http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
PP 섬유를 함유한 고강도 철근콘크리트 기둥의 폭열 특성에 관한 실험적 연구
강신준 ( Kang Shin-june ),신성우 ( Shin Sung-woo ),이광수 ( Lee Kwang Su ),안종문 ( An Jong Mun ),유석형 ( Yoo Suck Hyung ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
A spalling is defined as the damages of concrete exposed to high temperature during the fire by causing cracks and localized bursting of small pieces of concrete. It is reported that spalling is caused by the vapor pressure and polypropylene(PP) fiber has an important role in protecting from spalling. The properties of fire resistance of high-strength reinforced concrete columns under various concrete strength and various contents of PP fiber were investigated in this study. Inner temperature was measured by three thermocouples located in specimens. For one hour heating the temperature of thermocouple at 25mm was rapidly raised because of covering exfoliation by spalling. After one hour heating Spalling occured in specimens contained PP fiber of 0% and 0.1, but it didn’t occur in specimen contained PP fiber of 0.2%. As a residual strength test result, the loss of axial load decreases as the amount of PP fiber increases.
PP 섬유를 함유한 고강도 철근콘크리트 기둥의 폭열 특성에 관한 실험적 연구
강신준(Kang Shin-June),신성우(Shin Sung-Woo),이광수(Lee Kwang Su),안종문(An Jong Mun),유석형(Yoo Suck Hyung) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
A spalling is defined as the damages of concrete exposed to high temperature during the fire by causing cracks and localized bursting of small pieces of concrete. It is reported that spalling is caused by the vapor pressure and polypropylene(PP) fiber has an important role in protecting from spalling The properties of fire resistance of high-strength reinforced concrete columns under various concrete strength and various contents of PP fiber were investigated in this study Inner temperature was measured by three thermocouples located In specimens For one hour heating the temperature of thermocouple at 25mm was rapidly raised because of covering exfoliation by spalling. After one hour heating Spalling occured in specimens contained PP fiber of 0% and 01, but it didn't occur in specimen contained PP fiber of 0.2%. As a residual strength test result the loss of axial load decreases as the amount of PP fiber Increases.
이한승 ( Lee Han-seung ),안종문 ( An Jong-moon ),신성우 ( Shin Sung-woo ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.2
The purpose of this research is to evaluate the effectiveness of lithium nitrate as a corrosion inhibitor in mortar containing chloride. In the experiment, test specimens of mortar to which chloride and lithium nitrite had been added, were subjected to accelerated corrosion by means of repeated drying and wetting on condition of high temperature. From the results of the experiments, it was confirmed that the lithium nitrite inhibitor over dosage 0.6 (NO<sub>2</sub>/CD molar ratio is very effective in protecting reinforcement from corrosion in mortar in which chloride ions have contain.
신성우 ( Shin Sung-woo ),반병열 ( Bahn Byong-youl ),이광수 ( Lee Kwang-Soo ),안종문 ( An Jong-moon ) 한국구조물진단유지관리공학회 1997 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.1 No.1
This paper presents an experimental study of the behavior of concrete confined with carbon fiber sheets under compressive loading. Effect of key variables as number of carbon fiber sheets is investgated in the present research program. The behavior of concrete cylinders confined with carbon fiber sheets is characterized by the increase of concrete strength, leading to the sudden failure of concrete cylinders after the lateral confinements tears off. After strain in the confined concrete corresponding to peak stress of unconfined concrete reach, important gains in strength and toughness are observed for the well-confined concrete cylinders.