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포스트 텐션으로 보강된 철골 보의 거동에 관한 실험적 연구
김도훈(Kim Do-Hoon),서동기(Seo Dong-Gee),김성배(Kim Sung-Bae),김상모(Kim Sang-Mo),이창남(Lee Chang-Nam) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-
As time goes up, structural capacity of members decreases in structures. The deterioration of the capacity is mainly due to the poor construction, corrosion of steel bars and the neutralization of concrete due to environmental pollution, etc. This deterioration is unavoidable, thus it is necessary to develop the method for repair and retrofit of structures in order to ensure safety of structural members. In this study, to investigate the load-deflection, ultimate strength and yield strength capacity of steel beams strengthened with external post-tensioning tendon and evaluate the degree of their strengthening effect. Test results show that the increasement of external post-tensioning improve the ultimate load and yield load. It is also investigated that the strengthening effect of steel beam in the height of saddle deviated external post-tensioning specimens.
볼트 장력을 이용한 철근콘크리트 기둥의 보강공법에 관한 실험적 연구
김성배(Kim Sung-Bae),서동기(Seo Dong-Gee),김상모(Kim Sang-Mo),이창남(Lee Chang-Nam) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.9
As time goes up, structural capacity of members decreases in reinforced concrete structures. This deterioration is unavoidable, thus it is necessary to develop the method for repair & modification of structures in order to ensure structural safety of members. The purpose of this paper is to investigate the load-deflection, strength evaluation, failure mode, and energy absorption capacity of reinforced concrete columns strengthened with angle and bolt tension, and evaluate the degree of their strengthening effect. For the test, the specimen size of column is 20×20×90㎝ reinforced with 4 number of main bars of 13 mm diameter, tied bars of 6 mm diameter. The test results show that the increasement of bolt and bolt tension's quantity improve the ultimate strength and energy absorption capacity.
포스트 텐션으로 보강된 철골 보의 거동에 관한 실험적 연구
김도훈 ( Kim Do-hoon ),서동기 ( Seo Dong-gee ),김성배 ( Kim Sung-bae ),김상모 ( Kim Sang-mo ),이창남 ( Lee Chang-nam ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.7 No.1
As time goes up, structural capacity of members decreases in structures. The deterioration of the capacity is mainly due to the poor construction, corrosion of steel bars and the neutralization of concrete due to environmental pollution, etc. This deterioration is unavoidable, thus it is necessary to develop the method for repair and retrofit of structures in order to ensure safety of structural members. In this study, to investigate the load-deflection, ultimate strength and yield strength capacity of steel beams strengthened with external post-tensioning tendon and evaluate the degree of their strengthening effect. Test results show that the increasement of external post-tensioning improve the ultimate load and yield load. It is also investigated that the strengthening effect of steel beam in the height of saddle deviated external post-tensioning specimens.
김상섭,김상모,김성배,서동기,김규석,Kim, Sang Seup,Kim, Sang Mo,Kim, Sung Bae,Seo, Dong Gee,Kim, Kyu Suk 한국강구조학회 2004 韓國鋼構造學會 論文集 Vol.16 No.2
일반적인 합성보는 콘크리트 슬래브와 H형강 철골보 사이에 작용하는 수평전단력을 쉬어 코넥터로 긴결하여 휨 내력 및 강성을 증가시킨 구조이다. 본 연구에서 제안한 TSC 구조는 H형강 대신 U형 철골을 사용하고 그 속에 콘크리트를 채운 새로운 형태의 합성보 시스템으로 실험을 통하여 구조특성을 평가 분석 하였다. 또한 실험결과를 통해 T형 합성보(이하 TSC 보라 칭함)의 구조설계 및 시공에 필요한 기초 자료를 제시하고자 한다. Composite action is generally achieved by providing shear connections between steel top flange and concrete topping. Composite sections have greater stiffness than the summation of the individual stiffness of slab and beam. Therefore, they can carry larger loads or similar loads with appreciably smaller deflection and are less prone to transient vibration. T-type Steel Composite beam (TSC-beam) was developed to increase these advantages. Ten specimens were tested for this study. During the experiment, crack pattern and deflection of beam were investigated. The examined results of TSC beam system were compared with results from the typical composite beam and RC beam.
