[PDF] Top 20 Rev. IBRACON Estrut. Mater. vol.3 número3

... (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

... In reality, the performance of a building is governed by the inter- action between the superstructure, infrastructure and foundation soil, in a mechanism denominated structure soil interaction (SSI). Through this ... See full document

... concrete in the mid-span region, at the compressed face. Table [3] shows ultimate loads and modes of failure of all tested columns. Columns PC45T10 and PC45T12 revealed ultimate loads almost 5 times greater than ... See full document

... According to NBR 15 421 [3], the period of recurrence established as the basic criterion for deining the nominal values of horizontal accelerations is 475 years. ASCE [12] assumes the values of hori- zontal ... See full document

... poses the values that are indicated in table 1, which are based on ANSI/AISC 360-05, with some adjustments. To take into consider- ation a material with different behaviors in tension and in compres- sion, it was used ... See full document

... Investigating the mechanic strength of mortars with silica fume con- tents from 0 to 30% of the cement mass and water/binder ratios of 0.35, 0.40, 0.45, and 0.50, Rao [11] concluded that, during the irst ages (3 ... See full document

... The transportation along the EFC uses compositions with loco- motives (LM) type DAS9 and GDT wagons (WG). Two types of compositions are been more applied, one with 2 head locomotives and 104 wagons followed by more 1 ... See full document

... This paper presents an evaluation of the safety of circular con- crete illed columns, designed according to Brazilian design code (NBR 8800:2008 [1, 2]). The investigation is based on 32 experimen- tal results and on a ... See full document

... In the lack of experimental data, NBR 6118 suggests using k = 0.01µ. The tendon manufacture (Belgo [4]) speciies a value for the fric- tion coeficient µ between 0.06 and 0.07. NBR 6118 [3], on the other hand, ... See full document

... This is due, maybe, to the structural calculation, because this build- ing is relatively slender. Out of the 14 existent columns in the build- ing, 5 of them would demand intervention type I4 for which shoring would be ... See full document

... Speciically, regarding the numerical study of the shear stress on the reinforced concrete structures, there is a number of theoretical and experimental studies on concrete beam subjected to shear [1- 3] although ... See full document

... The strain-gages distribution in the reinforcement steel bars (bot- tom steel or stirrups) for the “T” beams can be observed in Figure 3. The data acquisition system ADS 2000 of the Lynx [13] was used together ... See full document

... GFRP reinforcement tensile tests were conducted at the EESC laboratory, but the results were inconclusive. Further tests are needed in order to establish the proper test procedure at the EESC laboratory. Therefore, the ... See full document

... • For both columns, at failure load, the tips of the bars had a normal stress value from 2 to 5 times the compressive strength of the concrete. For all the bars, the ratio betwe[r] ... See full document

... The specimens with initial notch depth 25 mm and width 2 mm were tested. The objective of the notch is to induce the fracture in a preferential plane and increase the stress to the notch top. Thus, during the specimen ... See full document

... In general, the designer does not have criteria to choose one or other model, usually choosing the most simpliied calculation model, without taking into account which model leads to smaller amounts of longitudinal and ... See full document

... with reduced density [3, 4]. Therefore, alternative materials have been studied to substitute these lightweight aggregate [5, 6]. Plastics waste, as ethylene vinyl acetate (EVA), has been used with relative ... See full document

... The non-linear analytical model proposed was based on the concept that FRP behavior can be adequately represented by a tri-linear mo- ment versus curvature relationship, as proposed by Charkas et al. [1], El-Mihilmy and ... See full document

... Figure 3 shows a signiicant environmental gain when cement is replaced with mineral additions, because more than 95% (except for the 90SFA with 87%) of the concrete CO 2eq emis- sions come from Portland ... See full document

... Bulk density of recycled and natural aggregates was determined by the method proposed in NM 45/00 – Aggregates – Determina- tion of bulk density and empty voids. For each type of aggregate, bulk density was determined ... See full document