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비틀림 하중(荷重)을 받는 심벽구조물(心壁構造物)의 해석(解析)에 관한 연구(?究)
김성칠,Kim, Sung Chil 대한토목학회 1983 대한토목학회논문집 Vol.3 No.2
고층건물에서의 전단벽(剪斷壁)은 횡하중을 지지(支持)하기 위해서 설치되는 구조물이다. 이 전단벽(剪斷壁)의 단면의 형태는 여러 가지 형태가 있을 수 있는데 개방단면을 갖게 되는 경우 이 부재는 비틀림에 약하기 때문에 이 점이 문제가 된다. 특히 그 구조물이 thin walled member인 경우는 더욱 그러하다. 최근에는 건물이 점점 고층화됨에 따라 이 문제는 더욱더 중요(重要)시 되어 보다 정확한 지식이 요구(要求)되고 있다. 본 논문(論文)에서는 고층건물에 설치되는 에리베이터 츄브가 전단벽 역할을 하는 경우로 단면의 형태는 channel형이고, 각 층마다 중방(中枋)(connecting beam)에 의해서 개방단면의 일부가 닫혀있게 되는 경우의 문제를 택하였다. 이를 해석(解析)하는데 복잡한 계산과 많은 계산량을 줄이고 적용에 대한 융통성을 부여하기 위해서 discrete 방법(方法)과 transfer matrix method을 사용(使用)하였다. 중방(中枋)의 영향을 고려함에 있어서는 중방(中枋)의 강도가 클 때나 적을 때나 합리적(合理的)으로 사용할 수 있는 식(式)을 적용하였다. 특히 이 방법(方法)은 불규칙한 변단면에도 쉽게 적용할 수 있을뿐만 아니라 여러 가지 하중조건에 대한 해를 일일이 구할 필요가 없으며, 형성되는 transfer matrix의 크기가 $4{\times}4$ 밖에 안되므로 쉽게 구할 수 있다. Core walls for tall building is one of the structures to support lateral load. Since most structural elements used for resisting which ate relatively weak against torsion, it is important to investigate tosional effects in the analysis and design of tall buildings. Rutenberg proposed a more refined theory on the torsional analysis of core walls which can be used when the stiffness of lintel beams are small or large. In this paper a more refined method to analysis the torsion of core wall structures with variable cross sections and being subjected to arbitrarilly distributed load was suggested. To reduce complex and a great number of calculations and to enhance the generality and flexibility of application of this method, the discrete method using transfer matrix formulation was used. Then this method can be easily applied to irregular and variational sections, has no necessity to get particular solution for each of loading conditions, and the maximum size of matrix calculated is $4{\times}4$, which makes this approach more appropriate for design office calculations using comuters of any sizes or even desk calculators.
국내.외산 경량골재를 사용한 경량콘크리트의 압축강도 비교실험 연구
김성칠(Kim, Sung-Chil),김성곤(Kim, Sung-Gon) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
In recent days, while taller and more massive structures such as huge bridges have been welcomed, the structural stabilization in structural design and construction of concrete structures has been gradually limited more and more by the major weakness of current concrete that its weight is relatively heavier when compared with its strength. In this regard, the study is focused on the suggestion for the development of lightweight concrete in strength, to which artificial lightweight aggregate is added, gained through experiments, to promote the proper and efficient application of lightweight concrete to future structures spanning more seas and reaching closer to sky.
매스콘크리트 온도균열제어를 위한 콘크리트 배합설계에 관한 연구
김성칠 ( Kim Sung Chil ),박성용 ( Park Sung Yong ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
To control thermal crack we executed that low generation heat mix design and analyzed the reduction effect of the thermal crack by using the various method of construction, the use of PC agent showed the effect of temperature reduction and increasement in compressive strength. In equal mix design condition, we could know that the placing temperature was more effective than placing method and height on the construction method.
김성칠 ( Kim Sung-chil ),김해수 ( Kim Hea-su ),전민하 ( Chun Min-ha ),김형윤 ( Kim Hyeong-yun ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1
Social overhead capitals such as roads, harbors and large structures have been recently constructed along with economic development. It is particularly expected that the various coastal structures, which are petroleum reserving facilities, entertainment facilities, and bridges connecting between island and land, or among islands, are rapidly increased and enlarged. Therefore, the durability assessment of concrete structures for salt-attack is indispensable. When coastal concrete structures are designed, it is important to investigate collectively the design, construction and maintenance plans in order to enhance the endurance for salt-damage. When especially designing the durability for salt-attack, the primary design must be carried out based upon the allowance for crack width, the limit of water-cement ratio, the limit of concrete compression strength, the limit of the amount of cement per unit and the limit of covered thickness. In this research, a requirement design table was calculated with various environmental conditions according to the goal of durability lifetime specified on the data sheets. Diffusion equation was solved using Fick’s diffusion law with the variable of the water-cement ratio. The universal validity and simplicity was investigated through the suggestion of requirement design table and real examples. As the result of investigation, the application capability of the suggested requirement design table was excellent, and the calculation for demanding cover was not needed. The investigation of goal durability period was easily verified through graphs.
