• Title/Summary/Keyword: Durability Performance Evaluation

검색결과 408건 처리시간 0.023초

규산질계 분말형 도포 방수재(KS F 4918) 시험 평가방법 개선방안 연구 (Improvement of Evaluation Method in Cement Mixed Siliceous Powder Waterproofing Coatings)

  • 김명지;주희정;김수연;임남기;오상근
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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    • pp.19-20
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    • 2019
  • The purpose of this study is to apply a test method that evaluates durability under wet environment rather than the strength of the material itself to reflect the environment of use and field conditions of silic acid powder applied waterproof material, and to prepare a foundation data for differentiated performance criteria through test verification.

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배전 실증시험장 시스템 현황 소개 (Introduction of the field - test evaluation system in KEPCO)

  • 김동명;최선규;장상옥;오재형
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2004년도 춘계학술대회 논문집
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    • pp.81-85
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    • 2004
  • This paper describes the testing facility to demonstrate the performance of the distribution class circuit breakers and switchgears and the testing methods. The field-test evaluation system consists of two parts. One is the distribution system for simulation of the condition on interruption mode of switches which are installed in the system and tested by the AFG(Artificial Fault Generator) and the thunderbolt generator just like in the real field. The other is a laboratory for confirmation or the important characteristics regarding to the insulation, gas, environment durability of equipment. For the fatal failure mode, a FMEA(Failure Modes and Effects Analysis) technique which is a kind of a structural analysis to consider a counter-plan was emploved.

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DEA에 의한 다속성 품질의 평가방법에 관한 연구 -전기보온솥의 사례를 중심으로- (Evaluation method of multi-attribute quality using data envelopment analysis)

  • 이진춘
    • 품질경영학회지
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    • 제25권2호
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    • pp.169-188
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    • 1997
  • The purpose of this study is concerned with suggesting a new a, pp.oach to evaluating the overall product quality in the sense of the relative efficiency of products, whose quality is measured with 8-dimensional attributes, suggested by Garvin. The attributes included 8 quality measures, that is, performance, features, reliability, conformance, durability, serviceabilit, aesthetics, and perceived quality. This study, also, introduced DEA(Data Envelopment Analysis) as an evaluation tool to tackle the problem of how to measure one product against another when each product can be measured along a number of dimensions, and given that there exists no a priori satisfactory weighting scheme to combine these dimensions into an overall rating for each products. In order to a, pp.y the DEA to evaluating the products, we must define two concepts, such as DMU(Decision Making Units) and input-output relationship. Finally, the suggested method in this study was validated through a case study of the electric jar, and this DEA a, pp.oach can be used in evaluating the other products with multi-attrribute quality.

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정량적 엔진평가에 의한 엔진 윤활유 평가기술

  • 전상명
    • Tribology and Lubricants
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    • 제13권2호
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    • pp.8-15
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    • 1997
  • It is very difficult to express the state of a tested engine objectively concerning the malfunction, failure and wear of an engine. The general method of engine evaluation is to express evaluator's opinion for the engine state after testing. However, these methods is only subjective evaluation because test engineers, designers, and evaluators does not easily coincide in opinion. Therefore, in this article, the method of engine rating are introduced in order to represent the qualitative trends into quantitative value. The purpose of Engine Rating is to assign a quantified value to the tribology state of a tested engines. Originally, this Engine Rating method have been used to evaluate the performance of engine oil quantitavely. Using this method, we can predict the proper interval of engine oil change due to its objectivity. So, we can prevent the frequent change of engine oil and protect the environmental contamination. Furthermore, this method can be used to tell the general state of a tested engine after finishing engine durability tests. A single merit scale is used to evaluate numerically the state of cleanliness and the mechanical condition. Generally, a part which is absolutely clean or shows no wear, is rated merit 10. A part which is absolutely dirty or very worn, is rated merit 0.

습윤 환경 구조물에 적용하는 누수균열 보수용 방수씰의 성능평가 방법에 관한 연구 (A Study on the Performance Evaluation Method of Waterproofing-Seal as Leakage Crack Repairing Material using in Wet Environment Structure)

  • 강효진;우영제;강호경;오상근
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2002년도 학술.기술논문발표회
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    • pp.43-48
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    • 2002
  • Since the basement building like the communication hole and etc. is built under the ground where it is pressed by the water, the leakage happens due to the dried-shrinking crack, the sinking crack, the creation of the work-joint of the building and etc. caused by the character of the material and construction way of the reinforced concrete building. Especially, a lot of repair for the leakage cannot help but being taken in temporary way without any noticeable countermeasure. Therefore, this kind of repair is socially criticized many times that this is defective construction even if this costs a lot. The fundamental reason of the above mentioned symptoms can be found in the creation of the work-joint caused by the character of the concrete building, the limitation of the physical performance of the existing water-proof and repair material, the limitation of the construction, the limitation of the physical sustaining performance of the concrete building, the limitation(heat-injury, deterioration) of the constancy of the durability caused by aging and etc. Therefore, in this study, we would like to present the better understanding on the water-proof seal relating to the application at the spot and its test evaluation related data since the necessity of the establishment of the quality control standard and the performance testing way on the relevant water-proof seal is rising a lot to regulate the water-proof technology and the leakage repair technology in accordance with the growth of the demand on the facility.

