(Created page with "==1 Title, abstract and keywords<!-- Your document should start with a concise and informative title. Titles are often used in information-retrieval systems. Avoid abbreviatio...")
 
m (Cinmemj moved page Draft Samper 949303407 to Prieto et al 2014a)
 
(One intermediate revision by the same user not shown)
Line 1: Line 1:
==1 Title, abstract and keywords<!-- Your document should start with a concise and informative title. Titles are often used in information-retrieval systems. Avoid abbreviations and formulae where possible. Capitalize the first word of the title.
+
==Abstract==
  
Provide a maximum of 6 keywords, and avoiding general and plural terms and multiple concepts (avoid, for example, 'and', 'of'). Be sparing with abbreviations: only abbreviations firmly established in the field should be used. These keywords will be used for indexing purposes.
+
Corrosion can affect bond between reinforcing bars and concrete and with it the transfer of longitudinal stresses between both materials. Loss of bond is normally characterized by brittle behaviour thus it should be analysed within the framework of the assessment of damaged structures in order to avoid it. Factors that affect bond strength include the weakening of the steel bar confinement due to cracking of the concrete cover and/or stirrup corrosion, development of corrosion products at the interface, and, in the case of ribbed bars, reduction of the relative rib area due to cross-section loss in the steel. A number of experimental studies have been conducted in recent years on bond failure, the findings have diverged rather widely, however, due primarily to differing test conditions.
  
An abstract is required for every document; it should succinctly summarize the reason for the work, the main findings, and the conclusions of the study. Abstract is often presented separately from the article, so it must be able to stand alone. For this reason, references and hyperlinks should be avoided. If references are essential, then cite the author(s) and year(s). Also, non-standard or uncommon abbreviations should be avoided, but if essential they must be defined at their first mention in the abstract itself. -->==
+
In an attempt to surmount the inconsistencies in bond prediction with corroded steel bars, eccentric pull-out tests were carried out with specimens subjected to both accelerated and natural corrosion [1]. In this study a semi-empirical formulation accounting for both pull-out and splitting failures is proposed to assess bond of corroded and non-corroded steel bars. This formulation is obtained by means of multiple linear regression analysis of a database of more than 650 tests of corroded and non-corroded bond tests, including the tests performed in [1]. The database used includes a wide range of influencing variables regarding to bond, such as bar diameter, concrete strength, concrete cover, anchorage length, confinement ratio and cross-section loss due to corrosion. Several statistical criteria have been used to analyse the proposed formulation and the influence of the explanatory variables. Also a comparison with several formulations found in literature, including the proposal of Fib Model Code 2010 for corroded bars is performed. The proposed formulation could be used in the structural assessment of corroded reinforced concrete beams.
  
 +
==Resumen==
  
 +
La corrosión puede afectar la adherencia entre las armaduras y el hormigón y con ella la transferencia de las tensiones longitudinales entre ambos materiales. La pérdida de adherencia suele presentar un comportamiento frágil por lo que debe ser analizado en el marco de las estructuras deterioradas con el fin de evitar que se produzca. Los factores que afectan a la adherencia incluyen el debilitamiento del confinamiento debido a la fisuración del recubrimiento de hormigón y/o la corrosión de los cercos, desarrollo de los productos de corrosión en la interfaz y en el caso de las armaduras corrugadas, la reducción de área proyectada de las corrugas debido a la pérdida de sección del acero.
  
 +
En los últimos años se han realizado algunos estudios experimentales sobre los fallos de adherencia con armaduras corroídas, los resultados obtenidos han presentado gran disparidad, debido fundamentalmente a las diferentes condiciones experimentales.
  
==2 The main text<!-- You can enter and format the text of this document by selecting the ‘Edit’ option in the menu at the top of this frame or next to the title of every section of the document. This will give access to the visual editor. Alternatively, you can edit the source of this document (Wiki markup format) by selecting the ‘Edit source’ option.
+
En un intento de superar las inconsistencias en la predicción de la adherencia con armaduras corroídas, se han llevado a cabo ensayos de tipo pull-out excéntrico con probetas sometidas a corrosión acelerada y corrosión natural [1]. En este trabajo se propone una formulación semi-empírica para la evaluación conjunta de la adherencia de armaduras corroídas y sanas que incorpora tanto los fallos de adherencia por pull-out como de splitting. La formulación se ha obtenido mediante un análisis de regresión múltiple de más de 650 ensayos de adherencia con armaduras sanas y corroídas incluyendo los ensayos realizados en [1]. La base de datos incluye una gran variedad de variables influyentes en la adherencia, tales como el diámetro de la armadura, resistencia del hormigón, recubrimiento, longitud de anclaje, ratio de confinamiento por armadura transversal y pérdida de sección por corrosión. Distintos criterios estadísticos se han utilizado para analizar la formulación propuesta y la influencia de las variables explicativas. También se ha realizado una comparación con distintas formulaciones disponibles en la literatura, incluyendo la propuesta en el Fib Model Code 2010 para la adherencia de armaduras corroídas. La formulación propuesta en este trabajo se puede emplear para la evaluación estructural de vigas de hormigón armado con armaduras corroídas.
 
