Encontrados 13 documentos, a visualizar página 1 de 2

Stabilité des éléments et cadres en construction métallique : programme du cour...

Relatório de Unidade Curricular, apresentado para Provas de Agregação em Engenharia Civil, especialidade de Mecânica das Estruturas e dos Materiais, da Faculdade de Ciências e Tecnologia da Universidade de Coimbra

Course on fatigue and fracture mechanics : influence of residual stresses and p...

Sumário da Lição, apresentada para Provas de Agregação em Engenharia Civil, especialidade de Mecânica das Estruturas e dos Materiais, da Faculdade de Ciências e Tecnologia da Universidade de Coimbra

Probabilistic fatigue analysis of shop and field treated tubular truss bridges

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 probabilistic, fracture mechanics-based model. Systems reliability theory is then used to determine the reliability of the entire untreated or treated bridge. The re...

Size effect of welded thin-walled tubular joints

This paper clarifies the terminologies used to describe the size effect on fatigue behavior of welded joints. It summarizes the existing research on size effect in the perspective of newly defined terminologies. It identifies knowledge gaps in designing tubular joints using the hot spot stress method, i.e. thin-walled tubular joints with wall thickness less than 4 mm and thick-walled tubular joints with wall th...

Ein Stethoskop zum Überprüfen von Brücken

http://dx.doi.org/10.1002/stab.200790054

A probabilistic model for determining the effect of post-weld treatment on the ...

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 of single untreated and treated crack sites in tubular K-joints. A systems reliability approach is then proposed for the analysis of tubular structures with ...

Experimental study on the fatigue behaviour of welded tubular K-joints for bridges

Fatigue tests were carried out on welded circular hollow section K-joints typical to bridges. The tests specimens were large-scale (approximately 9 m long and 2 m high) trusses loaded in the plane of the truss. Measured member stresses showed that a significant proportion of the load in a truss member may be due to bending, underlining the importance of considering correctly this load case in the design of thes...

Les possibilités offertes par les ponts mixtes tubulaires

Improving the fatigue resistance

Toughness requirements in structural applications