균열모델에 의한 철근콘크리트 깊은보의 전단파괴거동에 관한 연구
김성칠 ( Kim Sung-chil ),박성용 ( Park Sung-yong ),정낙민 ( Jung Nak-min ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1
In the experiments, 24 test specimens with 4 different cases were tested. In the analytical study, the finite element method with two crack models are utilized. Two different types of crack model, fixed and rotation crack models, are used in the analysis for the test specimens. From the investigations following conclusions are derived. The maximum loads obtained by the unite element analysis using the rotation crack model is coincided with the experimental results, but the results obtained by using the fixed crack model were less than the experimental results. It is considered to be the reason that the cracking and the inclined crack distribution were simulated well by the unite element analysis using rotation crack model when the specimen fails. From the results obtained, it is found that the finite element analysis using the rotation crack model to predict the shear behavior of reinforced concrete member is more appropriate.
[제3분과/구조거동/재료] 균열모델에 의한 철근콘크리트 깊은보의 전단파괴거동에 관한 연구
김성칠(Kim Sung-Chil),박성용(Park Sung-Yong),정낙민(Jung Nak-Min) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
In the experiments, 24 test specimens with 4 different cases were tested. In the analytical study, the finite element method with two crack models are utilized. Two different types of crack model, fixed and rotation crack models, are used in the analysis for the test specimens. From the investigations following conclusions are derived. The maximum loads obtained by the finite element analysis using the rotation crack model is coincided with the experimental results, but the results obtained by using the fixed crack model were less than the experimental results. It is considered to be the reason that the cracking and the inclined crack distribution were simulated well by the finite element analysis using rotation crack model when the specimen fails. From the results obtained, it is found that the finite element analysis using the rotation crack model to predict the shear behavior of reinforced concrete member is more appropriate
[제5분과/내구성/진단 및 보수·보강] 염해에 대한 해양 콘크리트 구조물의 내구성 평가
김성칠(Kim Sung-Chil),김해수(Kim Hea-su),전민하(Chun Min-Ha),김형윤(Kim Hyeong-yun) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
Social overhead capitals such as roads, harbors and large structures have been recently constructed along with economic development. It is particularly expected that the various coastal structures, which are petroleum reserving facilities, entertainment facilities, and bridges connecting between island and land, or among islands, are rapidly increased and enlarged. Therefore, the durability assessment of concrete structures for salt-attack IS indispensable. When coastal concrete structures are designed, it is important to investigate collectively the design, construction and maintenance plans in order to enhance the endurance for salt-damage. When especially designing the durability for salt-attack, the primary design must be carried out based upon the allowance for crack width, the limit of water-cement ratio, the limit of concrete compression strength, the limit of the amount of cement per unit and the limit of covered thickness. In this research, a requirement design table was calculated with various environmental conditions according to the goal of durability lifetime specified on the data sheets. Diffusion equation was solved using Fick's diffusion law with the variable of the water-cement ratio. The universal validity and simplicity was investigated through the suggestion of requirement design table and real examples. As the result of investigation, the application capability of the suggested requirement design table was excellent, and the calculation for demanding cover was not needed. The investigation of goal durability period was easily verified through graphs.
전단철근비에 따른 철근 콘크리트 깊은보의 전단거동에 관한 해석적 연구
김성칠(Kim Sung Chil),박성용(Park Sung Yong),천성봉(Chun Sung Bong) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-
The effectiveness of web shear steel ratio in Deep beam was performed by nonlinear finite element method. Results of FEM were compared with ACI code and equations of reference. In concrete shear strength, ACI results had 1.2-1.5times safe factor for FEM. Presence of vertical web reinforcement increased ultimate shear strength of deep beams, However, vertical stirrup's effectiveness seamed to increase for beams with a/d>1.0. Horizontal web reinforcement appeared to have little influence on the ultimate shear strength. Its influence was more noticeable in beams with a/d<1.0
전단철근비에 따른 철근 콘크리트 깊은보의 전단거동에 관한 해석적 연구
김성칠 ( Kim Sung Chil ),박성용 ( Park Sung Yong ),천성봉 ( Chun Sung Bong ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.7 No.1
The effectiveness of web shear steel ratio in Deep beam was performed by nonlinear finite element method. Results of FEM were compared with ACI code and equations of reference. In concrete shear strength, ACI results had 1.2~1.5times safe factor for FEM. Presence of vertical web reinforcement increased ultimate shear strength of deep beams, However, vertical stirrup's effectiveness seamed to increase for beams with a/d>1.0. Horizontal web reinforcement appeared to have little influence on the ultimate shear strength. Its influence was more noticeable in beams with a/d<1.0