• Title/Summary/Keyword: deterioration evaluation

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Deterioration Evaluation of Railway Line Segments for Budget Distribution (예산배분을 위한 철도선로구간의 노후도 평가)

  • Kim, Seong-Ho;Choi, Chan-Yong;Na, Hee-Seung
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.1802-1809
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    • 2011
  • A distribution method of limited budget for rail line facility improvement is to use investment priorities of rail line segments based on their deterioration. In this paper we present an evaluation method of rail line segment deterioration which can be used to distribute limited budget. Rail line facilities include rail track, crossing, road bed, bridge, tunnel. These facilities deterioration and line shape can affect line segment deterioration. Deterioration evaluation method we present is a weighted sum of each component deterioration scores. The component weight can be obtained from experts using analytic hierarchy process.

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A Study on Adequacy of Pipe Deterioration Evaluation Methods using the Endoscope of Water Distribution Pipe (배수관 내시경 조사를 통한 간접적인 관 노후도 평가방법의 적정성 연구)

  • Choi, Tae Ho;Kang, Sin Jae;Choi, Jae Ho;Koo, Ja Yong
    • Journal of Korean Society of Water and Wastewater
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    • v.26 no.5
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    • pp.669-683
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    • 2012
  • The water supply pipes are buried across wide range of areas, so it is hard to spot them using excavation and takes a large amount of expense. Thus, there is a high risk for direct research and application, accompanying many difficulties in implementation of them. Therefore, it is more economical and convenient to use indirect evaluation variables than direct evaluation of the buried pipes in assessing the degree of pipe deterioration. To assess the degree of pipe deterioration using the indirect evaluation variables, it should be done first to identify how and to what extent they affect the degree of deterioration. This study measured the evaluation variables for pipe deterioration using the pipe endoscope and analyzed the measurement results and the degree of impact on the pipes. In addition, this study attempted to evaluate the adequateness of the pipe deterioration evaluation using the indirect variables based on the analysis results. The evaluation variables measured through the pipe endoscope were the thickness of sediments, size of scale, degree of desquamation and condition of connections. For the indirect evaluation variables, the data such as the property data from GIS pipe network map as well as the material, diameter, age and pipe lining material of the pipe, road type, leakage frequency, average water velocity and water pressure using the leakage repair records was collected. Using the collected data, this study comparatively analyzed the indirect evaluation variables for the degree of pipe deterioration and the results from the pipe endoscope to choose appropriate variables for pipe deterioration evaluation and calculated the weights of the indirect variables on the degree of deterioration. The results showed that the order of the impact of indirect variables on deterioration was pipe age > pipe lining material > road type > leakage frequency > average water velocity with their weights of 0.45, 0.20, 0.15, 0.10, and 0.10, respectively. Conclusively, the results suggest that the measures of sediment thickness, scale size, degree of desquamation and condition of connections are appropriate for the evaluation of pipe deterioration and sufficient for the analysis of the impact of the indirect variables on deterioration.

Development of the Evaluation Techniques of the Deterioration for the Rural House (농촌주택 개량을 위한 노후화 진단 방안)

  • 정남수;이정재;김한중;윤성수;박미정
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.43 no.1
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    • pp.106-115
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    • 2001
  • This study attempted to make evaluation model of deterioration for the rural house. defined the deterioration of rural house as the two categories. First is the physical deterioration which is affected by physical faults and the second is the social deterioration which is affected by change of environments. As a results, physical deterioration model was developed by types of rural house, and social deterioration model was considered to reverse function of satisfaction of a resident.

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A Study on the Evaluating Indicators of the Level of Deterioration in High-rise and high-density Apartments (고층고밀 아파트단지의 노후도 평가지표 개발)

