Date of Award
5-2022
Degree Type
Dissertation
Degree Name
Ph.D.
Degree Program
Engineering and Applied Science - Mechanical
Department
Mechanical Engineering
Major Professor
David Hui
Abstract
Many offshore single-wall pipelines and structural failures have occurred in the past. As a result, lives were lost, and billions of dollars were spent. In addition, natural disasters such as earthquake fault zones can cause a large volume of soil movement. This can easily damage single-wall pipelines or piles of fixed offshore platforms in the earthquake fault zone.
Currently, the single-wall pipelines are used for the offshore and onshore oil and gas industry. This research investigated the use of double-wall composite pipe steel-polymer-steel (SPS) in place of single-wall pipe to prevent such failures. The double-wall composite pipe has a larger displacement capacity, higher load capacity, the ability to take higher pressure, more heat resistance, and more ductility than the single-wall pipe. Hence, this research studied improvement using double-wall composite pipes and the test results were compared against the single-wall pipes. At the first step of the research, portal steel tubular beams verifications and validations were performed. Then, the laterally loaded steel pipe in clay verification exercises were conducted. Thereafter, the single-wall and double-wall composite pipes were analyzed in clay and the results were compared. Strain, von Mises stresses, and ovality of the pipes were observed and compared against the industry standard. Four-point beam bending tests were also performed for the single and double-wall composite pipes. Boned and unboned behavior of steel and polymer were studied for the composite pipe. The stiffnesses of the clay were changed and the behavior of the steel pipe was investigated. The stiffnesses of the polymer were varied and the behavior of the composite pipes was observed. The annulus size of composite pipes was also varied, and the analysis results were documented. Weld was introduced in the pipe connection and the welding effect was observed. This research work finds significant improvement in the SPS double-wall composite pipe.
Recommended Citation
Thang, Vul, "Strain-based Design of Steel-Polymer-Steel Composite Pipes" (2022). University of New Orleans Theses and Dissertations. 2999.
https://scholarworks.uno.edu/td/2999
Included in
Computational Engineering Commons, Computer-Aided Engineering and Design Commons, Geological Engineering Commons, Other Mechanical Engineering Commons, Structural Engineering Commons
Rights
The University of New Orleans and its agents retain the non-exclusive license to archive and make accessible this dissertation or thesis in whole or in part in all forms of media, now or hereafter known. The author retains all other ownership rights to the copyright of the thesis or dissertation.