Research on contact stress in Curving Hole of prestressed concrete structure

摘要

Insufficient effective prestress in prestressed concrete bridges causes structures premature invalidation. Based on Hertz Contact Theory and Finite Element Method, this paper points out the irrationality of the effective prestress formula in Curving Hole at present, and then explores the distribution law of contact stress in Curving Hole. Several contact stress distributions in Curving Hole are hypothesized and the prestress loss caused by friction was compared with each other. The analysis in this paper is very important for further study of factors affecting effective prestress in Curving Hole, and it plays a remarkable role on the design of long span prestressed concrete bridge.