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Alain Nussbaumer

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Related publications (111)

Cyclic demand at the shell-bottom connection of unanchored steel tanks

Alain Nussbaumer, Gustavo Cortes, Gary Scott Prinz

Gasoline and other oil byproducts are commonly stored in steel tanks that rest on ground without any anchorage. Under strong motion, the impulsive mass of the contained liquid generates a moment about the base of the tank capable of causing partial uplift ...

2012

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

Evaluation of Eurocode damage equivalent factor based on traffic simulation

Alain Nussbaumer, Nariman Maddah

2012

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

Evaluation of damage equivalent factor for roadway bridges

Alain Nussbaumer, Nariman Maddah

IABSE AND IASS2011

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

Experimental Determination of the Capacity of Wall-to-Base Connections in Storage Tanks

Alain Nussbaumer, Eric Lattion, Gustavo Cortes

Earthquakes around the world have affected many unanchored tanks used for storage of gasoline. When these unanchored tanks are subjected to strong motion, the moment generated at the base, by the mass of liquid contained in the tank, will cause partial upl ...

Elsevier2011

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

Claire Acevedo, Alain Nussbaumer

CRC Press/Balkema, Taylor & Francis group2010

Modelling fatigue crack propagation of a cracked metallic member reinforced by composite patches

Alain Nussbaumer

The concept of fracture for material elements at front of a crack for fatigue crack propagation was extended to the fatigue crack propagation of a cracked metallic member reinforced with a composite patch in this paper. From static mechanics and linear ela ...

Elsevier2009

A critical examination of the size effect correction for welded steel tubular joints

Alain Nussbaumer, Ann Schumacher, Luís Costa Borges

Welded circular hollow section (CHS) joints typical to bridge construction have been examined in an experimental, numerical, and analytical study with respect to their fatigue strength. Evidence from this study has indicated lower fatigue strength for join ...

Elsevier Ltd.2009

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

Claire Acevedo, Alain Nussbaumer

2009

Experimental determination of stress intensity factors on large-scale tubular trusses fatigue tests

Alain Nussbaumer, Luís Costa Borges

Taylor & Francis Group2008

A probabilistic assessment of the effect of post-weld treatment on the fatigue performance of tubular truss bridges

Alain Nussbaumer, Scott Walbridge

In the design of tubular truss bridges, engineers have found the fatigue performance of the joints to be a critical aspect. In looking for ways to improve this performance, the use of residual stress-based post-weld treatments has been suggested. Although ...

Elsevier2008

Size effects in the fatigue behaviour of welded CHS bridge joints

Alain Nussbaumer, Luís Costa Borges

ECCS2008

Probabilistic fatigue analysis of shop and field treated tubular truss bridges

Alain Nussbaumer, Scott Walbridge

This article examines the extent to which post-weld treatment by needle peening can improve the fatigue performance of tubular truss bridges. To do this, the various potential crack sites on several variants of a typical bridge are analyzed using a probabi ...

Elsevier2008

Size effects in the fatigue behavior of welded tubular bridge joints

Alain Nussbaumer, Luís Costa Borges

Tubular space trusses for bridge applications use thick-walled tubes. The reduction in fatigue resistance due to geometrical size effects is thus an important issue. In order to carry out a thorough study, both fatigue tests on large-scale specimens and ad ...

Wiley-Blackwell2008

Size effects in the fatigue behaviour of welded tubular bridge joints

Alain Nussbaumer, Luís Costa Borges

Technische Universität Darmstadt2008

Fatigue design of cast steel nodes in tubular bridge structures

Senta Haldimann, Alain Nussbaumer

Due to their aesthetic and structural advantages, tubular space truss structures are enjoying increasing popularity in modern bridge construction. The use of cast steel nodes for the joints between the circular hollow section members is also becoming incre ...

Elsevier2008

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