[시니어 컬럼] 새로운 삶의 가치 패러다임에 도전하자

박학길(Park, Hak-Kil) 대한건축학회 2014 建築 Vol.58 No.8

간벌 소경재를 이용한 집성목재 보의 휨 거동특성에 관한 연구

박학길(Park Hak-Kil),한재수(Han Jae-Su),황선우(Hwang Sun-Woo) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.6

The purpose of this study is to examine the bending behavior characteristics for the glued-laminated beam by the small size thinning timber. We have studied on the subject through full size bending test by the static loading, and verified the results analytically to the same models with the energy method. The size of the 4 test specimens is 15cm×30㎝ with 3.6m length. Test results have been well corresponded with the analytical results. Especially, the energy method is remarkably efficient to verify the relationship of the load-large deflection to this test model. The ultimate strength of the bending capacity has been shown over 10.3 t·m for each test specimen, and the maximum deflection is above l/120 (3.0㎝), which is almost twice of a allowable serviceability limit state requirement. Load-deflection curve has been conserved almost elastic state until the strength reached the ultimate strength. These mean that the test samples have a good reliability on the both side of the strength and the serviceability for the purpose of the practicability of the glued-laminated beam which was made of the korean thinning timber with small size diameter.

지속가능한 재생성 경량철골-목재 하이브리드 시스템 주택

박민준(Park Min-Jun),박학길(Park Hak-Kil) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)

Because of the green house gas, the building construction industry is seriously confronted with 1) the economic heigh expense for the fossil fuel exhaustion, 2) the economic pain share for the heigh carbon emission duty, and 3) natural disaster pain from the global warming. Almost 1/3 carbon emission come from the concrete based building industry impose economical obligation on the C emission. After, low carbon international agreement and national policy will require the building construction companies's survival right as follows; - Durable and renewable architectural technology development. - A practical construction method for the natural energy application. - A durable positions from the sustainable green building.

시공단계와 기하 비선형성을 고려한 초고층 구조물 해석

오향옥(Oh Hyang-Ok),박학길(Park Hak-Kil) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.7

On the normal structural analysis method of a high-rise building, loads are assumed simultaneous working independent of the construction process and time. On this account, the actual structural behaviors is different from the calculation results. A considerable calculation errors result from the unconsidered load condition caused by the construction sequence and the stiffness change by concrete's strength variation during curing. If the buildings go to high-rising, the column shortening amount gradually accumulated by means of the effect of construction sequence, and then, a large lateral deformation is induced on the high-rise building, that requires a geometrical non-linear analysis, but normal structural analysis abbreviate it. This paper focus on these points. We analyze 40 multi-story model building considering the geometrical non-linear effect. The results showed that normal analysis unconsidered the effect of shear deformation is over-estimated in exterior column and is under-estimated in interior column compared with staged construction analysis. It means that normal analysis is not devisable to select the elements for design at a practical condition. A softening of tall building structure caused the building to displace horizontally larger than horizontal forces as like wind load. We confirmed that it is essential subject to consider a staged construction and geometry non-linear similarly with actual construction behavior for reducing the analysis error.

보 이음부의 휨 저항성능 향상을 통한 전통 목구조 시스템 개선

송종목(Song Jong-Mok),박학길(Park Hak-Kil) 대한건축학회 2006 大韓建築學會論文集 : 構造系 Vol.22 No.1

전통 목구조 시스템 개선을 위한 주먹장이음의 저항성능 해석

송종목(Song Jong-Mok),박학길(Park Hak-Kil) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.6

