As fires have frequently occurred with large scale at cultural assets and warehouses, the development of Korean type demolition fire apparatus for efficient fire fighting becomes important. In this study, structural stability is investigated for assembly model of boom and outrigger by using computational structural analysis. Analysis results of boom and outrigger unit are also compared with assembly model. As this study result, equivalent stress result of boom unit is about 6% higher than assembly model and equivalent stress result of outrigger unit is about 15% higher than assembly model.

회전하는 수조에서 나타나는 순압성 소용돌이의 패턴과 구조 회전에 대한 연구를 수행하였다. 소용돌이는 수면 위에 접촉된 원판을 수조에 대해 상대적으로 회전시키는 방법을 통해 만들어졌다. 회전원판의 크기, 회전방향, 회전속력에 따라 트라이폴라 소용돌이, 삼각형 소용돌이, 사각형 소용돌이, 커다란 원형 소용돌이가 안정하게 나타났고, 모양이 계속 변하는 불안정한 소용돌이도 나타났다. 회전원판과 수조 벽 사이의 간격이 안정한 소용돌이의 패턴에 큰 영향을 주었고 불안정한 소용돌이는 원판이 시계방향으로 빠르게 회전할 때 주로 나타났는데, 그 원인은 원심력적 불안정성이었다. 한편, 트라이폴라 소용돌이에서 나타난 전체 패턴의 구조적 회전 각속도는 원판 가장자리의 선속도에 비례하였고, 고기압성 트라이폴라 소용돌이가 저기압성 보다 더 큰 구조 회전 각속도를 가졌다. 로스비 수와 구조회전의 관점에서 볼 때, 해양에서 발견된 트라이폴라 소용돌이와 본 실험에서 나타난 트라이폴라 소용돌이는 유사하였다.

This project is mainly related to evaluation of total energy consumption of low energy house, the exterior envelope of which was wholly composed of structural insulated panels(SIP). The U-value of applied SIP was in the range of 0.189 to 0.269W/㎡․K and the U-value of pair glass from 0.78 to 1.298W/㎡․K was applied for window dependent to its function respectively. For comparison of total energy performance, the energy simulation for pilot house was performed to compare with the control house having insulation criteria of Korean building regulation in 2009. Based on simulation of dynamic energy performance, the pilot house saved 48.3% of annual energy consumption while the control house in 2009 consumed as 85.7GJ/y. In case of heating, the result showed that the energy saving ratio amounted to 76.7%. For CO₂ emission, the pilot house diminished approximately 35.4% from 6,208.4kgCO₂ to 4,009.2kgCO₂. In payback period to early investment, it was analyzed the pilot house took 7.8 years, when the low energy house built by other insulation method with same thermal perfusion took 11.5 years. From this result, it is considered that the SIP is more effective, economic to Green Home application.

The demand for the structural system of reduction in story height increases because buildings are getting higher. The existing method of construction is not efficiency. Thus, it is hard to reduce the story height and this method cannot secure economics as expected. This study aims at developing the partially concrete-filled new type composite beam, which can efficiently resist against the negative moment and positive moment, for the reduction of deflection. Through case studies on loading of concentrated load and uniformly distributed load to fixed beam, we could find the most efficient ratio of moment of inertia. Consequently the gap space between middle and end beam can be used as facilities installation, moreover the suggested Omega beam system is expected to get the effect of reduction in story height as well as reduction of quantity.

휨 거동 및 전단부의 전단거동으로 인한 철근상세 및 사용되어지는 철근의 과다로 인하여 취성파괴의 양상이 발생 하고 있다. 이에 본 실험에서는 유리섬유망을 이용하여 철근과의 휨 및 변위 거동을 통하여 무보강철근과 유리섬유망의 ply 수에 따른 휨거동 실험을 통하여 균열을 살펴보고서 향후 휨 거동에 적정한 유리섬유망의 철근의 배치겹수에 대한 사용량을 검토하고자 한다.

