Volumes
 
ISSN 1983-4195
Vol1 - Num3
2008
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Editorial

We are now releasing the third issue of our IBRACON Structures and Materials Journal (Vol. 1 Num. 3). This issue brings a paper discussing safety of concrete-filled steel tubular columns according to Brazilian code NBR 8800:2008. Based on a reliability analysis for these columns, the authors suggest changes to the proposed text for updating this code. A second article addresses in situ evaluation of stress losses in unbonded tendons of post tensioned flat slabs of a sixteen-floor building in Belo Horizonte. The influence
of compression bars spacing on the behavior of contact and noncontact lap compression splices is evaluated in a third paper. An experimental analysis on the performance of reinforced concrete beams reinforced with GFRP bars is addressed in a fourth paper. The last paper presents a study of the optimum struts and ties angles for the models recommended by NBR 6118:2003, aiming at minimum steel consumption in reinforced concrete beams.
The papers have been carefully reviewed by the Editorial Board and highly qualified reviewers from Brazil and from abroad. We thank them for their support. We congratulate the authors of the papers presented in this issue. Again we invite all the concrete community in Brazil and abroad to participate in the activities of the IBRACON Structures and Materials Journal, as a frequent reader or as a contributor.

Américo Campos Filho, José Luiz Antunes de O. e Sousa and Paulo Roberto do Lago Helene, Editors

 
Vol1 - Num2
2008
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Editorial

We are pleased to release the second issue of the first volume of the IBRACON Structures and Materials Journal. This issue brings two articles on the recycling of residues: the first discusses the influence of surface treatment of tire rubber residues on mortars, and the other on the effect of the type of recycled aggregate from construction residues on the module of deformation of the concrete. Another article applies the strut-and-tie model to the study of deformations on the compressive diagonals in two-pile caps. A fourth article focuses on the compression in concrete masonry wallettes with cement mortar overlays. The last article analyzes the distribution of bending moments in RC buildings. All these topics are relevant and up-to-date, and certainly will raise the interest of our community. As usual, the papers have been reviewed by the Editorial Board, and by reviewers selected among IBRACON members, from Brazil and from abroad, with acknowledged competence in the specific areas. We thank the effort and dedication of the reviewers who have been collaborating for the consolidation of our Journal as a vehicle of recognized quality. We reiterate our invitation to the IBRACON members and other readers to submit their contributions to the IBRACON Structures and Materials Journal.

Américo Campos Filho, José Luiz Antunes de O. e Sousa and Paulo Roberto do Lago Helene, Editors

 
Vol1 - Num1
2008
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Editorial

We are pleased to release the first issue of the IBRACON Structures and Materials Journal, result of the combination between the IBRACON Structural Journal and the IBRACON Materials Journal. This new Journal will cover distinct topics of material concrete and its structural applications. We plan from 4 to 6 issues per year, each containing 5 to 8 articles, technical notes and technical discussions. These will be peer-to-peer reviewed by an Editorial Board and by reviewers chosen among IBRACON´s member with acknowledged competence in the specific areas. Articles will be published in English, in order to aid the diffusion of the national technology and its interaction with our international counterparts, with an option to publish also a version in Portuguese or Spanish. The review process may be conducted in English, Portuguese or Spanish, and, when necessary, translated into English after the manuscript is approved. Publication in Portuguese or Spanish is optional. Articles previously submitted to RIEst or RIMat, and not yet published, are automatically considered for publication in this new Journal. The Internet access to this new journal uses a public domain management and publishing system, made available by the PKP- Public Knowledge Project (http://pkp.sfu.ca/ojs/). A link to the online system is available in IBRACON´s web site (http://www.ibracon.org.br/).

We thank and congratulate the authors of the papers selected for this first issue. We hope that their pioneer work will be remembered in the future as a symbol of national concrete engineering. We would like also to thank the Board of Directors of IBRACON, for their trust and continuous support towards the achievement of this mission.

In this opportunity we invite all the concrete community to participate in the activities of IBRACON Structures and Materials Journal, as a frequent reader or as a contributor. This is a victory of all the Brazilian concrete community. Therefore, we extend our congratulations to all the participants of IBRACON for this accomplishment that clearly demonstrates the strength and capacity of our country.

Américo Campos Filho, José Luiz Antunes de Oliveira e Sousa e Paulo Roberto do Lago Helene, Editors