교량 첨가시설물을 고려한 사장교의 내풍 안정성 평가

초록

Purpose: This study investigates the aerodynamic stability of a cable-stayed bridge following the installation of a power distribution conduit and a mobile inspection car rail. The evaluation was performed by comparatively analyzing computational fluid dynamics (CFD) results from the original two-dimensional bridge cross-section model and a modified model incorporating these new facilities. Method: The fluid flow was modeled as an unsteady, incompressible flow, governed by the Navier-Stokes equations. Result: The CFD analysis of the modified cross-section yielded a drag coefficient of 1.48. This value represents an approximate 2.8% increase compared to the drag coefficient derived from the CFD analysis of the original cross-section without the additional installations. Conclusion: The calculated drag coefficient of 1.48 remains below the original design value of 1.52, which was used for the initial wind load computations. Consequently, the results confirm that the additional facilities do not necessitate an increase in the originally established wind load.

키워드