  • Cho, Sung-Heui;Lee, Tae-Kyung
    • Journal of the Korean housing association
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    • v.20 no.4
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    • pp.131-142
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    • 2009
  • High-rise and high-density apartment complexes have been built and supplied on a large scale in the 1st period of the New Town project in metropolitan areas since the late 1980s. Now It has become necessary to improve those apartment complexes, which have serious deterioration problems for aging more than about 20 years accompanying simultaneity and a large scale. The purpose of this research is to develop the evaluating indicators to measure the level of deterioration of apartments inclusively and practically in order to regenerate apartments as sustainable residential environments. This study is composed of the following four parts; (a) establishing the conceptual model of evaluation of apartment deterioration, (b) selecting evaluation items, (c) constituting evaluation measurement, and(d)weighting evaluation indicators. First, deterioration of apartments was conceptualized by physical. social, and economical aspects in terms of sustainable development and proposed the conceptual model of hierarchy structure of evaluation of apartment deterioration by literature reviews. Second, evaluating items were selected based on literature reviews of existing indicators and preceding studies about apartments of Korea and foreign countries. The evaluating indicators were identified as a total of 77 evaluating items which were composed of three dimensions and 9 attributes on the basis of the conceptual model. They cover comprehensive scope of the apartment such as unit, building, complex, and site. Third, as the measurement, the 5 point ordinal scale measure was suggested. The evaluating measurement including measure standards, measure methods, and measure contents were developed by each evaluating items. Lastly, the weighting of evaluating indicators was analyzed by AHP method conducted by survey on the expert group. Items were identified as high contributors or low contributors. The weighting of these items could suggest several evaluations according to the situation. The evaluation of the level of deterioration can be done by both total evaluation and a specific field of evaluation. In addition, it is easy to grasp deteriorated attributes or dimensions by providing a radar and bar chart showing evaluation results. These evaluating indicators could be a useful tool to grasp actual methods for the regeneration of apartments.

Making Method of Deterioration Map and Evaluation Techniques of Surface and Three-dimensional Deterioration Rate for Stone Cultural Heritage (석조문화유산의 손상지도 제작방법과 표면 및 3차원 손상율 평가기법)

  • Jo, Young-Hoon;Lee, Chan-Hee
    • Journal of Conservation Science
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    • v.27 no.3
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    • pp.251-260
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    • 2011
  • This study focus on the suggestion of standard legend, the process system on making method of deterioration map, the development of crack index (CI), and the evaluation techniques of surface and 3D deterioration rate for stone cultural heritage. The standard legends of deterioration forms were made using a common graphic program after crack, blistering, scaling, break-out, granular disintegration, and perforation were subdivided. The deterioration map improved accuracy and reliability on deterioration range using 3D digital restoration and high resolution photograph mapping technique. Also, quantitative deterioration evaluation of stone cultural heritage was carried out developing the crack index, and the 3D deterioration rate of a break-out part was calculated by virtual restoration modeling. As a quantitative deterioration evaluation of Magoksa Temple stone pagoda based on the results described above, the north face showed high deterioration rate of bursting crack (1.70), hair crack (1.34), scaling (20.2%) and break out (13.0%), and the 3D deterioration rate of first roof stone was 6.7%.

Evaluation Method of Deterioration Grade for Remodeling Old Educational Facilities(II) - Synthetic Judgment Method of Deterioration Grade of Structural Components - (교육시설(敎育施設)의 리모델링을 위한 구성재료(構成材料)의 노후화(老朽化) 판정기준(判定基準) 작성(作成)(II) - 주요(主要) 구성부재(構造部材)의 노후도(老朽度) 종합판정방법(綜合判定方法) 제시(提示) -)

  • Seo, Chee-Ho;Choi, Min-Kwon;Choi, Soo-Kyung;Oh, Se-Chul
    • Journal of the Korean Institute of Educational Facilities
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    • v.10 no.5
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    • pp.15-22
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    • 2003
  • Deterioration of the educational facilities built before 1985 is a serious situation. The purpose of this study is to present the efficient remodeling method of old educational facilities. This paper, part II, presents the systemic and synthetic judgment method of deterioration grade of structural components. Deterioration grade of the whole structural components are judged by synthetic evaluation score which is the total of the score of ten evaluation items. And we added the importance coefficient of the viewpoint of four performance to each evaluation item.

