http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
외부 긴장된 탄소섬유판으로 보강된 실물모형 RC보의 휨 보강
유영찬(You Young-Chan),최기선(Choi Ki-Sun),김긍환(Kim Kueng-Hwan) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.9
A full-scaled model test has been performed in order to investigate the behavior of RC beams strengthened with externally post-tensioned CFRP(Carbon Fiber Reinforced Polymer) system. At the same time, flexural strengthening test results obtained from a series of small-scaled RC beam with respect to many parameter in the previous studies were verified. A total of 4 specimens have been manufactured including unstrengthened control beam. The specimens strengthened with post-tensioned CFRP strips consist of bonded and unbonded systems with 2 different types of mechanical anchorages. The post-tensioning force of 50% of CFRP tensile strength which is considered optimum in the previous studies was applied. From the test results, it was found that all the specimens strengthened with post-tensioned CFRP strips finally failed by the rupture of CFRP strips regardless of post-tensioning system because the anchorage can clamps the CFRP strips up to its rupture strength. On the contrary, specimens strengthened with simply bonded CFRP strips showed debonding failure below 50% of CFRP tensile strength due to premature debonding. Also Increase in cracking load, yielding load and nominal strength were observed at the specimen strengthened with post-tensioned CFRP strips, resulting in improved strengthening performance. Therefore, the full strength of CFRP strips can be utilized in strengthening by introducing post-tensioning of 50% of its tensile strength.
유영찬 ( You Young Chan ),이현지 ( Lee Hyun Jee ),신지욱 ( Shin Ji Uk ),김민선 ( Kim Min Sun ),최기선 ( Choi Ki Sun ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
This paper presents the basic data for the structural safety study of the extension wall by evaluating the bending stresses of the existing and extension walls varying according to the plan change of the extension building through the numerical analysis on the horizontal load as follows: 1) the stress variation of the divided wall when the wall opening due to a partial demolition is evaluated by comparing the result of analysis on whether or not the opening of the bearing wall is demolished as a variable; 2) the stress variation of the existing wall due to the increase of the stiffness of the extension wall is also evaluated by comparing the result of analysis on the thickness of the extension wall as a variable.