Publications de Claire Acevedo

Measurement, Data Interpretation, and Uncertainty Propagation for Fatigue Assessments of Structures

Ian Smith, Claire Acevedo, Alain Nussbaumer, Romain Pasquier, James-Alexandre Goulet, Luca D'Angelo

Real behavior of existing structures is usually associated with large uncertainty that is often covered by the use of conservative models and code practices for the evaluation of remaining fatigue lives. In order to make better decisions related to retrofi ...

American Society of Civil Engineers2016

Improving Fatigue Evaluations of Structures Using In-Service Behavior Measurement Data

Ian Smith, Claire Acevedo, Romain Pasquier, James-Alexandre Goulet

Conservative models and code practices are usually employed for fatigue-damage predictions of existing structures. Direct in-service behavior measurements are able to provide more accurate estimations of remaining-fatigue-life predictions. However, these e ...

American Society of Civil Engineers2014

Numerical modelling and experimental investigation on welding residual stresses in large-scale tubular K-joints

Jean-Marie Drezet, Claire Acevedo, Alain Nussbaumer

This paper is devoted to the experimental and numerical assessment of residual stresses created by welding in the region surrounding the weld toe of tubular K-shaped joints (i.e. region most sensitive to fatigue cracking). Neutron-diffraction measurements ...

Wiley-Blackwell2013

Neutron diffraction investigations on residual stresses contributing to the fatigue crack growth in ferritic steel tubular bridges

Claire Acevedo, Alain Nussbaumer

Fatigue crack growth observed in tubular K-joint specimens, typical of tubular bridge structures, always initiates at the chord crown toe locations whether the applied stress range is tensile or compressive. Even though other locations around the weld have ...

Elsevier2012

Effect of tensile residual stresses on fatigue crack growth and S-N curves in tubular joints loaded in compression

Claire Acevedo, Alain Nussbaumer

The influence of welding tensile residual stresses on fatigue crack growth in bridge tubular K-joints is investigated through experimental testing of large-scale specimens. Crack development is monitored using the alternating current potential drop method. ...

Elsevier2012

Numerical investigation of welding residual stresses in planar bridge trusses made of CHS steel proﬁles

Claire Acevedo, Alain Nussbaumer, Farshid Zamiri Akhlaghi

The weld-induced residual stresses in a tubular planar K-shaped connection made of construction steel grades S355J2H and S690QH are evaluated using three-dimensional finite element models in thermo-mechanical simulation of welding process. Both lumped sing ...

CRC Press/Balkema2012

Numerical modeling and experimental investigation on welding residual stresses that influence the fatigue crack growth in tubular K-joints

Jean-Marie Drezet, Claire Acevedo, Alain Nussbaumer

2011

Influence of Residual Stresses on Fatigue Response of Welded Tubular K-Joints

Claire Acevedo

Seeking light and transparent bridge designs, engineers and architects have found an efficient and artistic way to fulfill their requirements: steel tubular bridges. In these modern tubular truss bridges, welded K-joints have been shown to be critically su ...

EPFL2011

Evaluation of residual welding stresses and fatigue crack behavior in tubular K-joints in compression

Jean-Marie Drezet, Claire Acevedo, Alain Nussbaumer

Tubular bridge design has to deal with fatigue issues. The fatigue susceptibility of these bridges, composed of circular hollow section profiles welded together in K-joints, is mainly due to stress concentrations, to welding imperfections and to tensile re ...

2011

Influence of welding residual stresses on stable crack growth in tubular K-joints under compressive fatigue loadings

Claire Acevedo, Alain Nussbaumer

Tubular bridge design has to deal with fatigue issues. The fatigue susceptibility of these bridges, composed of circular hollow section profiles welded together in K-joints, is mainly due to stress concentrations, to welding imperfections and to tensile re ...

CRC Press/Balkema, Taylor & Francis group2010

Residual stress estimation of welded tubular K-joints under fatigue loads

Claire Acevedo, Alain Nussbaumer

2009