Evaluation of Deterioration on Steel Bridges Based on Bridge Condition Ratings

  • Park, Chan-Hee
    • Corrosion Science and Technology
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    • v.3 no.4
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    • pp.166-171
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    • 2004
  • Recent developments in Bridge Management Systems (BMS) and in Life-Cycle Cost (LCC) of bridges, have raised the need for evaluation procedure of future condition (Deterioration) of a bridge. Predicting future deterioration is not an easy task due to limited past data to extrapolate from and also due to difficulty in measuring actual deterioration such as section loss of steel on an actual steel bridge. Also, increase in live load and reduction of resistance are random variables, thus a probabilistic approach should be adopted for determining the future deterioration. Due to difficulties in evaluation of future deterioration on steel bridges, accepting uncertainties within a reasonable error, a deterministic procedure using bridge condition rating can be a useful tool for projection of future condition of bridges to identify repair and maintenance needs. The object of this paper is to determine applicability of evaluating deterioration of steel bridge components based on Bridge condition ratings. Bridge condition ratings of bridge components show wide variation for bridges of same age and does not directly correlate well with the age of the bridge and/or deterioration of the bridge. High uncertainty can be reduced by breaking down the rating and by sensitivity analysis. From refined condition rating data, generalized deterioration profile of structures based on age can be derived. Examples are shown for sample bridges in USA. Approximately, 3,000 short to medium span steel bridges were listed in the inventory database. Results show wide variation of rating factors but by subdividing the Bridge condition ratings for various categories general deterioration profiles of steel bridges can be determined.

Deterioration Evaluation of Railway Line Segments Using Analytic Hierarchy Process (AHP를 활용한 철도선로구간 노후도 평가)

  • Kim, Seong-Ho
    • Journal of the Korean Society for Railway
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    • v.14 no.6
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    • pp.569-574
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    • 2011
  • An effective approach to distributing budget to railway line facility improvement is to use investment priorities of railway line segments based on their deterioration. In this paper we present an evaluation method of railway line segment deterioration which can be used to distribute limited budget. Railway line facilities include rail track, railroad switch, subgrade, bridge, tunnel. These facilities and line shape can affect line segment deterioration. Deterioration evaluation method we present is a weighted sum of each component deterioration scores. The component weight can be obtained from experts using analytic hierarchy process.

A Study on the Analysis and Evaluation of Deterioration Factors for the Structure of Reinforced Concrete Apartment According to Actual Condition Survey (철근콘크리트조 아파트구조물의 노후도 실태조사에 의한 노후화 요인 분석.평가에 관한 연구)

  • 강석표;김규용;권영진;정성철;이덕찬;송병창;김무한
    • Proceedings of the Korea Concrete Institute Conference
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    • 1998.04a
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    • pp.391-396
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    • 1998
  • The concrete structures are hardly ever built under ideal conditions. So many defects may occur for a various reasons such as unsuitable and defective materials, construction methods, poor workmanship, particular structural form and prevailing weather conditions. Some structural form can greatly increase the risk of occurrence of defects. Therefore we investigated the actual condition of the deterioration factors for reinforced concrete apartment, which was composed of 85 apartments with various building ages in different regions with five evaluation the deterioration factors of apartment building to establish the overall evaluation system of deterioration degree for reinforced concrete apartment in Korea.

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Evaluation Method of Deterioration Grade for Remodeling Old Educational Facilities(III) - Synthetic Judgment Method of Deterioration Grade of Finished Materials - (교육시설(敎育施設)의 리모델링을 위한 구성재료(構成材料)의 노후화(老朽化) 판정기준(判定基準) 작성(作成)(III) - 주요(主要) 마감재료(材料)의 노후도(老朽度) 종합판정방법(綜合判定方法) 제시(提示) -)

  • Seo, Chee-Ho;Choi, Min-Kwon;Choi, Soo-Kyung;Oh, Se-Chul;Kwon, Yong-Kyun
    • Journal of the Korean Institute of Educational Facilities
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    • v.11 no.1
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    • pp.15-23
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    • 2004
  • Deterioration of the educational facilities built before 1985 is a serious situation. The purpose of this study is to present the efficient remodeling method of old educational facilities. This paper, part III, presents the systemic and synthetic judgment method of deterioration grade of finished materials. Evaluation of the deterioration is carried out in every eight classrooms or building elements divided by the use. And classrooms are divided by several parts for example floor, wall and ceiling etc.. The whole deterioration of the building judges the result of every part collectively.