[PDF] Top 20 Rev. IBRACON Estrut. Mater. vol.4 número5

... (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

... nance frequency of the structural element (prismatic or cylindrical), is one of the most widespread in Engineering. It is used for determining the dynamic modulus of elasticity, , the dynamic Poisson’s ratio, the dynamic ... 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

... According to NBR 8522:2008 [4], the determining process of the concrete tangent elastic modulus must follow a script for the appli- cation of loading and also respect the characteristics of measuring devices and ... See full document

... this modeling tool. In some networks, mean errors reached values below 4 MPa (ANN 7x4x20x20x1, ANN 7x6x20x20x1 and ANN 7x8x20x20x1), with network 7x8x20x20x1 obtaining the lowest error (3.09 MPa) in this phase. It ... See full document

... In the construction industry, the most commonly used material is concrete, a product that uses natural resources in its composition, such as sand and gravel, Isaia [4]. Researches have been under- taken with the ... See full document

... C-S-H was produced with varying Ca/Si ratios that were maintained below 0.8 to facilitate the intercalation of cationic polymers [4,5]. Analysis of the results veriied the formation of calcium silicate hy- drate similar ... See full document

... Many studies have been conducted in the last years to investigate the inluence of cyclic loads on reinforced concrete structures (including those using composite materials as reinforcement) mainly for the ulti- mate ... See full document

... Drysdale and Hamid [3], Maurenbrecher [4], Prudêncio Jr. [5], Colville and Wolde-Tinsae [6] and Page et al. [7] state that the re- sults obtained from tests with two-block elements are dificult to cor- relate with ... See full document

... Figures [11], [12], [13] and [14], show some graphs generated by the program during the Pseudo-Dynamic analysis and the results of the normal, shear and principal stresses in six joint[r] ... See full document

... This means that the moments M a will surpass the cracking moments M r much more quickly for the frames in examples 2 and 6 than for the frames in examples 3 and 5; in the l[r] ... 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

... The characteristic values of the material properties represent ei- ther the mean values (e.g. modulus of elasticity) or 5%, 95%, or al- ternatively a different distribution fractile of the considered random quantity ... See full document

... An alternative approach called multiphase model was recently de- veloped, providing a mechanically consistent framework to analyze the behavior of structures made up of materials reinforced by lin- ear continuous ... See full document

... Due to the exhaustion of the natural aggregates quarries near the consuming centers, the increase of this raw material transport cost and the laws for environment protection that have forbidden the extraction of natural ... See full document

... The dimensions of the type A and B buildings are listed in Table 4. Figure 4 shows the framework plan for the rectangular grid model. To simulate the behavior of the frames, leaving the beams cen- tered on ... See full document

... Based on the analysis of the results of 1885 compressive strength tests and 245 lexural strength tests, this study determined the acceptance parameters of the concrete batches that wer[r] ... See full document

... Table 2 illustrates the particle size analysis of cement and ly ash, while the X-Ray luorescence can be observed in table 3. Tests were conducted at LACER (Laboratory of Ceramics) at UFRGS. Table 4 illustrates the ... See full document

... The Eurocode [2] allows the design of reinforced concrete beams in ire situation using the tabular method (tables 1 and 2), which is associated with the time required for ire resistanc[r] ... See full document

... However, most of the existing calculation methods for that con- nection emphasize the socket design and detailing without in- cluding information and recommendations that describe the in- ternal behavior and design of ... See full document