A simplified model for long term behaviour of anchor bolt

Authors: F. Delhomme, G. Debicki, D. Baroudi
Paper category: conference
Book title: Concrete Durability and Service Life Planning – ConcreteLife’09
Editor(s): K. Kovler
Print ISBN: 978-2-35158-074-5
e-ISBN: 978-2-35158-085-1
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 359 – 366
Total Pages: 8
Language: English

Abstract: The fastening between a metallic component and a concrete block is an essential point in stability and durability of the structure. This joint has to transfer deadweight of the structure and tensile, compressive and shearing loads created by the structure in service. This study focuses on the fastenings constituted of long anchor bolts cast in place. The anchor rods are prestressed in order to decrease the tensile stresses due to cyclic loadings. To design these anchors the long term behaviour of concrete is not taken into account whereas the concrete creep involves a decrease of the initial stress level.
This paper presents a mass-spring modelling of the long term behaviour of headed stems. The model takes into account concrete and rod stiffnesses from experimental data. By using the creep law given in Eurocode 2, the modelling of the evolution of the preloading shows a good agreement with the measurements obtained in relaxation tests conducted at LGCIE.

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00