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초고층건물 RC코어와 SRC기둥의 기둥축소량 해석 및 현장계측
김한수(Kim Han-Soo),조석희(Cho Suk-Hee),김도균(Kim Do-Kyoon) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.11
The effect of column shortening is one of the major considerations in tall buildings, especially in concrete and composite structural system. The calculation method presented by PCA is most widely used for analyzing column shortening, but the results can be different according to the development of shrinkage with time suggested by ACI, CEB-FIP and PCA. Therefore, it is necessary to compare the calculated results with field measurement for more adequate shortening analysis and compensation. This paper represents analyzed and measured shortening results of RC cores and SRC columns at the 69 story Mok-Dong Hyperion apartment. It shows that the analysis results using the development of shrinkage with time of CEB and PCA are more consistent with measured values than those of ACI.
고강도강 혼용 사용을 위한 SM570TMC강 보-기둥 접합부의 성능평가 및 해석 비교
김문정 ( Moon Jeong Kim ),조석희 ( Suk Hee Cho ),하태욱 ( Tae Uk Ha ),강창훈 ( Chang Hoon Kang ),최우혁 ( Woo Hyuk Choi ),김정학 ( Jung Hak Kim ) 한국복합신소재구조학회 2013 복합신소재구조학회논문집 Vol.4 No.3
In recent years, the construction of high-rise buildings are promoted. According to these, there are many needs about new technologies to strengthen the building performance and high-strength steel is regarded as one of these for promoting building performance. In Korea, high-strength steels which stress are over 600MPa are on market and in aborad, super high-strength steels over 1000MPa are developing and they expected to promote the building performance. But there are still doubts about applying high-strength steel members because of size effect and worry of brittle fracture. In this reports, we propose results of performance and analysis tests for use with general steel. We propose the characteristic of high-strength steels first and next the results of performance test to show they satisfy the performance that designers expect. And last, we compare the results of test and analysis for acquire the alanysis reliability in non-linear analysis with high-strength steels.
구속조건 변화와 크리프에 의한 응력 완화를 고려한 고층건물 콘크리트 슬래브의 건조수축 응력해석
김한수(Kim Han-Soo),조석희(Cho Suk-Hee) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.1
Shrinkage strains of concrete slab in multi-story building are restrained by structural members such as columns or walls. These can induce tensile stresses in concrete members and lead to cracks due to excessive shrinkage stress. In this study, a method of shrinkage stress analysis on concrete slab in multi-story building is proposed, which considers both material properties such as shrinkage and creep and construction sequence. The relaxation coefficient of shrinkage stress is defined and actual shrinkage stress is obtained by multiplying the defined coefficient to elastic shrinkage stress. Considering the variation of restraint and shrinkage strain, the analytical method for elastic shrinkage stress, which can be obtained by summing up the analysis result from the analytical models representing the construction sequence, is proposed. The results of 10-story example building show that shrinkage stresses of lower floors are greater than those of upper floors, that is, stresses of lower floors(1∼2Fl.) only exceed tensile strength of concrete. The stress of 1st floor, which was the highest, resulted in less than 31% of the elastic stress of fully restrained member.