PC 침목의 한계상태에 대한 고찰

When proportioning of section of sleeper, sleepers are designed with elastic design method and examined the load-carrying capacity by ultimate strength method. Generally, this method considers excessive safety factor because of the uncertainty of design and construction. And it becomes uneconomical design as a result. Therefore, the introduction of limit state design which is applying the probability concept and defining the failure conditions or degree of risk is needed for rational design. In this paper, limit states of prestressed concrete sleeper abroad are investigated as a basic research for development of limit state design of sleeper.