본 연구에서는 쌍동형 카페리에 대한 기본 구조 설계 및 구조 해석을 위한 기법을 제시한다. 카페리와 같이 길이 50미터 이상 길이와 폭/ 비가 12보다 큰 중/소형 고속 선박의 강도 해석에 대한 규정이나 방법론은 아직까지 명확하게 제시되지 않고 있다. 따라서 본 논문에서 부재의 스캔 틀링은 한국선급기준을 적용하였고, 설계안에 대한 구조강도 검증을 위해서 카페리 전용선박 기준에 의해 추가적으로 검증하였다. 특히, 카페리 전 용선박 기준을 적용하여, Hull girder ultimate strength를 추가적으로 수행하여, 현재 기준에 의한 설계의 모호성을 극복하도록 제안하였다. 본 연구를 통해 도출된 연구 결과는 앞으로 고속 쌍동형 카페리의 구조설계 및 구조해석에 관련된 기본적인 자료로 유용하게 활용될 것으로 예상된다.

Numerical analysis has been carried out to investigate the structural characteristics of auxiliary shaft system in a compact special vehicle. Stress and deformation distributions with safe factor in the auxiliary axle system are compared. It can be seen that maximum stress happens near the local axle position and deformation at the air spring is also predicted. The results from this study could be applicable for optimal design of variable shaft system in the compact special vehicle.

The objective of this paper is to suggest structural design for the long-life housing apartment complex to save the construction cost. The key is to use unavailable underground space due to bearing walls or bad configuration of columns in apartments as the parking space. Therefore, the structural plan of apartment buildings considering the parking section in the underground should be designed. After analytical resutls of three cases, it is significant effect in saving construction cost.

The result of the previous work leads to the idea that the inner area of the hyperbolic shell generator should be minimized for the cooling tower with higher first natural frequency. In this study the inner area of the hyperbolic shell generator was graphically established under varying height of the throat and angle of the base lintel. From the graph, several shell geometries were selected and analysed in the aspect of the natural frequency. Three representative towers reinforced differently due to different first natural frequencies were analysed non-linearly and evaluated using a damage indicator based on the change of natural frequencies. The results demonstrated that the damage behaviour of the tower reinforced higher due to a lower first natural frequency was not necessarily advantageous than the others

본 연구에서는 간척지에서 플라스틱 온실의 기초안전성을 평가하기 위하여 강재 나선말뚝기초를 갖는 폭 6m 연동하우스 1개동과 강재 나선말뚝기초와 파이프줄기초를 각각 적용한 폭 8.2m 단동하우스 2개동을 SPT N값 이 2인 간척지 시험포장에 설치하여 플라스틱 온실의 인발량 및 침하량을 측정하였다. 또한 플라스틱 온실에 적용된 나선말뚝기초 3종(φ50, φ75 및 φ100)을 인근의 간척지 시험포장에 설치하여 인발저항특성을 시험하였다. 평가 기간 중 플라스틱 온실의 수직변위 움직임이 관측 되었지만 온실의 규모와 비교하여 그 변위는 무시할만한 수준이었다. 평가 기간 중의 최대 수직변위는 나선말뚝 기초를 적용한 연동하우스의 경우 +9.0mm(인발)~- 11.5mm(침하), 나선말뚝기초를 적용한 단동하우스의 경 우 +1.3mm~-7.7mm, 파이프줄기초를 적용한 단동하우스 의 경우 +0.9mm~-11.2mm로 나타났다. 나선말뚝기초의 허용인발력은 모두 극한하중 판정기준에 의해 판단할 수 있었으며 φ50mm, φ75와 φ100 나선말뚝기초의 최종 허용인발력은 각각 0.40kN, 1.0kN과 2.5kN으로 산정할 수 있었다. 평가기간 중 나선말뚝기초를 적용한 플라스틱 온실의 기초안전성을 최종적으로 판단하기에는 다소 무리가 있다고 판단되나 강재 나선말뚝기초를 간척지 플라스틱 온실의 기초로 사용하더라도 큰 문제는 없을 것으로 판단되었다.

