[PDF] Top 20 Rev. IBRACON Estrut. Mater. vol.8 número5

... We are publishing the October 2015 issue of the IBRACON Structures and Materials Journal (Volume 8 Number 5, October 2015). This issue contains eight articles on concrete structures and materials, a ... See full document

... The quasi-brittle, loading rate dependent behaviour of the concrete, characterized by a fracture process zone (FPZ) ahead of the crack front, can be described through a viscous-cohesive[r] ... See full document

... excerpt from the introduction and Flowchart 1 of the standard), and justify the use of the criteria adopted in Section 4.2.4 with a view that in cases of non-compliance in structures u[r] ... See full document

... de um trecho da introdução e do Flowchart 1 da norma), e justii - cam o uso do critério adotado na Seção 4.2.4 tendo em vista que, nos casos de não conformidade em estruturas ainda em c[r] ... See full document

... Although the example does not presents the cylinder tests results, the compressive strength values obtained from 8 cores produced much smaller results (f c, max = 19,1 MPa) than the values specifi ed in design. The ... See full document

... A Seção 4.2.4 não deixa claro se os procedimentos são váli- dos para estrutura em construção (ou nova) com problemas de conformidade ou para estruturas existentes, e omite o fato que a[r] ... See full document

... Moreover, the natural frequencies and modal shapes, which were based on the properties of the elements assigned to the structure, were obtained from the numerical model performed, via [r] ... See full document

... ventive treatment. This fact turns concrete durability conditioned to its coninement and, due to the restriction of crack propagation pro- vided by the ibers, the resistance to the entry of aggressive agents in- creases ... See full document

... ratio, 8% of the macrofibers are outside the ±50% tolerance, and the average aspect ratio is within the tolerance of ±10% compared to the nominal ...because 8% of the macrofibers were not within the ... See full document

... In a general way the stresses on the concrete solid mass at the “y” direction remained stable presenting magnitudes far below its tensile strength, as shown by the ields of igures 15 and 16. For the columns referring to ... See full document

... Among the issues to be clariied for the understanding of aggregate grain shape are: if there is an efect regarding the type of sample preparation, which should be the in- crease[r] ... See full document

... Courard et al. [9] refer to surface treatments on the concrete sub- strate to promote the mechanical interlocking. The most commonly used treatment is to increase the surface roughness by diferent methods abrasion. ... See full document

... observed in reinforced concrete structures [7] and the most costly as far as maintenance if concerned [1]. However, engineers do not usually perceive the need for a proper cover as a priority and there- fore do not give ... See full document

... So as to perform a benchmark between the different codes, is pres- ents below an exemple of a structure that knows that was designed with a f’ c equal to 25MPa, where was adopted some data from core tests (Table 6), and ... See full document

... These mixtures can be used like backill material in soil retaining walls replacing the clayey soil due to its better strength and shear behavior and low unit weight.. A numerical simula[r] ... See full document

... hydraulic conductivity values were similar for all the three mixes in both falling and constant head tests, indicating that the variation of the coarse aggregate gradation used in this[r] ... See full document

... As the ib Model Code 2010 does not present neither instructions to estimate the punching strength of slabs supported on rectan- gular columns, nor provisions to treat the cases where th[r] ... See full document

... There are already researches that present the infrared thermogra- phy as an eficient technique to evaluate defects at FRP/Concrete interface. One of them[7] uses water and air-illed debonds in dif- ferent sizes. These ... See full document

... Size effect is an important issue in concrete structures bearing in mind that it can inluence many aspects of analysis such as strength, brittleness and structural ductility, fracture [r] ... See full document

... Several reports of experimental tests on concrete and ceramic blocks ([3], [4], [5]) indicate that it is not valid to simply add a grout- ed area to the hollow ungrouted section to determine the prism strength. According ... See full document