Rehabilitation piping applications

The probabilistic analysis presented in this chapter is not restricted to a specific fabrication approach but rather presents results as a function of the fiber volume fraction and can be applied to a wide range of pipe rehabilitation methods. The time-dependent failure probability analysis is illustrated for specific fiber volume fractions and can be repeated for any fiber volume fraction depending on the manufacturing process of interest. Typical fiber volume fractions of 30% and 40% are selected conservatively for example probability analysis conducted in the chapter. Recent efforts to measure fiber volume fractions used in composite pipe applications report fiber volume fraction values ranging from 47.6% to 54% for filament-wound composite pipes (Abdalla et al., 2008), and Chin and Lee (2005) measured volume fractions of 47% for unidirectional laminates manufactured via resin transfer molding in a trenchless rehabilitation scheme. 

Yu HN, Kim SS, Hwang lU, Lee IXl. Application of natural fiber reinforced composites to trenchless rehabilitation of underground pipes. Composite Structures. 2008 86(1-3) 285-290. DOI I0.I016/j.compstruct.2008.03.015. 

For this example application, the objective is to evaluate the long-term performance of FRP rehabilitation on a fully deteriorated, pressurized pipe in terms of likelihood of failure. In particular, the effects of manufacturing quality on failure probability of the as-built and service life are considered, including... 

Finite element analysis (FEA) of fiber-reinforced polymer (FRP) rehabilitation of cracked steel and application to pipe repair... 

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