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U형 강박스거더의 휨설계를 위한 합리적인 브레이싱의 형태 및 패널 수 도출에 관한 실험적 연구
심낙훈,박영석 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 논문집 Vol.11 No.1
본 연구에서는 실내실험을 통하여 U형 강박스거더의 상부 수평브레이싱이 휨 거동에 미치는 영향을 파악하고 기존의 수평브레이싱 설계 제안식에 대한 적정성을 검토하기 위하여, 실제 시공되고 있는 U형 강박스 거더 단면의 2/3정도 되는 캔틸레버 형식의 시험체를 제작하여 휨 실험을 수행하였다. 이로써 수집된 데이터를 분석하여 상부 수평브레이싱의 합리적인 휨 설계식 제안을 위한 기초를 마련하였다. 그리고, 상부 수평브레이싱의 형태 및 패널수의 변화에 따른 휨 실험을 통하여 브레이싱 부재의 응력을 측정하고 Helwig가 제안한 설계식으로 구한 값과 비교한 결과 합리적인 브레이싱의 형태 및 패널 수를 얻을 수 있었다. In the present study, tests for U-type steel box girder are performed to observe the effects of W-type and X-type of top lateral bracings on the bending behavior of the U-type steel box girder system. Another objective of the present study is to investigate the adequacy of the currently available design formula. For the structural tests, the test specimen with two third scale of the system constructed in the field was used. In this test, several different spacings are used for the top lateral bracings. The stresses measured from the bending tests are compared with those by the formula proposed by Helwig. An adequate type and the required number of panel for diagonal bracing was obtained.
세라믹메탈재를 적용한 수중 구조체의 보수성능에 관한 실험적 연구
심낙훈 ( Shim Nak-hoon ),박영석 ( Park Young-suk ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
In this study, to evaluate the repairing effects of the ceramic-metal based material at the structure close to a real size and to experimentally apply the results from the laboratory tests to the modelled structure, a reinforced concrete structure was constructed and the selected repairing materials including the ceramic material were placed under the water. From the results of this test based on the reinforced concrete structure, the compressive strength from some cored samples confirmed the ceramic metal as a excellent material and it was found that the material can apply to the structure under an uniaxial load right now. But the flexural bond strength from some cylindrically cored samples was not satisfactory. The bond strength was very lower evaluated than that of the anti-washout underwater concrete as well as that of the epoxy-based material. On the other hand, in the resistance test of sulfate corrosion, the mass variation with time was very stable for all the materials.
세라믹메탈재를 적용한 교각 구조물의 보강성능에 관한 실험적 연구
심낙훈 ( Shim Nak-hoon ),박영석 ( Park Young-suk ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
In this study, to evaluate the repairing effects of the ceramic-metal based material at the structure close to a real size and to experimentally apply the results from the laboratory tests to the modelled structure, a reinforced concrete structure was constructed and the selected repairing materials including the ceramic material were placed. The bending tests are performed to understand the increasing effects of stiffness and ductility for the strengthening of pier specimen. Also, the important purpose of the structural tests is to understand the adhesion performance of the ceramic metal. It is expected the present experimental observations as a valuable source in suggestion improved the strengthening method more than this method by analysis of the failure mode for the specimens.
세라믹메탈재를 적용한 교각 구조물의 보강성능에 관한 실험적 연구
심낙훈(Shim Nak-Hoon),박영석(Park Young-Suk) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
In this study, to evaluate the repairing effects of the ceramic-metal based material at the structure close to a real size and to experimentally apply the results from the laboratory tests to the modelled structure, a reinforced concrete structure was constructed and the selected repairing materials including the ceramic material were placed. The bending tests are performed to understand the increasing effects of stiffness and ductility for the strengthening of pier specimen. Also, the important purpose of the structural tests is to understand the adhesion performance of the ceramic metal. It is expected the present experimental observations as a valuable source in suggestion improved the strengthening method more than this method by analysis of the failure mode for the specimens.