PURPOSES: This study is primarily focused on evaluating the effects of the non-linear stress-strain behavior of RAP concrete on structural response characteristics as is applicable to concrete pavement. METHODS : A 3D FE model was developed by incorporating the actual stress-strain behavior of RAP concrete obtained via flexural strength testing as a material property model to evaluate the effects of the non-linear stress-strain behavior to failure on the maximum stresses in the concrete slab and potential performance prediction results. In addition, a typical linear elastic model was employed to analyze the structural responses for comparison purposes. The analytical results from the FE model incorporating the actual stress-strain behavior of RAP concrete were compared to the corresponding results from the linear elastic FE model. RESULTS : The results indicate that the linear elastic model tends to yield higher predicted maximum stresses in the concrete as compared to those obtained via the actual stress-strain model. Consequently, these higher predicted stresses lead to a difference in potential performance of the concrete pavement containing RAP. CONCLUSIONS : Analysis of the concrete pavement containing RAP demonstrated that an appropriate analytical model using the actual stress-strain characteristics should be employed to calculate the structural responses of RAP concrete pavement instead of simply assuming the concrete to be a linear elastic material.

Structural dynamic system involves random variables conditions such as material property, geometric parameters and applied loads. This uncertainties result from the structural parameter are carefully considered the dynamic structural response in displacement, stress, and natural frequencies. The random vibrational system must be designed to withstand a certain amount of the fluctuation with respect to the uncertainties. Harmonic response of a spring-mass system is mathematically modelled with the probabilistic finite element method using the Monte Carlo simulation. The aim of this paper is to find the optimal lowest frequency for the spring-mass system with random input variables and response parameters to the displacements. The probabilistic design is carried out using ANSYS probabilistic design module in a commercial application software and then the optimal design is sequentially solved. An efficient and practical optimal design evaluation method is proposed for the design of the harmonic system. The numerical results are obtained where the next highest frequency of the system and displacements treated as constraints.

The technique of VR and AR utilizing HMD and peripherals was due to launch the products in which the research developers predicting the market magnification satisfy the request of the users in 2016. In the suddenly change game market, because of reflecting global technique and standardization trend, the white paper on Korean games and ICT standardization roadmap published for the development of Korea game industry are important in the decision procedure of the prediction of the game industry and game marketing and technology development and standardization support policy related to the game. In this paper, I analyze the present condition of Korean game industry through published white paper on Korean games and ICT standardization roadmap since 2012 by the year 2016 and suggested the competitiveness strengthening measure of Korean game industry required for the pathfinding of the global game market.

In recent years, single layer latticed domes have attracted many designers and researchers's attention all over the world, because single layer latticed domes as space structure are of great advantage in not only mechanical rationality but also function, fabrication, construction and economic aspect. One of the most important factor, in building of single-layer single-layer lattice spherical dome with 300m span, is to ensure the structural safety. Network pattern of single layer latticed domes can be infinitely taken into account. The typical network patterns are triangle, square, hexagon etc. Especially triangular network pattern has mechanically more advantage than the other network patterns because of having not only a large equivalent shearing rigidity but also a large equivalent bending rigidity and axial rigidity. Among the triangular network pattern, that is, 3 way grid pattern, there are many mechanical differences according to the arranging methods of members. In order to ensure the structural stability of single-layer latticed dome with 3 way grid, designers are required to maintain a constant member length and the member angle. In order to achieve this, it is important to search the member array that the standard deviation of the member lengths and angles is the smallest. This paper is to develop the arrangement of member and to verify its validity for single-layer latticed spherical dome with 300m span.

This paper is a study on the nonlinear behavior of polyhedron curved space roof as building structures of quasicrystal system. The quasicrystal is made up of two kinds of parallel hexahedrons, and all the line elements of the parallelepiped have the same length. The quasicrystal design grid dome has a pentagonal symmetry and all members have the same length. This paper described form of design gird dome, and showed the analysis conditions. Also, The displacement-load curve is shown through the analysis and we grasped the flow of the load and forces through analysis of design grid dome applied quasicrystal system.