eurocode 2 [1] for the design of con- crete columns in ire situation was based on the propositions of Franssen [10], presented in SiF 2000 - First International Work- shop Structures in ... See full document

... − 1 ( 1 / n ) , where 1/n is the level of probability corresponding to n and Φ − 1 is the inverse of the cumulative distribu- tion function of the standard normal variable, the value that the ... See full document

... Meier et al. [1] outlined a new concept for prestressing FRP strips against an external element, developed at Swiss Federal Labora- tories for Testing Materials and Research (EMPA) in Switzerland. In this method, ... See full document

... section 1-1 in loading hypotheses 1 and 2, are shown in Table [7], while Figure [17] illustrates the computa- tion of the ultimate resisting moment for the internal members of section ... See full document

... This paper uses models for composite beams, particularly the “A3”, extracted from experimental tests [6] and numerical applications [11]. The tested model here presented, developed by a researcher [11], uses the same ... See full document

... It was observed that the equations of CEB 90 [1] and of NBR 6118 [2] are not really calibrated to estimate the elasticity module of the light- weight HPC. Besides, it was observed that an estimation of the elas- ... See full document

... An oven specially developed for this study was used to evaluate the exposure time of each sample to maximum temperatures, Figure [2]. It is to be pointed out that this oven is capable of electronically simulating the ... See full document

... tiles were studied at the mix de- sign 1:3 with the residue of 15% and 18.3% (obtained in the study) in dry mass of the layer (Table 12). The modulus of lexural strength met the provisions of the stan- dard ... See full document

... Working with cylindrical test bodies, 10 cm diameter x 20 cm height, heated to 300°C, cooled both slowly and rapidly, Galleto & Me- neguini [3] obtained reductions, respectively, of 4% and 21% only on the ... See full document

... However, concrete speciications are still prescriptive in nature, indicating maximum w/cm, maximum and minimum volume of supplementary cementitous materials, but excludin[r] ... See full document

... Concerns related to concrete curing became more intense after the advent of high strength concrete for buildings, with several in- vestigations about how curing affects compressive strength since in this case it is ... See full document

... (Editor, UFRGS, Porto Alegre, RS, Brazil) • José Luiz Antunes de Oliveira e Sousa (Editor, UNICAMP, Campinas, SP, Brazil) • Luiz Carlos Pinto da Silva Filho (Editor, UFRGS, Porto[r] ... See full document

... Structural analysis of building loors by computerized numerical methods is currently being used in structural design ofices. The design with the aid of computer programs is almost essential, mainly because of the rate ... See full document

... (Editor, UFRGS, Porto Alegre, RS, Brazil) • José Luiz Antunes de Oliveira e Sousa (Editor, UNICAMP, Campinas, SP, Brazil) • Luiz Carlos Pinto da Silva Filho (Editor, UFRGS, Porto[r] ... See full document

... which have expansive behavior and may lead to an overestima- tion of the expansions due to AAR at all ages. Therefore, the use of NaCl solutions does not seem to be a good alternative. In 2004, Lee et al. developed an ... See full document

... The implementation of inite element models to investigate rein- forced concrete structures has been the subject of many studies in the last years (Patrick and Sharon Huo [1], Kim and Aboutaha [2], Park and ... See full document

... Os sistemas estruturais com lajes lisas nervuradas são os mais utilizados no Brasil quando a exigência principal é a disponibilidade de “layouts” lexíveis e grandes vãos com razoável economia. Entretanto, poucos estudos ... See full document

... Uncertainty in concrete resistance increases as the scope of con- cretes considered increases. It is understood that a coupon ex- tracted from a given location of a structure represents with good precision the resistance ... See full document

... The results presented in Table 13 and Figure 4a indicate that the performance of the mortar A3-3 was the worst between the tested mortars, both in the low table test and incorporated air content. In regard to the mortar ... See full document