Modelling and parametric study of the re-anchorage of ruptured tendons in bonded post-tensioned concrete

The contribution of ruptured tendons to the residual strength of bonded post-tensioned concrete structures is currently assessed based on pre-tensioned concrete bond models. However, this approach is inaccurate due to the inherent differences between pre-tensioned and post-tensioned concrete. In this paper, a non-linear 3D finite element model is developed for the re-anchoring of a ruptured tendon in post-tensioned concrete. The model is validated using full-field displacement measurement from 33 post-tensioned concrete prisms and previous experimental data on beams from the literature. The influence of different parameters was investigated, including tendon properties (i.e. diameter, roughness), duct properties (i.e. diameter, thickness, material), initial prestress, concrete strength, grout strength, grout voids, stirrups, and strands, on the tendon re-anchorage. The most influential parameters are found to be tendon and duct properties

Main flexible pavement and mix design methods in Europe and challenges for the development of an european method

Pavement and mix design represent one of the key components within the life cycle of a road infrastructure, with links to political, economic, technical, societal and environmental issues. Recent researches related to the characteristics of materials and associated behavior models both for materials and pavement, made it appropriate to consider updating current pavement design methods, and especially in the USA this has already been in process while in Europe uses of the methods developed in the early 1970s. Thus, this paper firstly presents a brief historical overview of pavement design methods, highlighting early limitations of old empirical methods. Afterwards, French, UK and Shell methods currently in use in Europe will be presented, underlining their main components in terms of methodology, traffic, climatic conditions and subgrade. The asphalt mix design and modeling in Europe are presented with their inclusion in the pavement design methods. Finally, the main challenges for the development of a European pavement design method are presented as well as the recent research developments that can be used for that methodThe second author would like to express the support of Portuguese National Funding Agency for Science, Research and Technology (FCT) through scholarship SFRH/BSAB/114415/ 2016. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.info:eu-repo/semantics/publishedVersio

Annales des ponts et chaussées.

Description based on: 9e. sér., 81e. année, t. 1 (1911).Subtitle varies."Mémoires et documents relatifs à l'art des constructions et au service de l'ingénieur."Ser. 1-7 comprise 20 v. each.Volume numbers irregular: ser. 7 [v. 13, pt. 2-v. 20] 1897-1900, called ser. 7, "année" 7-10; ser. 8-11, 1901-21, called also "année" 71-91; ser. 9, v. 40 repeated in numbering.Includes supplements.Mode of access: Internet.Imprint varies: 1831-1900, Vve C. Dunod; 1901-Feb. 1908, E. Bernard.Ser. 1, 1831-40. 1 v.; Ser. 2, 1841-50. 1 v.; Ser. 3, 1851-60. 1 v.; Ser. 4, v. 11-20, 1866-1870, with index to ser. 4, v. 1-10; Ser. 5, v. 1-10, 1871-75. 1 v.; Ser. 6, 1881-90. 1 v.; Ser. 7, 1891-1900. 1 v.; 1911-1949. 1v.; 1950-1951. 1v

Cours de chemins de fer.

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Rapport general d'activite 2003 - Laboratoire Central des Ponts et Chaussees

SIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : 14445 B / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

La mesure des deformations a l'aide des extensometres amovibles LPC

SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : RP 10650 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Mise en peinture des betons de genie civil

Available from INIST (FR), Document Supply Service, under shelf-number : 22989, issue : a.1999 n.502383 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueSIGLEFRFranc