Case Study of ILM Bridge Considering Nose-Deck Interaction Behavior

변단면 압출추진코와의 상호작용을 고려한 ILM교량의 사례분석

The structural behavior of superstructure by ILM is strongly dependent on the process of launching nose according to the construction process. The ratios of length, weight, and flexural stiffness of launching nose to those of superstructure are taken as the analysis parameters in this study. The interaction behaviors are analyzed according to the variation of parameters. Design formulas to pursue the optimum values for length, weight, and stiffness of launching nose are suggested through the parametric study. As a result, the minimum stiffness ratio is analyzed as I₂/I=0.045 and I₁/I=0.02 for the optimum track of the sectional force while the elastics modulus ratio is 6.8359. Additionally, the design results of real projects are analyzed by the developed formulas to verify that they are designed well in structurally optimal point of view.