항타진동이 인접구조물에 미치는 동적영향 및 대처방안에 대한 연구

서상근,김태원,장병순 부산대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.59 No.-

말뚝항타시 인접구조물에 손상을 주는 진동이 발생하는 것은 잘 알려져 있으며 이러한 진동으로 인한 구조물의 손상으로는 구조물에 생기는 균열 및 지반의 부등침하 등이 있다. 본 논문에서는 탄성이론에 근거하여 이동하는 파에 대한 성질을 정리하고 구조적으로 손상을 가하는 진동과 이러한 손상을 예방할 수 있는 방안을 제시하였다. 또한 현장에서 항타말뚝에 의한 진동을 측정하고 실측치와 본 논문에서 소개한 이론식에 의한 이론치와 비교하고 실제의 진동치로 구조물의 동적변형을 계산하였다. 마지막으로 항타진동에 대한 손상을 예방할 수 있는 대처방안에 대해 논의하였다. It is well known that the vibration of ground which damaged adjacent structures occurs in pile installation. This vibration problem mainly creates structure crack and ground settlement. In this paper, the nature of traveling waves is deduced from the theory of elasticity, structurally damaging vibrations and vibration limit preventing this damage are introduced. Also, through driven-pile test in the field. velocity of ground is measured and compared with values calculated from equation relating pile driving energy to the distance from source to a target structure. Finally managing vibration problem is suggested.

에너지법을 이용한 2경간 연속곡선보의 해석

서상근,김은수,장병순 부산대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.59 No.-

최근 고속도로 교량이나 입체교차로등에 평면곡선보의 사용이 증가하고 있다. 구조적인 복잡함 때문에 곡선교는 휨응력 뿐만아니라 비틀림응력까지 받게 된다. 통상적으로, 곡선교는 휨비틂이론으로 해석되는데 곡선교의 해석에는 ��綢늣염倖�무시한 보이론과 ��綢늣염倖�고려한 보이론이 있다. 본 논문에서는 ��綢늣염倖�고려한 휨비틈이론에 기초를 두고 단순지지 곡선보의 단면력과 변위를 결정하고 에너지법을 사용하여 2경간 연속 곡선보에 대한 탄성방정식을 유도하였다. 또한 실하중을 받고 있는 2경간 연속 곡선보의 단면력과 변위를 구하였다. The use of horizontally curved girder bridge has increased considerably for highway bridge and interchanges. Due to the geometric complexities, curved girder are subjected to not only flexural stresses but also significant torsional stresses. Usually, a curved girder is analyzed by the flexural torsional theory. There are several theories which are available for the analysis for the curved girders ; beam theory ignoring the warping-torsional effects and beam theory considering the warping torsional effects. In this paper, the stress resultants and displacements of simply supported curved girder based on the flexural torsional theory considering torsional warping effects are determined. And elastic equations of two-span continuous curved girder are obtained by using energy method. Also, bending moment diagram, warping moment diagram, torsional moment diagram, shearing force diagram, and deflection diagram of two-span continuous curved girder bridge applying vertical loads and uniform loads are presented.

