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전단스팬비(a/d)에 따른 합성지하벽의 전단내력에 관한 연구
윤용대(Yoon Yong-Dae),서수연(Seo Soo-Yeon),김성수(Kim Seong-Soo) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.11
In order to assess shear strength of non-supporting composite basement wall, the research produced four test objects to examine effect of form tie that resists concrete lateral pressure and shear performance according to Shear Span-to-Depth Ratio (a/d), and to compare test results with standard formula. The result showed that use of form tie that connects formwork and H-Pile did not significantly affect maximum load and yield load, but as for displacement at maximum load, NS1-C60-W15 showed greatest value, which used a form tie. Increasing shear span ratio (a/d) lowered Vexp./Vcal ratio, and the result was closest to Zsutty formula. Results of the test and formula calculation showed less gap when steel H-Pile+concrete was considered for effective depth, rather than considering concrete only. Thus, it is assumed that when calculating shear strength, existing formula can be used by applying entire depth of the composite wall (effective depth) as long as composite ratio is considered.
윤용대 ( Yoon Yong-dae ),서수연 ( Seo Soo-yeon ),윤승조 ( Yoon Seung-joe ),하기주 ( Ha Gee-joo ),임춘근 ( Lim Choon-geun ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
The present research carried out modeling of concrete, H-Pile and stud bolts, which are elements composing a composite basement wall, and the structural behavior was analyzed through nonlinear analysis to assess shear performance of the composite basement wall by utilizing ADINA which is a finite element analysis program. At this time, the analysis was carried out using and a span ratio were set as a variable, and the experimental value was compared and analyzed by using analysis data according to it. As a result of analysis, the analysis body setting All Generate Nodes and Contact Tied-Tied showed the result value most similar to the experimental value in the contact surface elements, but an accurate analysis result couldn’t be obtained in Contact Tied-Not Tie. Much stress was concentrated on the contact surface elements using Contact Tied-Not Tied, and thus, while the rupture between stud bolts and H-pile occurs, the stress transfer was not smoothly carried out, as a result, it didn’t withstand large load and deformation in case of comparing it with other contact surface elements. In an aspect of influence according to the span ration, the bigger the span ratio becomes, the bigger deformation appeared even in less load, and the value similar to the experimental value could be obtained in other contact surface elements in case of comparing with the experimental value.
윤용대(Yoon, Yong-Dae),서수연(Seo, Soo-Yeon),윤승조(Yoon, Seung-Joe),하기주(Ha, Gee-Joo),임춘근(Lim, Choon-Geun) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
The present research carried out modeling of concrete, H-Pile and stud bolts, which are elements composing a composite basement wall, and the structural behavior was analyzed through nonlinear analysis to assess shear performance of the composite basement wall by utilizing ADINA which is a finite element analysis program. At this time, the analysis was carried out using and a span ratio were set as a variable, and the experimental value was compared and analyzed by using analysis data according to it. As a result of analysis, the analysis body setting All Generate Nodes and Contact Tied-Tied showed the result value most similar to the experimental value in the contact surface elements, but an accurate analysis result couldn't be obtained in Contact Tied-Not Tie. Much stress was concentrated on the contact surface elements using Contact Tied-Not Tied, and thus, while the rupture between stud bolts and H-pile occurs, the stress transfer was not smoothly carried out, as a result, it didn't withstand large load and deformation in case of comparing it with other contact surface elements. In an aspect of influence according to the span ration, the bigger the span ratio becomes, the bigger deformation appeared even in less load, and the value similar to the experimental value could be obtained in other contact surface elements in case of comparing with the experimental value.
합성율에 따른 연속 합성지하벽의 휨거동에 관한 실험연구
윤용대 ( Yoon Yong-dae ),김상구 ( Kim Sang-koo ),윤승조 ( Yoon Seung-joe ),서수연 ( Seo Soo-yeon ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
In this research, three continuous composite basement wall specimens are made in order to evaluate the strength of the basement composite wall in the continuous span. An experiment was conducted with the variable of a composite rate depending on the shear connector. Test result showed that as the composite rate increased, the displacement ductility ratio decreased, while there was increase in the strength and initial stiffness.
윤용대(Yoon Yong-Dae),서수연(Seo Soo-Yeon),윤승조(Yoon Seung-Joe),하기주(Ha Gee-Ju) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
When doing underground excavation works for the purpose of constructing large underground structures for a building in the limited space in downtown area, the stability of the adjacent ground must be top priority, and to accomplish this, it is essential to review the retaining wall construction carefully. H-Pile, which has been mainly used as a stress-carrying material in temporary earth-retaining structures, is most likely to be abandoned after completion of the works for the basement exterior wall in relation to contiguous bored piles, so it will result in a waste of material. To improve this situation, Basement Composite Wall Method where H-Pile and basement wall are compounded, has been developed. This method is being used most frequently in many local construction sites. In this study, the researcher manufactured total four specimens in order to evaluate the shear resistance of the basement composite wall. Test was conducted taking the composition rate according to shear connectors as test parameter. And also, comparative analyses between the shear strength of both concrete and H-Pile, which are presented by standard formula at home and abroad, and test data were performed.
전단보강재 형태에 따른 플랫플레이트 슬래브-기둥 내부접합부의 뚫림전단강도 성능 평가
윤승조 ( Yoon Seung-joe ),서수연 ( Seo Soo-yeon ),윤용대 ( Yoon Yong-dae ),이우진 ( Lee Woo-jin ),양충모 ( Yang Chung-mo ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
The research manufactured test objects of four types (I, J, SR, C) of shear reinforcement bar in order to verify punching shear behavior at a connecting part between slab and column at a typical office building: seven-story building that is 4.2m high in the first floor and 3.6m high from second to seventh floor. The research experiments punching shear behavior at slab-column connecting part under static forging load to evaluate the shear performance.
전단보강재 형태에 따른 플랫플레이트 슬래브-기둥 내부접합부의 뚫림전단강도 성능 평가
윤승조(Yoon, Seung-Joe),서수연(Seo, Soo-Yeon),윤용대(Yoon, Yong-Dae),이우진(Lee, Woo-Jin),양충모(Yang, Chung-Mo) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1
The research manufactured test objects of four types (I, J, SR, C) of shear reinforcement bar in order to verify punching shear behavior at a connecting part between slab and column at a typical office building: seven-story building that is 4.2m high in the first floor and 3.6m high from second to seventh floor. The research experiments punching shear behavior at slab-column connecting part under static forging load to evaluate the shear performance.
콘크리트 내에 매립된 헤드철근의 인장거동에 대한 유한요소해석
서수연 ( Seo Soo-yeon ),윤승조 ( Yoon Seung-joe ),하기주 ( Ha Gee-joo ),윤용대 ( Yoon Yong-dae ),권영근 ( Kwon Young-geun ),신금종 ( Shin Geum-jong ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
The objective of this paper is to verify the effect of embedded depth and width of head to the tensile capacity of head reinforcement embedded in concrete. FEM(Finite Element Method) analysis is conducted by using ADINA program (version 8.4) for the embedded reinforcement. Main variables in the analysis are embedded depth and width of head. Analysis result showed that the stiffness and strength depended on the embedded depth of head reinforcement. However, the increment of stiffness and strength were not high even if the width of head increased. On the other hand, flexural deformation occurred at the head when the width of head was increased.