교량의 위험도 및 중요도를 고려한 관리수준 결정에 관한 연구
Determination of the Management Level Considering Risk and Criticality of Bridges
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초록
지속적으로 노후화 되고 있는 국내 교량 시설물의 합리적인 유지관리 의사결정과 안전 확보를 위하여 IoT 기반의 모니터링 시스템이 구축되고 있다. 다수의 전체 관리 교량 중 계측 대상의 선정을 위해서는 높은 관리수준이 요구되는 교량을 합리적으로 평가하여야 한다. 이를 위해 전체 교량을 대상으로 다양한 영향인자를 고려하여 위험도를 평가할 수 있는 방법 및 절차를 개발하고, 계측 대상교량의 상대적 우선순위를 판단하기 위하여 적용하였다. 전체 관리 대상교량 8천여개소를 대상으로 위험도 및 중요도 기반의 종합관리수준을 1~5등급으로 평가하여 높은 관리수준이 필요한 4, 5등급 교량 1,933개소를 선정하였다. 실제 교량 열화·손상 및 피해발생 사례와 종합관리수준의 통계분석을 통해, 선정된 교량은 타 교량에 비해 평균적으로 노후도와 교통량이 높고 안전등급이 낮게 나타났다. 전체 교량 중 상대적인 위험도와 중요도가 적정하게 고려되어 선정된 것으로 판단되며, 제안된 교량 위험도 평가 방법은 향후 시설물의 다양한 유지관리 의사결정 문제에 유용하게 활용될 수있을 것으로 기대된다.
Abstract
An Internet of Things (IoT)-based monitoring system is being constructed with the objective of facilitating rational maintenance decisions and ensuring the safety of domestic bridges that are experiencing continuous aging. In the context of a large number of total managed bridges, it is essential to undertake a rational evaluation of those that require a high level of management in order to select appropriate measurement targets. In order to achieve this objective, a methodology was devised to assess the risk level of the all bridges, taking into account a range of influencing factors, then employed to determine the relative priority of bridges requiring measurement. A total of more than 8,000 bridges were evaluated in comprehensive management levels (CML) 1 to 5 based on risk and criticality, and 1,933 bridges were selected as CML 4 and 5 bridges requiring higher management levels. A statistical analysis of actual bridge deterioration, damage, and damage cases, as well as CML, revealed that the selected bridges were older, more heavily trafficked, and had lower safety ratings on average than other bridges. It is believed that the relative risk and criticality of all bridges were appropriately considered and selected, and that the proposed bridge risk assessment method will prove useful for various maintenance decision-making problems of facilities in the future.
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