단기간 기간내 삽관후 음성지표의 변화

남순열,봉성근,서영일,유화경,유승주 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.10

有限要素法에 의한 슬래브를 가지는 3次元 骨造構造物의 靜·動的 解析에 관한 硏究

서상근,허택영,장병순 釜山大學校生産技術硏究所 1995 生産技術硏究所論文集 Vol.49 No.-

슬래브를 가지는 3차원 골조구조물에 진동을 유발하는 기계하중이 재하되면, 동적 거동을 고려하여 구조물을 설계할 필요가 있다. 구조물의 정.동적 해석에서 보다 정확한 해를 얻기위해 기하학적 형상, 재료특성, 경계조건 및 하중조건 등을 실제 구조물에 근접하도록 이상화시켜야 한다. 본 연구에서는 구조물 해석에 유한요소법을 사용하였으며, 본 연구의 목적은 동적 하중을 받는 건축구조물에 대한 동적 운동방정식의 정식화 및 구조물 해석에 적용할 수 있는 프로그램의 개발이며 이 프로그램으로 슬래브 임의 위치에서 진동하는 기계가 재하될 때 구조물의 동적 거동을 해석하는 것이다. When dynamic force such as mechanical load which create vibration is applied to the three-dimensional framed structure with slab, dynamic analysis is an essential part of the design work. In order to obtain the accurate result of either static or dynamic analysis, idealization of geometrical shape, material properties, boundary conditions and loading conditions have to be as close to the actuality. The aim of this study is formulation of the equation for dynamic motion and development of finite element program which can be accommodated to analysis of dynamic behavior of building structures.

비정규직 고용환경에서 학습상담사들의 경험에 대한 합의적 질적 연구(CQR)

서민영(Seo Min-Young),이충효(Lee Chung-hyo),황근순(Hwang Geun-Soon) 한국교육심리학회 2018 학교심리와 학습컨설팅 Vol.5 No.1

지반-3차원 골조구조물 상호작용계의 동적 해석

장병순,서상근 釜山大學校生産技術硏究所` 1998 生産技術硏究所論文集 Vol.54 No.-

지반상에 존재하는 3차원 골조구조물에 진동을 유발시키는 기계하중, 풍하중, 지진과 같은 동적 하중이 작용한다면, 동적 거동을 고려하여 구조물을 해석해야 할 뿐만 아니라, 지반의 동적 거동도 고려하여야 한다. 따라서, 본 연구에서는 3차원 구조물 모델로 정식화된 유한요소법을 사용하여 지반-3차원 골조구조물 상호작용계의 동적 거동을 해석하고자 한다. 실제 구조물에 근접한 기하학적 형상으로 이상화시키기 위해, 지반-구조물 상호작용계를 판은 유연성을 갖는 4-절점 판요소, 보·기둥은 2-절점 보요소, 탄성지반은 8-절점 입체요소로 분할하였다. 본 연구의 목적은 지반-3차원 골조구조물 상호작용계의 동적 거동을 해석하기 위해, 동적 운동 방정식을 정리한 후 유한요소 프로그램으로 상호작용계의 동적 거동을 해석하는 것이다. When a dynamic loads such as a mechanical load, a wind load, and a seismic load causing a vibration, act on the body of the 3-D framework resting on soil foundation, it is required to consider the dynamic behavior of the soil foundation as well as that of the 3-D structure in the structural analysis. Thus, this study presents the analysis for the dynamic behavior of soil-space framework interaction system obtained from the finite element method which is formulated by modelling the 3-D structure. Since an actual structure is idealized as the geometric shape, the plate, the beam-column, and the soil foundation will be subdivided into 4-node plate elements with flexibility, 2-node beam elements, and 8-node brick elements respectively. The aim of this study is analysis of dynamic behavior of soil-space framework interaction system by finite element program.

變斷面 I-型 曲線格子桁橋의 影響線에 관한 硏究

장병순,서상근,윤정섭 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-

변단면 I-형 곡선격자교의 최대부재력을 해석하기 위해 본연구에서는 Vlasov의 기초미분방정식을 이용하고 이를 유한차분법을 이용하여 변단면의 휨모멘트, 전단력, 순수비틂모멘트, ��綢낯霽璇� 바이모멘트의 영향선을 구하여 제시하였고 이를 이용해 최대부재력이 생기는 점에서의 단위하중의 작용위치를 구하였다. 실제 교량해석에 있어 본논문의 결과를 이용하면 부재의 부재력을 쉽게 구할수 있을 것이다. The general behavior of curved girder considering the warping effects is formulated by series of differential equations postulated by Vlasov. In order to deternine the maximum bending moment, the maximum shear force, the maximum pure torsion, the maximum warping torsion, and the maximum bimoment for the curved girder grid bridges, it is important ot find the location of live load applied to the curved girder grid bridges. The fundamental differential equation concerning the behaviour with warping effects for the curved girder is developed by Vlasov. Also, shear force, bending moment, pure torsion, warping torsion, and bimoment for curved I-girder bridge are analyzed by the finite difference method. In this paper, the influence line of shear force, bending moment, pure torsion, warping torsion, and bimoment due to unit vertical load and unit torsional moment for curved I-girder grid bridges with variable cross section are obtained by using the finite difference method and compared with respectively.