This paper predicts structure performance of traditional wooden structure, and it is the one of core research themes for technical generalization. I was going to assure problems in the resistance performance interpretation of similar Traditional Wooden Structures by inspecting a mechanics behavior characteristic of joint connection through confirmation and structure interpretation through a model examination to interpret resistance performance of fist connection. It was 1:1 and 1/2 scale and turned at fist connection of the Traditional Wooden Structure beam, and the study progress experimented on performance and structural analysis did same model and inspected comparison. Even as for the stiffness, geometry set which is highly precise, and face each other which got through comparison inspection by an experiment and the interpretation and basics of properties of matter prices document in a base for connection of the same kind accomplished a design ideally. It is the main aim of the study that what externalization does the interpretation condition when I let you quantify the vague nature and cannot lean on an experiment of the parameter to have an influence on stiffness of traditional wooden structure, and raise name value of the interpretation watched. Therefore, though I looked for the method that I generalized the propriety of interpretation as dynamic performance and could put to practical use, I concentrated an ability. As for the main content that I got through an experiment and a theoretical comparative study, a case of SW42 that there were many contact surfaces most, and a joining coherence island was high was able to confirm a stable thing by stress distribution low most under the equal load. In addition, I appeared to get appropriate clamping force because it was efficient to become the joining length of 1/2 beam width digit.

시공 단계를 고려한 초고층 구조물 모의해석

오향옥(Oh Hyang-Ok),박학길(Park Hak-Kil) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1

On the generalized analysis method of the high-rise structure, loads are assumed simultaneous working independent of the construction process and time. On this account, the actual behaviors of the structure is different from the calculation results. A considerable calculation errors result from the unconsidered load condition caused by the construction sequence and the stiffness change by concrete's strength variation during curing. If the buildings go to the high-rising, the column shortening amount gradually accumulated by means of the effect of construction sequence. On the other hand, a large deformation of the structure is essential on the high-rised building, that requires a geometrical non-linear analysis, but ordinary analysis abbreviate. This paper focus on these points we analyze 40 stories multi-story model building considering an staged construction sequence. The results showed that ordinary analysis unconsidered the effect of shear deformation is over-estimated in exterior column and is under-estimated in interior column compared with staged construction analysis. It means that ordinary analysis is not devisable to select the elements for design at a practical condition. We confirm the importance of staged construction analysis. We confirmed that it is essential subject to consider a staged construction similarly with actual construction behavior for reducing the analysis error.

WF型 矩型斷面의 剪斷變形에 關한 理論的 硏究

朴鶴吉 淸州大學校 1980 論文集 Vol.13 No.1

角形鋼管 Beam-to-Column 接合部 耐力一變形 特性

朴鶴吉 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.1

This paper has been researched in an attempt to estimate strength-behaviour characteristics of Beam-to-column connection between W-beam and rectangular hollow section(RHS) column. Ail yield line thee is applied to estimate yield strength of connection in this study. Stress concentration and strain distribution of the cruiform connections which β ratios of beam flange with to RHS range from 0.5 to 1.0 are analyzed by the analytical method of FEM. FEM gives good estimation for an actural connection stress-strain characteristics, but yiel line theory had some differences between the theory and actural behaviour.

P.C Panel과 H-Beam의 볼트접합에 의한 橫力 抵抗 시스템

朴善大,朴鶴吉 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.2

There are many types of lateral structural resisting systems (framed system, braced system, shear wall system, Tube system, core system, etc), which are basically based on structural subsystem. There are three primary types of 2D or 3D vertical subsystems in buildings (1) Wall subsystems; (2) Vertical Shafts; and (3) Rigid Beam-Column frame. Wall are very rigid subsystem in their plane and may be made up of solid concrete panel, braced timber, steel trusses, and so on. Shafts are stiff 3-D tube structures and are usually made up of four solid or trussed walls for ventilation and services. they can carry vertical loads and serve as excellent horizontal-force resisting elements. they also have some problems, which are space planning inflexibility, disagree between horizontal stiffness center and inertia center, construction problems and soon. Rigid-frame subsystems are very good for space planning flexibility, but vertical resisting stiffness is very small. This study is a structural model analysis for rigid frame with P.C panel to increase lateral stiffness for rigid-frame subsystem. we modeled exterior spandrel beam bolted with P.C panel which is acting as shear wall action. The analysis results showed vertical stiffness increasement. if we apply this method to rigid-frame at inter and exterior wall, we can esealy large increament of the lateral stiffness of the rigid-frame.