Membrane structure is a system that is stabilized by maintaining a tensile state of the membrane material that originally cannot resist the bending or pressure. Also, it is a system that allows the whole membrane structure to bear external loads caused by wind or precipitation such as snow, rain and etc. Tension relaxation phenomenon can transpire to the tension that is introduced to the fabric over time, due to the innate characteristics of the membrane material. Thus, it is important to accurately understand the size of the membrane tension after the completion of the structures, for maintenance and management purposes. The authors of this paper developed the new portable measurement equipment by using sound wave and measured the tension of pre-existing membrane structure for its maintenance by using the equipment. Through analyzing the measurement data, the authors propose the points that should be improved and the technical method for the new maintenance system of membrane tension.

The Ministry of Unification has published the North's social and economic indicators about 'North Main statistical indicators' every years. However, "North Main Statistical Indicators" does not reflect the status and the level of North Korean infrastructure. The purpose of this study is to survey maintenance status and level of North Korean infrastructure, and to propose a regional assessment results.

This study aims to establish complementary relationship among designer, builder, and maintenance manager by combining BIM(Building Information Modeling) technology with bridge safety diagnosis and maintenance to secure its effectiveness and systematization. To establish and maintain database by organizing quantities of data about existing case of safety diagnosis and maintenance, and develop the system to be used by practitioners.

The present study proposes the definition of service life and the end-of- life criterion for bridge maintenance. Bridges begin to deteriorate as soon as they are put into service. Effective bridge maintenance requires sound understanding of the deterioration mechanism as well as the expected service life. In order to determine the expected service life of a bridge for effective bridge maintenance, it is necessary to have a clear definition of service life and end-of-life. However, service life can be viewed from several perspectives based on literature review. The end of a bridge’s life can be also defined by more than one perspective or performance measure. This study presents definition of service life which can be used for bridge maintenance and the end-of life criterion using the performance measure such as a damage score. The regression model can predict an average service life of bridges using the proposed end-of-life criterion.

It is very difficult to predict the slope failure and to evaluate the slope stability, because the slope failure mechanism is complex and there is many influence factors. This paper was conducted to study slope stability analysis based on the measured data on the slope. The methods used in the study are the asymptotic, clustering characteristics, 3D spatial coordinates system. To analysis slope behavior, we studied the advantages, disadvantages and applicability of each method.

Frequent damages and safety incidences had occurred. Although Korea Expressway Coporation is well organized for various disaster and incidences on expressway based on its many experiences, it still have difficulties in demonstrating its superiority and capability in disaster management. Also when compared with disaster management framework of other organization in developed countries, level of the management still need the improvement.

This paper is presented in progressive improvement of the construction and maintenance for corrugated steel plate culverts in Korea expressway. After reviewing the technical consulting reports and field surveying this whole structures. It is effectively help to minimize damage and improve the stability of structures.

The maintenance costs will be increased due to the aging of the bridge. Thus, the maintenance strategy considering the damage characteristic of elements is needed for the efficient maintenance of the bridge. The objective of this research is to investigate the minimizing strategy of maintenance costs for highway bridges.

In this study, we use the general national road's bridge format information to carry out the efficient maintenance services. Especially maintenance method of the operating new-type girder bridges is treated by collecting the information of them

Ministry of Oceans and Fisheries has developed the port facility management system(POMS) that can be run systematically manage safety inspection and maintenance results about the mooring facilities, counter facilities and pier pavement in a national 60 port. This paper contains a description of the POMS.

A lot of bridges have been built with economic growth and national development for a long time. The existing domestic bridge has been become deterioration with the increase of the quantity management. Therefore appropriate maintenance such as an inspection, diagnosis, repair, and rehabilitation is required to extend the service life of the bridge. The domestic and international cases of the maintenance for inspection personnel were investigated and analyzed. As a result, there was hardly clear and accurate criteria about inspection personnel but Denmark. However, the qualification and competence of the team members have been presented.

Total 7 maintenance indices were proposed to manage bridges efficiently, which were categorized into bridge safety, longevity, and cost-effective management system. Goal and current state for each index were also presented. Optimum strategies for each index are required in order to achieve goals.

Defects of diversion tunnel have been analyzed by using the precise inspection for safety and diagnosis in 7 dams. Leakage from joint, crack, and material segregation is crucial damage in dam as well as crack, corrosion, and drainage system. Maintenances of diversion tunnel have been suggested with common and unique characteristics of defects.

The results of considerations on the current state of PSC Box girder safety maintenance with external tendons, it appears the extra suggestion of safety maintenance and popularization of technique is needed.

구조물의 수명관리는 일반적으로 불확실성의 효율적 고려를 위해 신뢰성 이론을 적용한다. 전체 구조시스템의 신뢰성 평가는 구조 요소의 신뢰성 평가와 구조시스템의 모델링을 통해 이루어진다. 구조시스템은 신뢰도에 대한 구조요소의 역할과 기여도를 고려하여 모델링 된 다. 따라서, 구조시스템의 신뢰도는 구조요소의 모델링과 구조요소의 상관관계에 따라 서로 다른 결과를 제시하게 된다. 최초 구조시스템의 신 뢰도 평가와 열화요소를 반영한 구조시스템의 수명 평가를 바탕으로 생애주기 비용 최소화와 관련된 목적함수를 가지는 최적화 과정을 통해 수 명관리가 이루어진다. 본 논문에서는 구조시스템을 구성하는 구조요소의 상관관계와 더불어 기존의 연구에서 고려된 바 없는 유지보수 간의 상 관관계에 따른 수명평가 영향분석을 수행하며, 이를 통해 향후 좀 더 효율적인 수명관리 기법 개발에 활용하고자 한다. 또한, 예방유지보수와 필 수유지보수를 모두 고려하며, 유지보수간 독립 상태와 완전상관 상태에 따른 수명 예측 및 최적화 유지보수 계획 수립을 비교 제시한다.

본 연구에서는 비용예측모델과 성능예측모델을 이용하여 네트워크 레벨에서 향후 교량과 터널 유지관리 비용과 성능을 예측할 수 있는 방법론은 개발하였다. 현재 국내의 시설물 유지관리 관련 연구는 대부분 단일 시설물에 집중되어 있어 도로망차원의 네트워크 레벨 분석 에는 적용하기 어렵다. 따라서 시설물군 단위로 유지관리 계획을 수립해야하는 실무주체에게 유의한 정보를 제공하지 못하고 있는 실정이다. 본 연구의 예측모델은 시설물의 성능에 현재 시특법에 의해 평가하고 있는 상태외 사용성과 기능성을 포함하였으며, 기본 분석과 확장 분석을 통해 각 시설물의 조치 시기와 연간 예산을 추정할 수 있다. 또한 사례 분석을 통해 기술적 타당성을 검증하였다. 본 연구의 방법론이 활성화된 다면 다수의 시설물의 비용대비 미래 성능을 파악할 수 있으며, 효과적인 중장기 예산 수립을 할 수 있을 것으로 판단된다.