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이홍표(Lee, Hong-Pyo),송영철(Song, Young-Chul),서용표(Suh, Young-Pyo) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1
This paper is mainly forced experimental study on the tension stiffening effect of reinforced concrete at nuclear power plants. The main parameter used in the test is cover thickness of the specimens and the ratio of the steel. Due to increase the cover thickness, tension stiffening effect between the concrete and the embedded steel showed to be increased, gradually.
나환선(Nah Hwan-Seon),서용표(Suh Young-Pyo) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.9 No.2
The purpose of this research is related to evaluate the flexural behavior of reinforced concrete beam main re-bar mechanically spliced by parallel threaded coupler. To compare the existent lapping method with newly designed mechanical lapping method, five kinds of concrete beam specimens based on several kinds of lapping 22㎜ diameter re-bar are tested to be failed flexurally by cyclic loading. The relation between load and displacement, ductility, maximum load was comparatively analyzed, according to test results, energy dissipation capacity of flexural specimen mechanically spliced by parallel threaded coupler is 1.6 times greater than that of the other flexural specimens. The ductility of specimen mechanically spliced by parallel threaded coupler is at least 2 times better than concrete specimen with lap spliced re-bar.
나환선 ( Nah¸ Hwan-seon ),서용표 ( Suh¸ Yong-pyo ),송영철 ( Song¸ Young-chol ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.2
The purpose of this study is to quantitatively evaluate the aging status of epoxy coating onto containment structure in nuclear power plant. Prior to main accelerated aging test, pre-test under short term acceleration was performed to identify the reliability of relation between visual and ultrasonic testing results. Time-dependent degradation results of epoxy coating taken by VT were different from results taken by UT. According to aging acceleration factor, degradation pattern of epoxy coating by VT was similar not only to that by UT, but also to that by elongation change. The possibility to develop new methodology for investigation of time-dependent epoxy coating was identified.
나환선 ( Nah Hwan-seon ),서용표 ( Suh Young-pyo ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
The purpose of this research is related to evaluate the flexural behavior of reinforced concrete beam main re-bar mechanically spliced by parallel threaded coupler. To compare the existent lapping method with newly designed mechanical lapping method, five kinds of concrete beam specimens based on several kinds of lapping 22mm diameter re-bar are tested to be failed flexurally by cyclic loading. The relation between load and displacement, ductility, maximum load was comparatively analyzed, according to test results, energy dissipation capacity of flexural specimen mechanically spliced by parallel threaded coupler is 1.6 times greater than that of the other flexural specimens. The ductility of specimen mechanically spliced by parallel threaded coupler is at least 2 times better than concrete specimen with lap spliced re-bar.
이홍표 ( Lee Hong-pyo ),송영철 ( Song Young-chul ),서용표 ( Suh Young-pyo ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
This paper is mainly forced experimental study on the tension stiffening effect of reinforced concrete at nuclear power plants. The main parameter used in the test is cover thickness of the specimens and the ratio of the steel. Due to increase the cover thickness, tension stiffening effect between the concrete and the embedded steel showed to be increased, gradually.