• 제목/요약/키워드: concrete object

검색결과 308건 처리시간 0.024초

양생온도 변화가 고성능 콘크리트의 압축강도에 미치는 영향에 관한 연구 (A Study on the Effects of Curing Temperature for Compressive Strength of High Performance Concrete)

  • 노인철
    • 한국건축시공학회지
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    • 제2권4호
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    • pp.163-168
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    • 2002
  • The object of this study is to define the characteristics of high performance concrete with varing compressive strength of concrete and curing temperature. The major test variables are 1) high strength concrete(500kg/$cm^2$) and ordinary strength concrete(240kg/$cm^2$) compressive strength, 2) curing temperature and condition, 3) concrete curing age, 4) three types of cement. From the test results were shown that curing temperature and curing conditions were also very effective for high strength concrete and ordinary strength concrete, and concrete were largely effected by cement type and temperature during the hydration reaction process. This paper describes the effect of curing temperature for strength and characteristics of high performance concrete.

객체지향기법을 이용한 플레이트 거더교의 동해석 (Dynamic Analysis of Plate Girder Bridge Using Object-Oriented Technique)

  • 조정래;곽종원;진원종;최은석;강재윤;이정우
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2006년도 춘계학술발표회 논문집(I)
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    • pp.486-489
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    • 2006
  • This paper presents a newly proposed object-oriented finite element framework and its applications on dynamic analysis of plate girder bridge. The developed framework supports various types of finite elements, materials, constraints, loads, and solution methods. One major feature different from other object-oriented finite element programs is that static model and dynamic state can be easily read from or written to a file. In addition, the framework supports efficient DOF pattern handling for a node connecting elements with different DOF patterns, new multi-point constraint handling, and various scripting languages for easy use of the library. In order to show the applicability to dynamic analysis, dynamic moving load analysis on plate girder bridge is performed.

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방식재료가 콘크리트의 투수성에 미치는 영향에 관한 연구 (A Study on the Effect of Corrosion Inhibitors for Concrete Permeability)

  • 이상엽;한만엽;이차돈;엄주용
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1997년도 봄 학술발표회 논문집
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    • pp.241-247
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    • 1997
  • Reinforced concrete is in general known as high durability construction material under normal enviroments due to strong alkalinity of cement. Marine and harbour concrete as well as concrete mixed with seasand for fine aggregate are exposed to detrimental saltwater wich cause to accel-eate corrosion of reinforcing steel in concrete. If corrosion resistance of concrete gets to weaken due to carbonation and crack in cover concrete, concrete durability rapidly decrease by corrosion of reinforcement steel embedded in concrete. This research is to investigate basic physical properties of various corrosion inhibitors and to evaluate their corrosion resistance in concrete mixed with seasand. The object of this study is develop appropriate corrosion protection systems so as to enhance the durability of concrete.

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설계패턴을 이용한 객체지향 방법론에 관한 연구 (A Study on the Object-Oriented Methodology on the Basis of Design Patterns)

  • 김치수;임경미;권민주
    • 한국정보처리학회논문지
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    • 제6권6호
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    • pp.1556-1562
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    • 1999
  • 융통성 있는 소프트웨어 개발을 위해 많은 객체지향방법론들이 제공되어 지고 있으나, 이러한 객체지향방법론들은 자동적으로 재사용을 제공하거나 건실한 소프트웨어 시스템을 만들지 못하고 있다. 따라서 이러한 객체지향 방법론들은 개발자에게 상세한 설계지침을 제공하지 못하고 있으며, 분석·설계자들로 이런 문제점들을 인정하고 방법론들을 향상시켜 나가려고 노력하고 있다. 이와 같이 분석·설계자들의 노력을 줄여 주면서 설계단계의 정보를 재사용할 수 있도록 제공하고자 하는 것이 설계패턴의 개념이며, 이러한 설계패턴과 객체지향 방법론은 상호 보완적인 관계를 가지면서 시스템을 개발하는데 유용한 설계 길잡이의 역할을 한다. 이에 본 논문에서는 객체지향 방법론 중에서 가장 많이 다루어지고 있는 OMT 방법론과 Gamma가 제안한 설계패턴 중 Facade, Mediator, Observer의 세 가지 설계패턴에 대한 상호작용을 보여주고, OMT방법론 내에 설계패턴을 적용함으로써 구체적인 설계지식과 재사용에 대한 명확한 해법을 제안한다.

