... ABSTRACT Ultra-high performance concrete (UHPC) has attracted significant interest due to its superior mechanical properties and durability compared to conventional concrete. When confined within steel tubes, forming UHPC-filled steel tube (UHPCFST) columns, these materials demonstrate...

... in comparisons with test results. INTRODUCTION Steel tubes are used for pipelines and also for structural applications. They may be seamless or longitudinally or spirally welded. An important application of spirally welded steel tubes is in combined wall systems for quay walls as indicated in Fig. 1...

... ABSTRACT The steel tube of concrete-filled steel tubular (CFST) structures is under multi-axial stress state due to its composite action between steel and concrete, and may further affect its fatigue performance adversely. In this paper, a numerical analysis method based on the extended finite...

... ABSTRACT This study investigated the application of concrete-filled steel tubes (CFSTs) in wharf piles. The deformation and mechanical characteristics of CFST piles under lateral loading were investigated through the finite element method. Furthermore, the mechanism of the steel tube effect...

..., on subsea cables and umbilicals, with use of a new sensor based on Fibre Bragg Grating (FBG) technology. To evaluate the accuracy of the new measurement method, a super duplex steel tube with known bending stiffness is used as a reference test sample. Results of the bending stiffness, based on measured...

... Abstract Concrete-filled steel tubular (CFST) members are widely used in the field of marine engineering. The members may be subjected to a combination of various complex external forces. The study on the mechanical properties of the steel tube-core concrete interface is beneficial...

... skin effect current midstream oil & gas skin effect steel tube engineering temperature drop shutdown china double-layer insulation pipeline effect current sect system upstream oil & gas inner pipe pipeline apparatus sect cable subsea pipeline transportation Experimental...

... ABSTRACT This paper presents Nexans Norway's approach for validating the company's equipment for testing cables' and umbilicals' axial stiffness. The accuracy and precision are estimated from a full-scale tension test using a super duplex steel tube with known mechanical properties. Axial...

... ABSTRACT Umbilicals supply subsea oil and gas wells, subsea manifolds and any subsea system requiring remote control with energy (electric and hydraulic) and chemicals. An umbilical typically consists of steel tubes, signal cables, fiber optic elements and an outer protective sheath. More...

... its temperature sensitivity. The verification of the rig was performed by comparing calculated bending stiffness values based on test data compared to a known bending stiffness value of an accurately produced super duplex steel tube. INTRODUCTION As the offshore industry is operating in ever deeper...

... be investigated in the following proceeding. The evaluation of bending and axial load interaction is based on eccentric compression tests. uhpc-steel hybrid tube component test series htb support structure hybrid tube structure eccentricity series hta series htb evolution steel tube geometrical...

... was carried out for a dynamic steel tube umbilical under combination of tensile and bending loads. The purpose of the test was to investigate the behavior of the dynamic bending under complex loading conditions by examining curvature and stress of the steel tubes, either center tube or helical tubes. The full...

... compliant section behavior steel tube installation contractor infield umbilical upstream oil & gas stiffness uth sea floor mqc plate armor pot offshore uth frame end landing subsea system installation controls and umbilicals Installation of Infield Umbilical with Compliant UTH Yinglian...

... take? A local 3-D finite element model of a control umbilical was established for a recent project to study the risk of local buckling in the outer layer steel tubes and their interaction with the outer sheath for combined bending and compressive loads. The objective was to evaluate the umbilical...

... Abstract Predicting fatigue life of steel tube umbilicals is challenging especially in deep and ultra-deep water regions such as West Africa and Gulf of Mexico. This is due to high top tensions and bending moments that increase the internal friction impact on the umbilical fatigue performance...

... ABSTRACT: For the purpose of investigating concrete filled GFRP (Glass Fiber Reinforced Polymer)-steel tube structure under combined seismic loading, 4 specimens of the same size with 1 or 2 GFRP layers orientated in different directions are studied experimentally by a quasistatic test system...

... the mechanical behavior of a high-strength thin-walled cylinder steel tube under axial impact. The energy absorbing efficiencies of this material and traditional steel are compared. Energy absorbing capacity can generally be measured as the mass-specific energy absorption in the effective destruction length...

... This paper describes the application of FEA techniques to assess the structural performance of a subsea umbilical system. A 3-D FEA (finite element analysis) model of a steel tube umbilical was constructed and validated against full scale test data for tensile, bending and crushing loads cases...

... ABSTRACT A experimental study on a new structure system - Concrete Filled CFRP-Steel Tube is developed in this paper. 15 specimens are tested under compressive loadings. The results show a remarkable enhance in both the yield stress of steel tubes and the compressive strength of the concrete...

... was then calibrated against the experimental results. Satisfactory agreement was achieved between the recorded (test results) and computed (numerical analysis) load-slip responses, ultimate pull-out strength and longitudinal and hoop strain distributions along the steel tube. INTRODUCTION Many offshore platforms...