In Japan, as a large number of sewer lines approach and exceed their design service life, rehabilitation of these ageing sewers to ensure their safe operation and upgrade their functions gains urgence. In this pioneering work, Z. Shi, M. Nakano and Y. Takahashi present a systematic treatment of structural analysis and renovation design of ageing sewers as semi-composite pipes, including testing and construction guidelines. The concept of a semi-composite pipe and the application of fracture mechanics of concrete in numerical modelling are the two distinctive features of the established design...