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Computer Aided Design of RC Structures

  • Islam, S.M. Shahidul;Khennane, A.
    • International Journal of Concrete Structures and Materials
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    • 제7권2호
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    • pp.127-133
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    • 2013
  • After reviewing the background and motivations for using modern computational methods for the design of reinforced concrete structures, an algorithm making use of the object oriented programming language Python and professionally developed finite element software is presented for the sizing and placement of the reinforcement in RC structures. The developed method is then used to design the reinforcement of a deep beam. To validate the design, two identical deep beam specimens were manufactured with the obtained steel, and then tested in the laboratory. It was found that the experimental results corroborated those predicted with the finite element design method.

부착특성을 고려한 휨모멘트-곡률 관계에 관한 연구 (Study on the Relationships of Bending Moment-Corvature Based on Bond Property)

  • 장일영
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1991년도 봄 학술발표회 논문집
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    • pp.81-85
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    • 1991
  • The object of this study is to propose the bending moment-curvature relationships based on the bond properties between concrete and steel for noncraking zone, and evaluate the flexural displacement of reinforced concrete members. The bond-slip relationship and the strain hardening effect of steel were taken into account in order to evaluate the spacing of the cracks and the curvature distribution. Calculated curvature distribution along the longitudinal axis was transformed into equivalent curvature distribution. The flexural displacement was calculated by means of double intergral of the equivalent curvature. Calculated values are in good agreement with the experimental data.

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에폭시계 보수재료의 재료특성 및 내구성능 분석 (A Study on the Material Properties and Durabilities of Epoxy-Type Repairing Materials)

  • 김도겸;이장화;박승범
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1997년도 가을 학술발표회 논문집
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    • pp.659-664
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    • 1997
  • RC structures can deteriorate for many defective factors. In the repair and retrofit works of concrete, epoxy resins are widely used as repair materials. The object of this study is to investigate the material properties and durabilities of epoxy resins which are commonly used in repairing concrete. The material properties such as line-expansion modulus, viscosity, microstructure and physical parameter as well as the durabilities such as gravity change, tensile strength, elongation change were carried out.

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철근이 부식된 콘크리트구조물용 보수재료의 내구성능 평가 (Evaluation of Durability on the Repair Materials of Concrete Structures)

  • 문한영;이창수;김성수;김홍삼;곽도연
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1998년도 가을 학술발표대회 논문집(III)
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    • pp.857-860
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    • 1998
  • Reinforced concrete structure is deteriorated, as time goes on. So many repair materials are developed for the repair. But repair materials have not been adequately applied so far. Because the datum which evaluated the repair materials are not sufficient. The object of this study is estimation f repair materials that is in general use and establish method of application. To acquire the result, we have made experiments on chemical attack, carbonation and chloride permeability test. The carbonation and chloride permeability are very different. Some repair materials are poorer than portland cement mortar.

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외국산시멘트 사용 콘크리트의 경화불량 원인에 대한 사례연구 (A Case Study on Retarded Hardening of concrete Used Imported Cement)

  • 이양수;김남호;김원기;정재동
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1992년도 봄 학술발표회 논문집
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    • pp.23-28
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    • 1992
  • In recent years, due to the construction boom the demand of cement is increasing suddenly and the use of imported cement is inevitable. But, because the quality of imported cement varies quite a lot, many problems have been encountered in construction fields. These problems include hardening retardation, lower early strength and crack of concrete. The object of this study is to explain causes for hardening retardation from a construction field case and propose a solution

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구체콘크리트면에 받는 열온도의 시뮬레이션 실험 (The Estimation of Surface Temperature of Concrete Frame Caused by Fire)

  • ;;오상근;정환목;최희용
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1997년도 봄 학술발표회 논문집
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    • pp.272-277
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    • 1997
  • The object of this paper is to analyze the surface temperature of RC structures caused by fire. The experimental analysis is undertaken by using following two methods. 1) Simulation to analyze the relationship between the temperature and the condition change for glass wool caused by fire. 2) Temperature-analysis (TG/DTA tests) of RC structures. From the results of the two experimental analysis, it was possible to estimate the temperature of RC concrete structures caused by fire.

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