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Design Service Life Determination for Bridge Structural Elements

Yuqian Wang, Xin Ruan, Airong Chen, Haijun Wu, Tobia Zordan

Abstract

Through definition of design service lives for bridges and their elements, element classification according to structural systems, durability type research as well as investigations of their actual operating lives and recommended design service lives in specifications home and abroad, a direct method and also a simplified one were proposed in order to determine design service lives of bridge structural elements based on life-cycle cost analysis. In direct method, element service life schemes were established, and then the one with optimal economy could be selected through life cycle cost calculation of each scheme. In the simplified method a calculation formula was presented, for applying which the classification and evaluation of the influence coefficients were discussed and recommended foundational design service lives of bridge elements were brought forward based on professional investigations. In the end, a certain sea-crossing project was used as an example to illustrate the process of design service life determination for bridge structural elements.

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Key concepts: Bridge (graph theory), Service (business), Service life, Computer science, Durability, Process (computing), Element (criminal law), Order (exchange)