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Alain Nussbaumer

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Publications associées (111)

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Using re-calibrated design S-N curves for fatigue assessment of road bridges

Alain Nussbaumer, Luca D'Angelo

Fatigue design of road bridges according to Eurocode standards can be based on damage accumulation, provided that information about loading spectrum is available. Characteristic values of fatigue resistance and load effects as well as partial safety factor ...

Wilhelm Ernst & Sohn2017

Welding simulation of tubular K-joints in steel S690QH

Alain Nussbaumer, Jean-Marie Drezet, Farshid Zamiri Akhlaghi

Residual stress state in planar tubular K-joints, in the chord within the gap region between the two braces, is studied using numerical weld modelling. The motivation comes from past full-scale fatigue tests on tubular trusses made of various steel grades ...

CRC press2015

Probabilistic fatigue analysis of a post-weld treated tubular bridge

Alain Nussbaumer, Scott Walbridge

In this paper, several probabilistic models for evaluating the fatigue performance of post-weld treated tubular bridge structures are briefly described. The application of the models is then demonstrated on a full-scale example bridge. Under realistic traf ...

2006

Model uncertainties in action effects and load bearing capacity calculation in statically indeterminate reinforced concrete structures

Aurelio Muttoni, Alain Nussbaumer, Xhemsi Malja

For the dimensioning and assessment of structures, it is common practice to compare action effects with sectional resistances. Extensive studies have been performed to quantify the model uncertainty on the resistance side. However, for statically indetermi ...

Ernst & Sohn2024

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

Alain Nussbaumer, Jean-Marie Drezet, Claire Acevedo

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

Multiaxial Fatigue Study on Transversal Attachments under constant amplitude proportional and non-proportional loadings

Alain Nussbaumer, Cláudio Alexandre Pereira Baptista, Martin Antonio René Garcia

MATEC Web of Conferences2018

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

Alain Nussbaumer, Claire Acevedo

2009

S-N-P Fatigue Curves using Maximum Likelihood

Eugen Brühwiler, Alain Nussbaumer, Luca D'Angelo, Marina Rocha Pinto Portela Nunes

ECCS European Convention for Constructional Steelwork2014

Probabilistic S-N curves for constant and variable amplitude

Alain Nussbaumer, Cláudio Alexandre Pereira Baptista

Welded details in steel bridges are subjected to fatigue lives up to 200.10(6) cycles due to traffic loads. While the majority of these stress ranges are below the Constant Amplitude Fatigue Limit (CAFL), some few high stress cycles can trigger the start o ...

Elsevier Sci Ltd2017

Size effects in the fatigue behaviour of welded tubular bridge joints

Alain Nussbaumer, Luís Costa Borges

Technische Universität Darmstadt2008

Fatigue of bridge joints using welded tubes or cast steel node solutions

Alain Nussbaumer, Senta Haldimann

In the design of recently constructed steel-concrete composite bridges using hollow section trusses for the main load carrying structure, the fatigue verification of the tubular truss joints has been a main issue. Recent research on the fatigue behaviour o ...

2006

Experimental testing and simulation of bolted beam-column connections having thick extended endplates and multiple bolts per row

Alain Nussbaumer, Gary Scott Prinz, Shyam Khadka

2012

Traffic load generation for the fatigue assessment of the 3rd Bosphorus bridge

Alain Nussbaumer, Cláudio Alexandre Pereira Baptista

This report presents the traffic simulation model for the fatigue life prediction of the stiffening cables and hangers from the 3rd Bosporus bridge in Istanbul, a 2164m long hybrid suspended/stay-cable bridge with a main span of 1408m. Probabilistic models ...

ICOM2015

Advanced numerical modelling of fatigue size effects in welded CHS K-joints bridges

Alain Nussbaumer, Luís Costa Borges

Taylor & Francis Group2008

A stethoscope for testing of bridges

Alain Nussbaumer, Manfred Hirt, Michel Thomann

Beim Überprüfen der Tragsicherheit einer bestehenden Brücke können dank Messungen die zur Berechnung der Beanspruchung entwickelten Modelle kalibriert werden. Im vorliegenden Aufsatz wird ein neues System von Dehnmessstreifen vorgestellt, welches den erfor ...

2007

Evaluation des ponts routiers existants avec un modèle de charge de trafic actualisé. Modélisation des dalles de roulement des ponts-poutres (Rapport interne EPFL n° 306891-2). - Édition 2024 V1.01

Alain Nussbaumer

EPFL Ecole polytechnique fédérale de Lausanne2024

Fatigue strengthening of riveted girders in a historic railway metallic bridge in Switzerland using pre-stressed un-bonded CFRP laminates

Alain Nussbaumer, Elyas Ghafoori, Masoud Motavalli, Gary Scott Prinz, Andrin Herwig, Mario Fontana

CRC Press2016

A probabilistic model for determining the effect of post-weld treatment on the fatigue performance of tubular bridge joints

Alain Nussbaumer, Scott Walbridge

Herein, a probabilistic model for predicting the effect of post-weld treatment on the fatigue performance of the welded joints in tubular truss bridges is described. Specifically, a probabilistic LEFM-based model is first developed for the fatigue analysis ...

2007

Stethoscope pour l'auscultation des ponts

Alain Nussbaumer, Manfred Hirt, Michel Thomann

espazium2006

European standard for fatigue design of steel structures and perspectives

Alain Nussbaumer

2006