Inelastic local buckling of tubes for combined walls and pipelines

In this study, the bending behaviour of tubular members is investigated. The thesis consists of four parts:<br/>Part I: Literature study of the bending behaviour of tubular members<br/>Part II: Spiral-welded tubes for application in combined walls<br/>Part III: Deformation of buried pipelines crossing active strike-slip faults<br/>Part IV:...

Design and results of fault movement tests on buried pipelines (RFCS GIPIPE)

Measurements of imperfections in spiral-welded tubes

Four point bending tests on spiral welded tubes

Experimental and numerical investigation of the bending capacity of spiral-welded steel tubes

To investigate the structural behaviour of large-diameter spiral-welded steel tubes under bending, a full scale experimental program has been performed, consisting of thirteen 42-inch diameter, spiral-welded steel tubes with D/t ratios ranging between 65 and 120. Additionally, numerical studies have been conducted, using nonlinear finite element...

Strain-based design procedures for spiral-welded steel tubes in combined walls

To investigate the structural behaviour of large-diameter spiral-welded steel tubes under bending, a full scale experimental program has been performed, consisting of thirteen 42-inch diameter, spiral-welded steel tubes with D/t ratios ranging between 65 and 120. Additionally, numerical studies have been conducted, using nonlinear finite element...

TIG-dressing of High Strength Butt Welded Connection. Part 2: Physical Testing and Modelling

Weld improvement techniques are aimed at reducing the notch effects of welds and generally focus on two aspects: a change of geometry of the weld toe and a change of the weld residual stresses. In this paper, fatigue tests are discussed, performed on butt welded specimens in steel grades ranging from S460 to S1100 in the TIG-dressed condition....

TIG-dressing of High Strength Steel Butt Welded Connections. Part 1: Weld Toe Geometry and Local Hardness

This paper presents the results of extensive measurements on weld toe geometry of as-welded and TIG-dressed butt welded connections in high strength steels S460, S690 and very high strength steels S890 and S1100. Descriptions of the measurement techniques and data analysis are presented. Four weld toe parameters have been formulated to...

Stability of spiral welded tubes in Quay Walls

A European research project (RFCS) has started to provide economic and safe guidance for the design of spirally welded tubes in combined walls. The main motivation for this project called COMBITUBE is that the current Eurocode 3 regulations for tubes in quay walls lead to uneconomic designs, because of poor local buckling design rules for these...