Structural Health Monitoring of Steel Strip Reinforced Thermoplastic Pipe Under Internal Pressure

Abstract

This study aims to support structural health monitoring (SHM) of offshore pipelines by characterizing the strain-pressure behavior of steel strip reinforced thermoplastic pipe (SSRTP). An innovative split-ring test method and validated finite element model (FEM) are used to analyze the progressive strain development under internal pressure. The study further explores the influence of interlayer friction and winding angle on the strain response, providing essential insights for accurate SHM interpretation and damage prediction of offshore pipelines. It is found that the friction between layers effectively reduces the hoop strain on the external surface. A large winding angle results in smaller hoop stains.