+
Most of the documents in Scipedia are written in English (write your manuscript in American or British English, but not a mixture of these). Anyhow, specific publications in other languages can be published in Scipedia. In any case, the documents published in other languages must have an abstract written in English.
+
 
+
 
+
2.1 Subsections
+
 
+
Divide your article into clearly defined and numbered sections. Subsections should be numbered 1.1, 1.2, etc. and then 1.1.1, 1.1.2, ... Use this numbering also for internal cross-referencing: do not just refer to 'the text'. Any subsection may be given a brief heading. Capitalize the first word of the headings.
+
 
+
 
+
2.2 General guidelines
+
 
+
Some general guidelines that should be followed in your manuscripts are:
+
 
+
*  Avoid hyphenation at the end of a line.
+
 
+
*  Symbols denoting vectors and matrices should be indicated in bold type. Scalar variable names should normally be expressed using italics.
+
 
+
*  Use decimal points (not commas); use a space for thousands (10 000 and above).
+
 
+
*  Follow internationally accepted rules and conventions. In particular use the international system of units (SI). If other quantities are mentioned, give their equivalent in SI.
+
 
+
 
+
2.3 Tables, figures, lists and equations
+
 
+
Please insert tables as editable text and not as images. Tables should be placed next to the relevant text in the article. Number tables consecutively in accordance with their appearance in the text and place any table notes below the table body. Be sparing in the use of tables and ensure that the data presented in them do not duplicate results described elsewhere in the article.
+
 
+
Graphics may be inserted directly in the document and positioned as they should appear in the final manuscript.
+
 
+
Number the figures according to their sequence in the text. Ensure that each illustration has a caption. A caption should comprise a brief title. Keep text in the illustrations themselves to a minimum but explain all symbols and abbreviations used. Try to keep the resolution of the figures to a minimum of 300 dpi. If a finer resolution is required, the figure can be inserted as supplementary material
+
 
+
For tabular summations that do not deserve to be presented as a table, lists are often used. Lists may be either numbered or bulleted. Below you see examples of both.
+
 
+
1. The first entry in this list
+
 
+
2. The second entry
+
 
+
2.1. A subentry
+
 
+
3. The last entry
+
 
+
* A bulleted list item
+
 
+
* Another one
+
 
+
You may choose to number equations for easy referencing. In that case they must be numbered consecutively with Arabic numerals in parentheses on the right hand side of the page. Below is an example of formulae that should be referenced as eq. (1].
+
 
+
 
+
2.4 Supplementary material
+
 
+
Supplementary material can be inserted to support and enhance your article. This includes video material, animation sequences, background datasets, computational models, sound clips and more. In order to ensure that your material is directly usable, please provide the files with a preferred maximum size of 50 MB. Please supply a concise and descriptive caption for each file. -->==
+
 
+
 
+
 
+
 
+
==3 Bibliography<!--
+
Citations in text will follow a citation-sequence system (i.e. sources are numbered by order of reference so that the first reference cited in the document is [1], the second [2], and so on) with the number of the reference in square brackets. Once a source has been cited, the same number is used in all subsequent references. If the numbers are not in a continuous sequence, use commas (with no spaces) between numbers. If you have more than two numbers in a continuous sequence, use the first and last number of the sequence joined by a hyphen
+
 
+
You should ensure that all references are cited in the text and that the reference list. References should preferably refer to documents published in Scipedia. Unpublished results should not be included in the reference list, but can be mentioned in the text. The reference data must be updated once publication is ready. Complete bibliographic information for all cited references must be given following the standards in the field (IEEE and ISO 690 standards are recommended). If possible, a hyperlink to the referenced publication should be given. See examples for Scipedia’s articles [1], other publication articles [2], books [3], book chapter [4], conference proceedings [5], and online documents [6], shown in references section below. -->==
+
 
+
 
+
 
+
 
+
==4 Acknowledgments<!-- Acknowledgments should be inserted at the end of the document, before the references section. -->==
+
 
+
 
+
 
+
 
+
==5 References<!--[1] Author, A. and Author, B. (Year) Title of the article. Title of the Publication. Article code. Available: http://www.scipedia.com/ucode.
+
 
+
[2] Author, A. and Author, B. (Year) Title of the article. Title of the Publication. Volume number, first page-last page.
+
 
