[PDF] Top 20 Rev. IBRACON Estrut. Mater. vol.5 número3

... Mercury intrusion porosimetry (MIP) performed on the crushed pieces of the composites of the size of up to 5 mm was used for as- sessment of the level I porosity, i.e., pores in the range from 0.6 µm to 10µm, ... See full document

... The FRP strip (1) is wrapped around the wheels (2) and clamped at its ends (3) as shown in Figure [2] (b). The strip can be prestressed by ro- tating one or both wheels (4a) or displace the wheels (4b). As one can see in ... See full document

... The independent variables were chosen based on the correlation of each with the dependent variable and based on existing literature on dam be- havior prediction models. The variables selected for the prediction mod- els ... See full document

... With the aim of contributing to the structural evaluation of reinforced concrete bridges it was decided to analyze the stresses in reinforced concrete bridge sections to verify the eff[r] ... See full document

... The use of a rebound hammer test was the irst test possibility to be considered due to its simplicity and low cost. This test is based on the evaluation of a mass rebound after being ired against a surface at a standard ... 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

... icients obtained from the diagram M x N x 1/r differ from standards that use a simpliied consideration of PNL; the stiffness reduction coeficient for columns in the arrangements analyze[r] ... See full document

... Two columns were used as reference, one having the original dimensions of the column and the other, monolithic, had been cast along the thick- ness of the strengthened piece. The remaining columns received a 35 mm thick ... See full document

... By the statistical analysis with multiple comparison of compressive strength results of concrete blocks, presented in Tables 3 and 4 and Figures 11 and 12, it is observed that for traits with replace- ment of 50%, 80% ... See full document

... Another study considered important is [4], which proposed a typology of bolted connection with circular cross section CFT column. In this paper it was presented an analytical study, us- ing a reined three-dimensional ... See full document

... Firstly, the compressive strengths found at 7, 28 and 91 days will be compared for the same individual unit compositions and after the mixtures costs, as well as the modulus of elastic[r] ... See full document

... For this purpose, the behavior of short composite steel- concrete columns was studied using physical experimental tests, measuring the increase in temperature of the surface and intern[r] ... See full document

... Table 5) shows that the results obtained with the approximate stiffness criterion are safer with only 4,6% of the Mtest/Mpred values below the appropriate safety range (smaller than ... 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

... Approximately 35–40% of bauxite ore is discarded in the form of strongly alkaline RM slurry ‎[4]. This mud contains about 60 vol. % of solid content in the form of superine particles. Therefore, this mate- rial ... See full document

... Among the products generated in the processing of iron ore, mud from washing, in most cases, is stored in tailings dams without a commercial use because the technology to transform this waste in metallic iron is more ... See full document

... Within this context, recent researches on the performance of ba- gasse ash in concrete has been developed in the Laboratory of Structures at COPPE/UFRJ, based on studies of the rheological, thermal and mechanical ... See full document

... The column-foundation connection through socket consists of em- bedding part of the precast column into the cavity of the foundation element. This connection is widely used in precast concrete struc- tures all over the ... See full document

... The speciication of performance criteria which were not determined with the use of mathematical models to predict the structure service life does not constitute a performance-based spe[r] ... See full document

... The tests were interrupted when the “unsafe potential” was reached in samples in the dry state. For a better view, these results are presented in Figure 5. As can be seen, the reinforcing bars in specimens ... See full document