[PDF] Top 20 Rev. IBRACON Estrut. Mater. vol.8 número3

... 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

... 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

... However, when analyzing a inished structure, a large number of these unknowns factors during the design phase, are already deined and can be measured, which justiies a modiication in actions increasing factors and in ... See full document

... The irst contribution is related to macromodeling research, which investigates the utilization and improvement of diagonal-strut mod- els. A number of important studies have been published since the 1970s. Relevant ... See full document

... The treatment of the progressive losses is more complex. These losses are interdependent, with the result of one altering the result of the other and visa-versa. The methods adopted by Prestress are those present in ... 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

... We are publishing the fourth issue of the eighth volume of the IBRACON Structures and Materials Journal. In this issue, the irst of eight articles presents interaction curves for concrete-encased com- posite ... See full document

... Weng and Yen [19] investigated the diferences between the approaches of code ACI 318 [20] and AISC/LRFD [16] for the design of composite steel–concrete columns fully encased with concrete and evaluated how their results ... See full document

... We are publishing the fourth issue of the eighth volume of the IBRACON Structures and Materials Journal. In this issue, the irst of eight articles presents interaction curves for concrete-encased com- posite ... 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

... 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

... Among the processes that reduce the durability of reinforced con- crete structures, reinforcement’s corrosion is mentioned as the ma- jor cause. The corrosion process produces the concrete cracking, cover spalling, loss ... See full document

... In general, the smooth models with lower compressive strength in the illed region showed slippage 2 or 3 times greater at rupture than the relative slip at the interface of the models[r] ... See full document

... Figures 8 and 9, a comparison is presented between design charts drawn for concretes of class up to C50 and for concrete class C90, respectively (both for the rectangular section called ... See full document

... It was used the algorithm “Calcula_TimeHistory” to generate the corresponding functions and this way to load the nodes of the computational model in order to obtain a time series of t[r] ... See full document

... The result graphics are the vertical displacement of the composite beam, bending moment and normal forces of each of the two beams and the connector shear force. The implementation was[r] ... See full document