본 연구는 과수재배 시설의 표준화 및 환경조절기술개발을 위한 기초자료로 제공하는 것을 목적으로 과수재배용 온실의 실태를 조사하여 구조유형과 설계요소를 분석하고, 기상재해에 대한 안전성과 구조 및 환경관리에 대한 개선방안을 검토하였다. 시설재배 면적이 가장 많은 5개 품목 중 주로 제주도에서 재배되고 있는 감귤과 현재 재배온실을 찾을 수 없는 단감을 제외한 포도, 배 및 복숭아재배 온실을 연구대상으로 하였다. 감귤과 포도재배 온실은 꾸준히 증가하고 있으나 저장시설의 발달로 배와 단감재배 온실은 감소하고 있는 추세이다. 앞으로는 비가림 효과가 크고 저장성이 떨어지는 품목을 중심으로 과수재배 온실의 변화가 예상된다. 조사대상 온실 중 배 재배 온실과 복숭아재배 대형 단동온실을 제외하고는 대체로 보급형 온실의 규격을 따르고 있으며, 재배작목별로 특성화된 온실은 없는 것으로 나타났다. 과수재배 온실의 대부분은 농촌진흥청과 농림수산식품부에서 고시한 농가보급형 모델이나 내재해형 모델의 부재규격을 따르고 있었다. 기초는 대부분 콘크리트 기초를 사용하고 있었으며, 배 재배 온실의 경우에는 내재해형 모델보다 두꺼운 단면의 기둥을 사용하고, 강판을 기둥의 하단에 용접하여 매설한 형태의 특수한 기초를 적용하고 있었다. 조사대상 온실의 구조적 안전성을 검토한 결과 대부분 안전하였으나 김천과 천안의 포도재배 온실, 남원과 천안의 복숭아재배 온실에서 적설에 불안전한 것으로 나타났고, 남원의 복숭아재배 온실은 풍속에 대한 안전성도 부족한 것으로 나타났다. 또한 채소재배 온실을 복숭아재배로 전용한 온실의 경우 적설과 풍하중 모두 상당히 불안정한 것으로 나타났다. 과수의 수형, 수고 및 재식간격을 고려하여 과수 재배 온실의 적정규격을 검토한 결과 포도재배 온실은 폭 7.0~8.0m, 측고 2.5~2.8m가 적당하고, 배와 복숭아재배 온실은 폭 6.0~7.0m, 측고 3.0~3.3m 정도가 적당한 것으로 판단된다.

Structural insulated panels, structurally performed panels consisting of a plastic insulation bonded between two structural panel facings, are one of emerging products with a viewpoint of its energy and construction efficiencies. These components are applicable to fabricated wood structures. In Korea, there are few technical documents regulated structural performance and engineering criteria in domestic market. This study was conducted to identify fundamental performance of both monotonic load and quasi static cyclic load for SIPs in shear wall application. Static test results showed that maximum load was 44.3kN, allowable shear load was 6.1kN/m, shear stiffness was 1.23 M N/m, and ductility ratio was 3.6. Cyclic test was conducted by two kinds of specimens : single panel and double panels. Cyclic test results, which were equivalent to static test results, showed that maximum load was 45.42kN, allowable shear load was 6.3kN/m. Furthermore the accumulated energy dissipation capability for double panels was as 2.3 times as that for single panel. From performance of structural tests, it was recommended that the allowable shear load for panels was at least 6.1kN/m.

This study aims to analyze the structural behavior on TDCB models bonded adhesively with aluminum foam composite. These simulation models are designed on the basis of British industrial and ISO standards. The variable of configuration factor(m) is set up to investigate the fracture toughness of bonded joint due to the volume of material. Equivalent stress, deformation energy, pressure at bonded part, reaction force-crack length, energy release rate-crack length are obtained by this analysis. Through the data of this study, the fracture behavior can be analyzed by applying the practical composite structure bonded with aluminum foam and the mechanical property can be understood.

부유구조물은 해양에서 다양한 외력을 경험하게 되며 특히, 파랑하중은 구조물의 설계에 결정적인 지배인자로 간주되고 있다. 이런 구조물은 파장과 크기의 상대적 관계로 소형구조물, 대형구조물 등으로 구분될 수 있으며 전통적으로 소형구조물은 회절발생이 없는 것으로 가정하며 대형구조물은 회절 작용에 따른 관성력만을 고려하여 파랑하중을 산출한다. 따라서 이 연구에서는 해양과 강, 호수 등에서 주로 사용되고 있는 정사각형 부유구조물을 이용하여 동유체력과 구조응답의 상관관계를 파악하여 장방형 부유구조물의 안전성에 대한 영향을 검토하였다.