+
[3] Author, C. (Year). Title of work: Subtitle (edition.). Volume(s). Place of publication: Publisher.
+
 
+
[4] Author of Part, D. (Year). Title of chapter or part. In A. Editor & B. Editor (Eds.), Title: Subtitle of book (edition, inclusive page numbers). Place of publication: Publisher.
+
 
+
[5] Author, E. (Year, Month date). Title of the article. In A. Editor, B. Editor, and C. Editor. Title of published proceedings. Paper presented at title of conference, Volume number, first page-last page. Place of publication.
+
 
+
[6] Institution or author. Title of the document. Year. [Online] (Date consulted: day, month and year). Available: http://www.scipedia.com/document.pdf.
+
-->==
+

Latest revision as of 15:32, 28 May 2020

Abstract

Corrosion can affect bond between reinforcing bars and concrete and with it the transfer of longitudinal stresses between both materials. Loss of bond is normally characterized by brittle behaviour thus it should be analysed within the framework of the assessment of damaged structures in order to avoid it. Factors that affect bond strength include the weakening of the steel bar confinement due to cracking of the concrete cover and/or stirrup corrosion, development of corrosion products at the interface, and, in the case of ribbed bars, reduction of the relative rib area due to cross-section loss in the steel. A number of experimental studies have been conducted in recent years on bond failure, the findings have diverged rather widely, however, due primarily to differing test conditions.

In an attempt to surmount the inconsistencies in bond prediction with corroded steel bars, eccentric pull-out tests were carried out with specimens subjected to both accelerated and natural corrosion [1]. In this study a semi-empirical formulation accounting for both pull-out and splitting failures is proposed to assess bond of corroded and non-corroded steel bars. This formulation is obtained by means of multiple linear regression analysis of a database of more than 650 tests of corroded and non-corroded bond tests, including the tests performed in [1]. The database used includes a wide range of influencing variables regarding to bond, such as bar diameter, concrete strength, concrete cover, anchorage length, confinement ratio and cross-section loss due to corrosion. Several statistical criteria have been used to analyse the proposed formulation and the influence of the explanatory variables. Also a comparison with several formulations found in literature, including the proposal of Fib Model Code 2010 for corroded bars is performed. The proposed formulation could be used in the structural assessment of corroded reinforced concrete beams.

Resumen

La corrosión puede afectar la adherencia entre las armaduras y el hormigón y con ella la transferencia de las tensiones longitudinales entre ambos materiales. La pérdida de adherencia suele presentar un comportamiento frágil por lo que debe ser analizado en el marco de las estructuras deterioradas con el fin de evitar que se produzca. Los factores que afectan a la adherencia incluyen el debilitamiento del confinamiento debido a la fisuración del recubrimiento de hormigón y/o la corrosión de los cercos, desarrollo de los productos de corrosión en la interfaz y en el caso de las armaduras corrugadas, la reducción de área proyectada de las corrugas debido a la pérdida de sección del acero.

En los últimos años se han realizado algunos estudios experimentales sobre los fallos de adherencia con armaduras corroídas, los resultados obtenidos han presentado gran disparidad, debido fundamentalmente a las diferentes condiciones experimentales.

En un intento de superar las inconsistencias en la predicción de la adherencia con armaduras corroídas, se han llevado a cabo ensayos de tipo pull-out excéntrico con probetas sometidas a corrosión acelerada y corrosión natural [1]. En este trabajo se propone una formulación semi-empírica para la evaluación conjunta de la adherencia de armaduras corroídas y sanas que incorpora tanto los fallos de adherencia por pull-out como de splitting. La formulación se ha obtenido mediante un análisis de regresión múltiple de más de 650 ensayos de adherencia con armaduras sanas y corroídas incluyendo los ensayos realizados en [1]. La base de datos incluye una gran variedad de variables influyentes en la adherencia, tales como el diámetro de la armadura, resistencia del hormigón, recubrimiento, longitud de anclaje, ratio de confinamiento por armadura transversal y pérdida de sección por corrosión. Distintos criterios estadísticos se han utilizado para analizar la formulación propuesta y la influencia de las variables explicativas. También se ha realizado una comparación con distintas formulaciones disponibles en la literatura, incluyendo la propuesta en el Fib Model Code 2010 para la adherencia de armaduras corroídas. La formulación propuesta en este trabajo se puede emplear para la evaluación estructural de vigas de hormigón armado con armaduras corroídas.

Back to Top

Document information

Published on 01/01/2014

DOI: 10.2749/222137814814027981
Licence: CC BY-NC-SA license

Document Score

0

Views 4
Recommendations 0

Share this document

claim authorship

Are you one of the authors of this document?