교량의 위험성을 고려한 성능기반 자산가치 평가방법에 관한 연구
A Study on the Performance-Based Bridge Asset Valuation Methods Considering Hazard
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초록
사회기반시설의 자산가치 평가는 일반적으로 정액법을 기반으로 상각후대체원가를 적용하고 있으나 시설물의 실제 가치를 정확히 반영하지 못하는 한계가 있다. 이에 교량의 성능을 합리적으로 고려하여 자산가치를 평가할 수 있는 성능기반 감가상각(PBD) 방법이 제안되었으나 개별 교량들의 환경 특성을 고려하지 못하였다. 본 연구에서는 기존 연구에서 제안된 PBD 방법에 개별 교량의 위험성을 고려할 수있는 위험성-성능기반 감가상각(HPBD) 방법을 제안하고 적용성 검토를 위하여 8천여 교량을 대상으로 평가를 수행하였다. 교량의 열화 위험요인을 선정하고 개별 교량들의 위험성을 평가하여 위험성 수준에 따른 가중치를 기존 PBD 방법에 적용하였다. 평가결과 PBD 방법과 유사한현재가치와 상대적으로 높은 미래가치가 도출되었으며, 개별 교량의 위험 특성을 고려한 HPBD 방법이 보다 합리적인 가치평가와 의사결정에활용 될 수 있을 것으로 판단된다.
Abstract
The valuation of infrastructure assets is typically conducted using the straight-line method, which employs the depreciated replacement cost as a basis. However, this approach has the limitation of failing to accurately reflect the actual value of the facility. In light of these considerations, the performance-based depreciation (PBD) method has been proposed as a means of evaluating the asset value of bridges on the basis of their performance, although it is not designed to take account of the environmental characteristics of individual bridges. This study proposes a hazard-performance based depreciation (HPBD) method that considers the risk level of individual bridges in the PBD method proposed in previous studies. The applicability of the proposed method was evaluated on more than 8,000 bridges. The risk factors for deterioration of bridges were selected, the hazard level of individual bridges was evaluated, and weights based on the hazard level were applied to the PBD method. The evaluation resulted in a present value comparable to that of the PBD method and a relatively high future value. It is postulated that the HPBD method, which considers the risk characteristics of individual bridges, can be used for a more reasonable evaluation and decision-making process.
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