Design, validation and implementation of structural fibre composite elements in potable water storage

Abstract

To offset the problem of material degradation, Wagners Composite Fibre Technology were engaged to develop a light weight, long lasting, corrosion resistant solution utilizing Glass Fibre Reinforced Polymer (GFRP or FRP) which has a design life of 100 years. This paper describes the design, validation testing, and implementation of the Wagners fibre composite tank columns for use as part of the SA Water refurbishment program. The average water tank generally consists of 20 reinforced concrete columns supporting the roof structure of 300x300mm square profile and are approximately 8.5m high. The columns that have been designed and manufactured by Wagners utilize the pultrusion process with ECR type glass reinforcement and a vinyl ester resin matrix which has been tested and complies with the Australian Standard; AS/NZS 4020, for use in potable water. The fibre composite column design described above represents a new approach in water tank materials which eliminates the risk of premature failure of structural members due to long term corrosion. The inherently low weight and high strength of the material lends itself to quick and easy installation to ensure water tanks are refurbished and back in service as quickly as possible with minimal cost implications. In conjunction with the low maintenance requirements for fibre composite, the structural components designed by Wagners for use in water storage tanks offer a low whole of life cost throughout their 100-year design life.