Limit‐States Design of Prestressed Concrete Pipe. II: Procedure

A rational method for the design of prestressed concrete cylinder pipe subjected to the combined effects of external load and internal pressure is presented. This method is based on certain limit‐states criteria on serviceability, elastic limits, and strengths of the constituent materials. The design criteria and the rationale for their selection is presented in the first paper of this series. In this paper, the procedures developed for the computation of the combined loads corresponding to each design limit state are presented. The procedures include the computation of moment capacities for the thrusts resulting from prestressing and combined loads, including internal pressure, external load, and pipe and fluid weights, and a simplified method to account for moment redistribution from the invert and the crown of the pipe to the springline as the core and the coating undergo strain softening and cracking.