• 한국생산제조학회지
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• 제21권5호
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• pp.830-835
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• 2012

A research for application of LDSMC(Low Density Sheet Molding Compound) composite is in progress for lightening the weight. This paper has performed fatigue test and simulation of external panel for Korean commercial vehicle. Before the fatigue test, static test was carried out. From the test, the structural safety was investigated using Goodman diagram. After the static test performance, the fatigue test was conducted at a range of load frequency 5Hz, a stress ratio(R) of 0.05 and an endurance limit of $10^6$ to obtain the S-N curve. The S-N curve is applied to the fatigue analysis of the external panel assembly. The result of FEM analysis was in accord with the experimental result within 83% confidence. It showed that the process to set up the safety range of allowable error is required in process of the design and simulation verification.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2003년도 가을 학술발표회 논문집
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• pp.569-576
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• 2003

Fundamental issues in static finite element analysis of reinforced concrete panel subjected to biaxial tensile loads are discussed. This paper is trying to bring our attention to the appropriate use of concrete material models such as cracking criteria, tension stiffening model and the steel models which are basically used in the nonlinear finite element analysis of reinforced concrete panels. We mainly investigate the sensitivity of available material models and finite element technologies to the finite element analysis result using our recent reinforced concrete panel experiment result. Throughout this study, we found that the judicious use of the material models and finite element technologies with the sound understanding of structural characteristics can only guarantee the accurate prediction of panel behaviour.

• Structural Engineering and Mechanics
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• 제25권4호
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• pp.365-382
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• 2007

A pilot study has been conducted to guide the development of a finite element modeling formulation for the analysis of architectural glass curtain walls under in-plane lateral load simulating earthquake effects. This pilot study is one aspect of ongoing efforts to develop a general prediction model for glass cracking and glass fallout for architectural glass storefront and curtain wall systems during seismic loading. For this study, the ANSYS finite element analysis program was used to develop a model and obtain the stress distribution within an architectural glass panel after presumed seismic movements cause glass-to-frame contact. The analysis was limited to static loading of a dry-glazed glass curtain wall panel. A mock-up of the glass curtain wall considered in the analysis with strain gages mounted at select locations on the glass and the aluminum framing was subjected to static loading. A comparison is made between the finite element analysis predicted strain and the experimentally measured strain at each strain gage location.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 추계학술대회 논문집
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• pp.955-956
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• 2012

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2013년도 춘계학술대회 논문집
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• pp.1209-1210
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• 2013

• 한국철도학회논문집
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• 제3권2호
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• pp.43-50
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• 2000

The corrugated panels are the prime candidate structure for the floor, roof and wall of Korean high speed train. The equivalent continuum modeling approach panels can be used for the efficient design and evaluation of their structural characteristics. The equivalent continuum models, derived from the true complex corrugated panels, should have the same structural behavior as the original structures have. This paper briefly reviews three representative continuum modeling methods: the static analysis method and two plate-models based on modal analysis methods (MAM). These methods are evaluated through some numerical examples by comparing the natural frequencies and static deflections. It is observed that the plate-model based on Rayleigh-Ritz method seems to provide the best results when used in conjunction with the cantilever-type boundary conditions. The equivalent elastic constants of various corrugated panels, depending on the changes in their configurations, are tabulated for efficient use in structural design.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2000년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall 2000
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• pp.233-238
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• 2000

The purpose of this study is to outline the analysis procedure for evaluating the performance of moment resisting steel frames. For this purpose, three ordinary moment resisting frames are designed in compliance to UBC 1994. The evaluation is performed by nonlinear static procedures using two analytical models. Only one analytical model using panel element can reflect the panel zone deformation explicitly. The limit values in FEMA 273 are used as guidelines of predicted demand parameters by which the performance of OMRFs may be assessed.

• 한국구조물진단유지관리공학회 논문집
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• 제23권3호
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• pp.75-82
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• 2019

아스팔트 콘크리트(AC) 궤도는 열차 하중에 의한 궤도 하부노반의 발생응력을 최소화하고, 적외선에 민감한 AC의 노출면적을 감소시켜 온도 영향에 따른 AC 도상의 소성변형을 줄일 수 있는 슬래브 패널 개발이 매우 중요하다. 본 연구에서는 형상 설계 및 실내성능시험을 통해 AC 궤도용 슬래브 패널을 개발하였으며, KRL-2012 표준열차하중 모델 및 KR-C코드에 의한 다양한 정적 하중조합에 따른 슬래브 패널에 작용하는 휨 인장응력 및 설계모멘트를 유한요소해석을 통해 구조 안전성을 검토하였다. 또한 AC 궤도용 슬래브 패널의 설계 적합성을 검증하기 위하여, EN 13230-2에 의거 슬래브 패널 주요 위치별로 정적 휨 강도 시험, 동적 휨 강도 시험을 수행하였다. 성능 시험 결과, AC 궤도용 슬래브 패널은 균열 하중 및 균열 확대 여부 등 유럽 표준에서 요구되는 성능 기준을 모두 만족하였다.

• 한국전산구조공학회논문집
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• 제25권1호
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• pp.19-26
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• 2012

본 논문에서는 강판벽이 설치된 골조 구조물의 연쇄붕괴 거동을 비선형 정적 pushdown 해석을 이용하여 평가하였다. 해석모델은 중력하중에 대해서 설계된 2층 2경간 철골구조물이며, 중앙 기둥을 제거하고 하중을 서서히 증가시키며 하중-변위 관계를 구하였다. 구조물의 전체적인 거동뿐만 아니라 부분적인 응력과 변형을 파악하기 위하여 ABAQUS를 이용한 유한요소해석을 수행하였다. 해석을 통해서 구조물의 경간 길이 및 설치된 강판의 두께의 변화에 따른 연쇄붕괴 거동을 평가하였으며, 샛기둥을 이용하여 강판을 분할하고 분할된 강판의 위치에 따른 연쇄붕괴 성능의 변화를 관찰하였다. 해석결과에 따르면 경간의 길이가 증가할수록 연쇄붕괴를 방지하기 위하여 요구되는 강판의 두께 또한 증가하며, 분할된 강판의 수가 증가할수록 연쇄붕괴에 대한 저항성능이 약간 증가하지만 그 영향은 그리 크지 않은 것으로 나타났다. 또한 개구부로 인하여 일부 경간에만 강판이 설치된 경우에도 연쇄붕괴 저항성능이 어느 정도 증가하는 것으로 나타났다.

• East Asian Economic Review
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• 제20권2호
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• pp.229-275
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• 2016

We study the effect of the high-skilled emigration rate on the growth rate of the source countries. We incorporate the foreign direct investment and the policy variables into the panel model and also their interactions with the high-skilled emigration rate, as they are related to the network externality that may be created by the high-skilled emigrants working abroad. We apply the static fixed-effects model and compare it with the results obtained in the dynamic panel model with system generalized methods of moments estimators. We find the negative effect of the high-skilled emigration rate by itself and in its interaction with the foreign direct investment only in the dynamic model. However, we find positive coefficient for the interaction of the high-skilled emigration rate and the civil liberties index, which holds across the static and dynamic specifications. This implies that the effect of the high-skilled emigration rate on the growth rate of the source countries can be positive, and the extent is larger for countries with 'poor' civil liberties. The developing countries with low levels of foreign direct investment inflows and 'poor' civil liberties can best benefit from the high levels of skilled emigration outward. Through finding significant interactions with other variables, we confirm that the high-skilled emigration should be considered along with other related variables in measuring its impact on growth. The implications offer suggestions for the international trade and aid policies.