A5082236645- Geotechnical Engineering and Underground Structures
- Structural Integrity and Reliability Analysis
- Structural Load-Bearing Analysis
- Geophysical Methods and Applications
- Mechanical stress and fatigue analysis
- Composite Structure Analysis and Optimization
- Material Properties and Failure Mechanisms
- Drilling and Well Engineering
- Non-Destructive Testing Techniques
- Metal Forming Simulation Techniques
- Engineering Diagnostics and Reliability
- Landslides and related hazards
- Structural Engineering and Vibration Analysis
- Fatigue and fracture mechanics
- Microstructure and Mechanical Properties of Steels
- Structural Response to Dynamic Loads
Stantec (Canada)
2020-2024
University of Alberta
2017-2021
The rapid development of offshore oil and gas resources in recent years has led to a steadily growing importance the safety pipelines. Active faults are some main geological hazards which onshore pipelines may be subjected. In this study, an improved analytical method for estimating strains subjected strike-slip fault displacement was proposed. pipe steel considered as linear strain hardening material soil constraint on series elastic–plastic nonlinear springs. Explicit solutions elongation...
The structural integrity of underground pipelines are subject to a major threat from permanent ground displacements when they cross active tectonic (e.g., strike-slip) faults, because large strains potentially induced in pipes, leading pipe buckling and possible rupture. In this paper, the behavior X80 is studied numerically with an emphasis on effects steel stress–strain characteristics. A rigorous mechanics-based nonlinear finite element (FE) model buried crossing strike-slip fault...
Steel pipelines are subjected to a variety of complex, and sometimes difficult predict, loading schemes during the fabrication, installation operation phases their lifecycles. Consequently, mechanical behavior steel is not only influenced by grade but also history pipe segments. Due resultant intricacies nonlinear load-deformation pipelines, adequate numerical analysis techniques usually required for simulation under different schemes. The validity such simulations largely accuracy true...
Pipelines typically exhibit significant inelastic deformation under various loading conditions, making it imperative for limit state design to include considerations the deformational capacity of pipelines. The methods employed achieve higher strength API X80 line pipe steels during plate manufacturing process tend increase hardness material, albeit at cost ductility and strain hardenability. This study features a simple robust material stress-strain characterization model, which is able...
Abstract As conduits of energy, pipelines convey products from a point origin to end-users. On the way, each pipeline inevitably traverses natural geographical landforms, including slopes and waterways, which can impart stresses pipe. Over time, weather-related outside forces alter landscape may be subject interacting effects ground movement, in terms imparted high axial/longitudinal that not have been accounted for design. Evaluation these identify when operating safety margin pipe is...
Abstract Pipelines traversing landslides can be subjected to forces due ground displacement. Stress-relief projects are usually planned before strain in the pipe, or a girth weld reaches one of capacities associated with limit state event using certain safety margin. Accurate estimation pipe growth slide movement is key input for planning stress-relief projects. Through presenting case study, this paper introduces concept an advanced assessment approach. This method uses finite element...
This paper presents the basic concept and verification tests results of a novel method designed to prevent failures buried pipelines subjected compressive deformations which are usually caused by ground movements. In this boundary conditions pipes modified installing soft elements next pipe before backfilling. With new conditions, response under large forces will be in form stable global buckling mode with predefined deformed shape. behavior prevents rapid increase axial force that causes...
Abstract In strain-based design and assessment, accurate measurement of pipe longitudinal strain demand is a key element in performing proper assessments. Quick pipeline assessments are usually needed after widespread natural disasters such as earthquakes or heavy rainfalls that affect multiple lines at several sites. Finite Element Analyses (FEA) In-line Inspection (ILI) tools the most common methods to measure/estimate in-service pipelines. However, because they rather time-consuming...