2020 Volume 76 Issue 2 Pages I_67-I_74
Taking the case of an existing shield tunnel for power transmission where the deformation of the tunnel was caused by the unexpected load fluctuation, the comparison of the load bearing performance by the allowable stress design method and the limit state design method was conducted. As a result of the existing structure, the allowable stress design method satisfied the load bearing performance, but the limit state design method could not satisfy the load bearing performance and required an increase in the amount of reinforcing bars. Since the tunnel under consideration required large-scale reinforcement, it was shown that the design by the limit state design method is an effective design method against unexpected fluctuations.
