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鄭熺孝,李承烈,朴泳珏,金庚映 慶尙大學校 經營行政大學院 2004 工學硏究院論文集 Vol.20 No.-
Twenty-four section of work in the construction of Highway number 35 between Tongyoung and Jinju has the length of 12.595 Km and the width of 23.4 m. It has been designed by Korea Engineering Consultants Corporation and is constructing by Hanjin Heavy Industries & Construction co., LTD. Extension of highway for Tongyong- Jinju have a planing for connect to Tongyong- Geoje and Daejeon - Geoje - Tongyong- Busan about highway for shape U-Type. As result, Gyeongnam South Sea inland area will do better more develop, both an industrial complex of Geoje and the nation industrial complex of Anjung will handle smoothness for solved the quantity of materials. The Juk-Lim bridge has advantages of small vibration under lived load and simple maintenance management since it is constructing using F.S.M(Full Staging Method). By different the construction work of a fabric concrete analysis for variety of stress, deformation, shearing force, happening of the construction work apply to pre-stress according creep, drying shrinkage, tendon. The Juk-Lim bridge of the upper part(BR-2) repeat construction progress of B/W(Bottom Web) and T/S(Top Slab) for construction work from P10 to P5. The cumulative total for term of works of total construction progress are 266 days, each of the construction progress take effect step of construction to analysis. Specially, selecting P9-P8(B/W) in step of construction will study according to a combination of dead load, erection load, shrinkage secondary.
스트레인 게이지 브리지 종류에 따른 탄성계수의 실험적 연구
鄭熺孝,李承烈,朴泳珏,朴峻熙 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-
Strain gauges are widely used for physical force measurements in mechanical, marine, aircraft and civil engineering as well as the fields of architecture, automobiles, and medical science. Strain is measured to determine the degree and behavior of forces such as stress or load. Strain gauges are easy to use and offer a high degree of accuracy and stability. This paper is shown the accuracy of experimental elastic modulus in the tension test according to the strain gauges connections and bridge circuits which are Quarter Bridge(single active uni-axial gauge), Half Bridge(two active on possion gauge), Full Bridge(four active two possion gauge).
鄭熺孝,安光列,李承烈,朴泳珏 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-
It is necessary at present to adapt the design of bridge structures to transport requirement and the restrictive conditions of environment. City bridges, bridges spanning railway lines and stations, skew crossing of streets and highways, etc., require an irregular arrangement of internal supports. If diaphragms are applied, they are usually skew. It is advantageous to use a box girder as the basic component for a bridge of this kind because the box girder provides a high torsional stiffness, a favorable stresses, and due to the small shear stresses arising due to torsion. This paper deal with the analysis of the function of irregularly situated support and skew diaphragms and with their influence on the resulting state of stress of the box girder. The solution is shown for a box girder under eccentric load and according to the length of skew diaphragms.
鄭熺孝,安光列,李承烈,朴泳珏 경상대학교 생산기술연구소 2002 工學硏究院論文集 Vol.2 No.-
The BEF(Beam on Elastic Foundation) analogy was first noted by Vlasov and then utilized for the distortional analysis of box girders by Wright et al., but it was limited only to prismatic straight box girders. With the development of this study, a more generalized element in a stiffness matrix form was presented. With this element, which is "equivalent" to the BEF(Beam on Elastic Foundation) analogy, more complicated configurations can be resulted. In this study, it compares analysis results using the traditional trigonometric function to solve a BEF(Beam on Elastic Foundation) problem with analysis results using stiffness matrix form to solve a EBEF(Equivalent Beam on Elastic Foundation).
鄭熺孝,安光列,李承烈,朴泳珏,金庚映 경상대학교 생산기술연구소 2003 工學硏究院論文集 Vol.19 No.-
When steel member is processed in filed, we can use cutting and welding. Cutting and welding generated residual stress and residual deformation in steel members. In this study. two cutting method is gas cutting and plasma cutting. Gas cutting method generate high heat temperature than plasma cutting method. It decrease that tensile strength and elastic modulus of test specimen cutting by two method. Gas cutting steel members are generated lower tensile strength and elastic modulus than plasma cutting method steel members. Elastic modulus important structure member. So, suitable cutting method is selected by magnitude degree of structure.