Recherche

Afficher tous les résultats pour

Accueil

Personne

Alain Nussbaumer

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (111)

New framework for calibration of partial safety factors for fatigue design

Alain Nussbaumer, Luca D'Angelo

In Eurocode standards, three verification schemes are proposed for fatigue design under variable amplitude loadings: 1) Based on constant amplitude fatigue limit; 2) Based on constant amplitude equivalent stress range at 2.10 cycles; 3) Based on accumulate ...

Elsevier Sci Ltd2017

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

A novel mechanical clamp for strengthening of steel members using prestressed CFRP plates

Alain Nussbaumer, Elyas Ghafoori, Ardalan Hosseini, Masoud Motavalli

Strengthening of existing steel members using prestressed carbon fiber reinforced polymer (CFRP) plates has certain advantages over non-prestressed reinforcement, especially due to the reduction in permanent tensile stresses acting on the steel members. Ho ...

2017

Probabilistic S-N curves for constant and variable amplitude

Alain Nussbaumer, Cláudio Alexandre Pereira Baptista, António José Luís dos Reis

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

Fatigue behaviour of CHS tubular bracings in steel bridges

Alain Nussbaumer, Saad Kannuna, Cláudio Alexandre Pereira Baptista, José Joaquim Costa Branco de Oliveira Pedro

The structural solution for cross girder bracings or box girder diaphragms in steel bridges is often made with tubular elements, specially efficient if compression is required for structural behaviour. The connection between the tubular elements and the gi ...

Elsevier2017

Experimental investigation of multi-span post-tensioned glass beams

Alain Nussbaumer, Pieter Christian Louter, Jagoda Cupac

This paper presents a study on post-tensioned glass beams in a statically indeterminate system. In order to increase the safety of structural glass beams, ductile reinforcement can be added to glass beam sections providing secondary load carrying mechanism ...

Springer Nature2017

Laminated connections for structural glass components: a full-scale experimental study

Alain Nussbaumer, Pieter Christian Louter, Manuel Santarsiero

The use of glass material for structural components has drastically increased in the last decade. Among others, a laminated connection is a type of adhesive joint that makes use of foil interlayer adhesive to transfer forces between glass and metal parts. ...

Springer International Publishing Ag2017

Fatigue strengthening of cracked steel plates using prestressed unbonded CFRP reinforcements

Alain Nussbaumer, Elyas Ghafoori, Ardalan Hosseini, Masoud Motavalli

Fatigue strengthening of existing steel structures is of great importance and has attracted lots of interest recently. Apart from the conventional strengthening technique, i.e. utilizing bulky and heavy steel plates and its disadvantages, carbon fiber rein ...

2017

Estimation of fatigue S-N curves of welded joints using advanced probabilistic approach

Alain Nussbaumer

This paper provides a new advanced probabilistic approach for reliable estimation of the fatigue characteristic S-N curves of welded joints both for constant amplitude (CA) and variable amplitude (VA) loading conditions. The presented approach, which is re ...

Elsevier2017

Very high cycle fatigue tests with quenched and self-tempered reinforcement steel bars

Eugen Brühwiler, Alain Nussbaumer, Marina Rocha Pinto Portela Nunes

Investigations on the fatigue strength of steel reinforcement bars (rebars) mainly involves fatigue tests with hot rolled (HR) and cold worked (CW) steels. However, in the last few decades, HR and CW rebars were replaced by quenched and selftempered (QST) ...

Springer Verlag2016

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

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

CRC Press2016

Round robin on local stress evaluation for fatigue by various FEM software

Alain Nussbaumer, Vasileios Grigoriou

The objective of this Round Robin is to assess the software influence on the structural/local stress values as determined by means of various methods. In particular the influence of (a) FEM software solver, (b) potentially software-depending element charac ...

2016

Laminated connections for structural glass applications under shear loading at different temperatures and strain rates

Alain Nussbaumer, Pieter Christian Louter, Manuel Santarsiero

Connections between structural glass components represent one of the main critical aspects of glass engineering. In the last years, a novel typology of adhesive connections has emerged, known as laminated adhesive connections. Two adhesive materials for la ...

Elsevier2016

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

Geometrical and material characterisation of quenched and self-tempered steel reinforcement bars

Eugen Brühwiler, Alain Nussbaumer, Marina Rocha Pinto Portela Nunes

Quenched and self-tempered (QST) steel reinforcement bars (rebars) are manufactured by Thermex or Tempcore processes. Characterization studies of QST rebars are mostly limited to reveal the hardened outer layer and some improved mechanical properties compa ...

Asce-Amer Soc Civil Engineers2016

The mechanical behaviour of SentryGlas® ionomer and TSSA silicon bulk materials at different temperatures and strain rates under uniaxial tensile stress state

Alain Nussbaumer, Pieter Christian Louter, Manuel Santarsiero

2016

Stress Analysis of Unbonded and Bonded Prestressed CFRP-strengthened Steel Plates

Alain Nussbaumer, Elyas Ghafoori, Ardalan Hosseini, Masoud Motavalli

Numerous research studies are available in the literature on strengthening of steel members using carbon fiber reinforced polymer (CFRP) composites. Although it is clear that strengthening using prestressed CFRP plates has several advantages over non-prest ...

The Hong Kong Polytechnic University2016

Calibration of partial safety factors for fatigue design of steel bridges

Alain Nussbaumer, Luca D'Angelo

The aim of this paper is to propose a new framework for assessment of fatigue partial safety factors with focus on steel bridges welded joints. Fatigue resistance S-N curves for constant amplitude (CA) and variable amplitude (VA) loadings are defined using ...

2015

New experimental determination of fatigue strength of tubular truss joints in steel grades up to S690

Alain Nussbaumer, Farshid Zamiri Akhlaghi

In this paper research work on welded butt weld connections between hot-rolled seamless tubes and steel castings are presented. Comparison is made between different weld preparations for the butt welds including different steel grades, repair methods, the ...

CRC press2015

Determination of minimum CFRP pre-stress levels for fatigue crack prevention in retrofitted metallic beams

Andrin Herwig, Alain Nussbaumer, Elyas Ghafoori, Gary Scott Prinz

The majority of fatigue strengthening studies focus on reducing propagation rates of existing cracks, ignoring the crack initiation stage. Many existing metallic bridge members however do not contain existing cracks, but rather are nearing their design fat ...

Elsevier2015

Page 3 sur 6