단순지지 TSC 합성보의 부착강도가 휨 내력에 미치는 영향에 관한 실험적 연구
박영수(Park, Young-Soo),허재성(Heo, Jae-Sung),서동기(Seo, Dong-Gee),이창남(Lee, Chang-Nam),김상섭(Kim, Sang-Seup) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1
Recently developed TSC beam is composite structure. Stud bolts were used as shear connectors at the composite beam to resist the horizontal shear forces occurred between concrete slab and U type steel beam. In this study, interface delamination test was conducted to know relationship between bond strength which is affected by crack of concrete and flexural strength of TSC composite beam. Form oil and sand were used for four specimens to generate interface and compared with two standard specimens.
단순지지 TSC 합성보의 부착강도가 휨 내력에 미치는 영향에 관한 실험적 연구
박영수 ( Park Young-soo ),허재성 ( Heo Jae-sung ),서동기 ( Seo Dong-gee ),이창남 ( Lee Chang-nam ),김상섭 ( Kim Sang-seup ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
Recently developed TSC beam is composite structure. Stud bolts were used as shear connectors at the composite beam to resist the horizontal shear forces occurred between concrete slab and U type steel beam. In this study, interface delamination test was conducted to know relationship between bond strength which is affected by crack of concrete and flexural strength of TSC composite beam. Form oil and sand were used for four specimens to generate interface and compared with two standard specimens.
김성배(Kim Sung-Bae),김도훈(Kim Do-Hoon),서동기(Seo Dong-Gee),김상모(Kim Sang-Mo),이창남(Lee Chang-Nam),김상섭(Kim Sang-Seup) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.1
The deteriorated structures ought to be repaired over time to ensure the safety for failure. The capacity of structure is deteriorated to some extent due to the corrosion of steel bars and the neutralization of concrete.<br/> The purpose of this study is to investigate the effect of flexural strength on composite steel beams strengthened with post tensioning method. In order to investigate the data, six test specimens were examined containing the standard and strengthened specimens. The results showed that the increase of post tensioning improves the ultimate load and the yield load.
대구경 볼트와 와이어텐션을 이용한 슬래브 보강공법에 관한 실험적 연구
서동기,노현섭,김상모,이창남,김상섭 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
As time goes up, structural capacity of members decreases in reinforced concrete structures. The deterioration of the capacity is mainly due to the poor construction, corrosion of steel bars and the neutralization of concrete due to environmental pollution, etc. This deterioration is unavoidable, thus it is necessary to develop the method for repair and retrofit of structures in order to ensure structural safety of members. The purpose of this paper is to investigate the load-deflection, ultimate strength, failure mode, and energy absorption capacity of reinforced concrete slabs subject to load experimentally for several variables and grasp the problem of concrete slabs strengthened with large diameter bolts and wire tensioning. And propose foundational research data for4 strengthening reinforced concrete slabs. The test result shows that the capacity of anchorage is controlled by bearing capacity of concrete under the anchorage or punching shear around the anchorage. And the gap between bolts and core hole must be filled to prevent slip and rotation of anchorage.
김도훈,서동기,김성배,김상모,이창남 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
Recently, Building floors are being larger and longer. This is contributed from the development of new design methods and high strength and light weight materials. However, as such longer span floor systems may provide less damping, and have longer period. Therefore, the vibration problem of buildings has become more important. In this research, floor vibration, natural frequency and damping ratio using TSC(T-type Steel Composite beam) composite system were measured by experiments and foreign criteria for serviceability evaluations were applied with responses obtained by walking and heel drop loads. The purpose of this study is to evaluate the serviceability for floor vibration according to the peak acceleration and natural frequency in TSC composite slabs.