[PDF] Top 20 Rev. IBRACON Estrut. Mater. vol.4 número3

... Revista IBRACON de Estruturas e Ma- teriais (Volume 4, Número 3, de agosto de 2011), com oito artigos discutindo temas relevantes rela- cionados a estruturas e materiais de ... See full document

... Figure 4, with the chosen distribution and this reinforce- ment ratio the program arrives in a cross-section consisting of twelve 20 mm rebars, the inal cross-section is shown in Figure ... See full document

... deviations and coefficient of variance (c.v.) in percent- age. Figure 7 shows the bar graphics with the compres- sive strength of the concrete block (B), the compressive strength of the mortars (des- ignated here as ... 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

... 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

... Based on the exposed concepts, it is to be expected that LTE af- fects the performance of concrete pavements as well as seasonal changes over time. According to the American Concrete Pavement Association [3], the LTE ... See full document

... Thirty concrete specimens were cast, leading to ifteen families of concrete with two specimens each. These specimens were cut (see igure 1) from 2 different cylinders of 10 cm in diameter. A disc saw was used to cut the ... 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

... The axial compression test is normally done following procedures given by standards such as the European EN 12390 [2] and the Brazilian NBR 5739 [3], or standard practices such as the one pro- vided in the ACI 214.4R-03 ... See full document

... had been reached, making it impossible for the shear reinforce- ment were requested in order to provide an increase in the failure loads. In relation to punching reinforcements, they provide signii- cant gains for ... See full document

... The results presented in Table 9 and Figure 1 indicate that despite the mixtures A1-2 and A1-3 have shown low levels of incorporated air content, their compressive strength is lower th[r] ... See full document

... The authors believe that there is ample space for improvements of structural design codes in Brazil. However, changes can only be pro- posed if the current codes of practice are strictly followed. In particular, the ... See full document

... This technical note describes the implementation of the Levenberg-Marquardt algorithm for the inverse analysis of three-point bend tests on notched specimens of plain and fi ber reinforc[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

... 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

... 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

... 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

... 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