Aroma Components of Traditional Korean Soy Sauce and Soybean Paste Fermented with the Same Meju

( Jae Soon Seo ),( Ho Geun Chang ),( Won Dae Ji ),( Eun Ju Lee ),( Myeong Rak Choi ),( Haeng Ja Kim ),( Jong Kyu Kim ) 한국미생물생명공학회 1996 Journal of microbiology and biotechnology Vol.6 No.4

Proteomic Analysis of the Anti-Cancer Effect of 20<i>S</i>-Ginsenoside Rg₃ in Human Colon Cancer Cell Lines

LEE, Seo Young,KIM, Geun Tae,ROH, Si Hun,SONG, Jin-Su,KIM, Hie-Joon,HONG, Soon-Sun,KWON, Sung Won,PARK, Jeong Hill Japan Society for Bioscience, Biotechnology, and A 2009 Bioscience, Biotechnology, and Biochemistry Vol.73 No.4

<P>Ginseng is a well known herbal medicine in Asia, and ginsenoside Rg<SUB>3</SUB> has anti-cancer and various pharmacological effects. In particular, 20<I>S</I>-ginsenoside Rg<SUB>3</SUB> may increase the anti-proliferative effects of chemotherapy. The authors investigated the mechanism of the anti-proliferative effect of 20<I>S</I>-Rg<SUB>3</SUB> at the protein level in HT29 colon cancer cells. MTT, caspase-3 assays, and flow cytometry analysis were performed to determine cytotoxicity and apoptosis, and proteomic analysis was performed by two-dimensional gel electrophoresis and MALDI-TOF/TOF MS, and a database was used to identify protein changes in 20<I>S</I>-Rg<SUB>3</SUB> treated HT29 cells. The proteins identified included down-regulated Rho GDP dissociation inhibitor, up-regulated tropomyosin1, and annexin5 and glutathione s-transferase p1, which are apoptosis associated proteins. The anti-proliferative mechanism of 20<I>S</I>-Rg<SUB>3</SUB> was found to be involved in mitotic inhibition, DNA replication, and repair and growth factor signaling. The findings of this study suggest that the cytotoxicity of 20<I>S</I>-Rg<SUB>3</SUB> in colon cancer is dependent on several mechanisms, including apoptosis.</P>

Proteome changes related to the anti-cancer activity of HT29 cells by the treatment of ginsenoside Rd.

Lee, Seo Young,Kim, Geun Tae,Roh, Si Hun,Song, Jin-Su,Kim, Hie-Joon,Hong, Soon-Sun,Kwon, Sung Won,Park, Jeong Hill Govi-Verlag Pharmazeutischer Verlag [etc.] ; Verla 2009 PHARMAZIE Vol.64 No.4

<P>Ginseng is a representative herbal medicine in Asia and various pharmacological activities of ginsenoside Rd isolated from ginseng have been reported. However, anti-cancer activity and mechanism of ginsenoside Rd in HT29 colon cancer cell lines were not studied yet. We performed proteomic analysis through two-dimensional gel electrophoresis, MALDI-TOF/TOF-MS and database to identify altered protein induced by ginsenoside Rd treatment in HT29. We can identify fourteen proteins contributed to cell growth inhibition induced by Rd. Proteins involved in the inhibition of mitosis (Stathmin1, Microtubule-associated protein RP/EB family and Stratifin) were significantly up- and down-regulated. And proteins associated with apoptosis (Rho GDP dissociation inhibitor, Tropomyosin1 and Annexin5) were significantly changed. Furthermore, ginsenoside Rd in HT29 was involved in cytoprotection, DNA replication and repair, protein synthesis and degradation, metastasis and mutagenesis. It was supposed that ginsenoside Rd contributed to induce anti-cancer activity by complementary functions of these proteins in colon cancer cells.</P>