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양이온화 실리케이트 섬유 개질재(CSM)를 활용한 비배수성 아스팔트 혼합물의 성능 평가 (Performance Evaluation of Impermeable Asphalt Mixture using Cationized Silicate Fiber Modifier )

  • 김영욱;태선규;김영수;김다이애나;장영일
    • 한국구조물진단유지관리공학회 논문집
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    • 제28권3호
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    • pp.59-65
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    • 2024
  • 본 연구에서는 아스팔트 혼합물의 역학적 특성 및 내구성을 향상시키기 위해 양이온 처리된 실리케이트 섬유를 활용한 개질재(CSM, Cationized Silicate Modifier)를 아스팔트에 적용하여 최적 혼입률 조건을 도출하였다. 개질 아스팔트 바인더를 활용한 아스팔트 혼합물의 배합설계를 실시하였으며, 최적 배합 조건을 대상으로 수분저항성 및 동적안정도의 내구성을 평가하였다. 평가결과 관련 지침에서 규정하고 있는 기준을 상회하는 것으로 나타났으며, 최적 배합비를 대상으로 투수시험을 실시한 결과 비배수성능을 확보하는 것으로 확인되었다. 현장 시험시공을 통해 소음저감 성능을 검토한 결과 포장 전 대비 약 10 dB의 소음 저감 성능을 확보하였으며, 추후 지속적인 소음 발생도 평가를 통해 신뢰성을 확보할 필요가 있을 것으로 판단된다.

Performance Evaluation of Sprayed Ductile Fiber-Reinforced Mortar as a Repairing Material

  • Kang, Su-Tae;Koh, Kyung-Taek;Ryu, Gum-Sung;Kim, Jin-Soo;Han, Cheon-Goo
    • International Journal of Concrete Structures and Materials
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    • 제2권1호
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    • pp.27-33
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    • 2008
  • Most of existing repair materials have some shortcomings such as brittle fracture, imperfect interface bonding and marked difference in modulus of elasticity compared with the structures. These problems make their repair inefficient. Some researches on using a fiber-reinforced mortar as an alternative to enhance the efficiency have been carried out recently. This paper presents the results of an experimental study on the performance of sprayed PVA fiber-reinforced mortar as a repair material. We evaluated its mechanical properties, durability and strengthening effect. This study shows that the sprayed PVA fiber-reinforced mortar is remarkably effective as a repair material.

반복하중을 받는 철근콘크리트 골조 및 보강시스템의 내진성능 평가 및 개선 (Improvement and Evaluation for Seismic Resistant Capacity of Reinforced Concrete Frame and Braced System under Load Reversals)

  • 김광연;하기주;신종학;이상목;이영범;조용태
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2000년도 가을 학술발표회논문집(I)
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    • pp.109-114
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    • 2000
  • Recently, it is required to improve the structural performance, such as durability and earthquake resistant capacity due to the deterioration of structural components in the existing reinforced concrete building with the old aging and transition of design code. Therefore, the new technology should be developed, such as seismic retrofit and improvement of structural performance in the existing reinforced concrete building. This analytical study was performed to verify the effects of basic and reinforcing system in the reinforced concrete building. The analytical results by nonlinear finite element method were compared with the experimental results and the comparisons are judged to be good.

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지하 콘크리트 구조물 조인트에 대한 멤브레인 방수시스템의 복합 환경 대응 성능 평가 방법 (Complex Environmental Degradation Resistance Performance Evaluation Method of Membrane Waterproofing Systems for Underground Concrete Structure Joint)

  • 오규환;김병일;오상근
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2017년도 춘계 학술논문 발표대회
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    • pp.44-45
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    • 2017
  • There are various national standards designed to test the physical properties of waterproofing materials for the respective countries based on each of their environmental parameters, variables and requirements. The problems of these standard systems can be outlined in the following: (1) there are too many test methods and criteria to satisfy in order assess one waterproofing membrane system, and (2) there is currently no known method to compile the separate testing results to provide a comprehensive report on waterproofing system durability. This paper outlines and compares the performance testing results of various types of asphalt waterproofing membrane systems and discusses the potentials of a complex environmental deterioration analysis method.

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100, 120 MPa급 고강도 콘크리트 적용 바닥판 적정두께 결정을 위한 실험적 연구 (Experimental Study on the Determination of Optimum Thickness of RC Deck Slabs by 100, 120 MPa High-Strength Concrete)

  • 배재현;황훈희;박성용
    • 한국안전학회지
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    • 제33권4호
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    • pp.38-45
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    • 2018
  • Bridges are structures where safety must be ensured. Generally, the destruction mechanism of bridge deck shows punching shear. Lately, the high-strength concrete is often used to increase the lifespan of bridges. The benefits of using the high-strength concrete are that it increases the durability and strength. On the contrary, it reduces the cross-section of the bridges. This study suggested the optimal thickness of bridge deck with application of high-strength concrete and the study evaluated its structural performance experimentally. The evaluation result shows that 180 mm and 190 mm of thickness are optimal for 100 MPa and 120 MPa high-strength concrete bridge deck respectively.