The concrete-filled tube (CFT) column has the excellent structural performance. But it is difficult to connect with column and beam because of closed section. Its Solution, 2 members of ㄷchennel in which Internal diaphragm is installed were welded beforehand and the method of making Rectangular Steel Tube was proposed. According to upside and downside junction shape, Internal diaphragm suggested as symmetric specimen and asymmetric specimen. The upper and lower diaphragm of the Symmetric specimen used the same horizontal and The upper diaphragm of the Asymmetric specimen used the horizontal plate and the lower diaphragm used the vertically plate. In this research, 4 T-shape column to beam steps connections were tested with cyclic loading experiment in order to evaluate the structural capability of the offered connection. Symmetric specimens be a failure in 0.03rad from beam flange. And Asymmetric specimens be a failure in 0.05rad from column interface. The comparison results of All specimens shown similar to energy absorption capacity in 0.02rad.

This paper presents experimental studies aiming at evaluation of structural behaviors of RC (Reinforced Concrete) beams externally strengthened with taper ended CFRPs(Carbon Fiber Reinforced Polymers). Experiments are performed with RC beams having different numbers of CFRP layers and length of each layer. The beams are subjected to four point-bending with simply supported condition. Test results of taper ended CFRPs and non-tapered CFRPs are compared and the better strengthening effect is observed from tapered ended CFRPs.

The construction of a moment connection for a rectangular hollow section (RHS) column and a H-shaped beam is difficult because the RHS is a closed section. When a inner diaphragm is used for such a connection, in general, it is installed after cutting the HSS columns, which results in increased construction work. This paper suggests a new fabrication method to overcome such problems: An inner diaphragm is welded to inside a C-shaped section first, and then a column is fabricated by welding two C-shaped sections. This fabrication method is superior to a classic method in terms of constructibility. An experimental and a numerical study using Ansys 9.0 were performed in order to compare the strength of connections with respect to the presence of concrete, the corner shape of diaphragm, and the axis of loading. The experimental results including initial stiffness and ultimate loads are reported and the analytical results including load transfer mechanism, degree of stress concentration, and strain distribution are also reported.

In this study, the structural analysis for bellows joint of high-performance that can enhance the performance of seismic isolation piping was performed. Bellows joint is that the corrugated flexible piping is connected at the both sides of elbow. An one axis of the bellows joint fixed, and the other end of the axis changes the position from 0° to 315° for the radius displacement of 500 mm. Results obtained are as follows for this case in analysing of the maximum stress and plastic strain of the bellows joint. As the location of the base isolation displacement get farther from the fixed pipe, the bellows joint is pulled, and the maximum stress and plastic deformation is increased. And so the maximum stress occurs near the bellows at both ends of the elbow. Displacement in the 135° position, a maximum stress of 837 MPa and a plastic strain of 3.00% was the highest.

PURPOSES : Traffic accidents at intersections have been increased annually so that it is required to examine the causations to reduce the accidents. However, the current existing accident models were developed mainly with non-linear regression models such as Poisson methods. These non-linear regression methods lack to reveal complicated causations for traffic accidents, though they are right choices to study randomness and non-linearity of accidents. Therefore, to reveal the complicated causations of traffic accidents, this study used structural equation methods(SEM). METHODS : SEM used in this study is a statistical technique for estimating causal relations using a combination of statistical data and qualitative causal assumptions. SEM allow exploratory modeling, meaning they are suited to theory development. The method is tested against the obtained measurement data to determine how well the model fits the data. Among the strengths of SEM is the ability to construct latent variables: variables which are not measured directly, but are estimated in the model from several measured variables. This allows the modeler to explicitly capture the unreliability of measurement in the model, which allows the structural relations between latent variables to be accurately estimated. RESULTS : The study results showed that causal factors could be grouped into 3. Factor 1 includes traffic variables, and Factor 2 contains turning traffic variables. Factor 3 consists of other road element variables such as speed limits or signal cycles. CONCLUSIONS : Non-linear regression models can be used to develop accident predictions models. However, they lack to estimate causal factors, because they select only few significant variables to raise the accuracy of the model performance. Compared to the regressions, SEM has merits to estimate causal factors affecting accidents, because it allows the structural relations between latent variables. Therefore, this study used SEM to estimate causal factors affecting accident at urban signalized intersections.

The purpose of this study was to analyze the effects of quality factors on value, satisfaction and loyalty in a wine training program. The results of this study can be summarized as follows: Structural verification of the wine training program loyalty model showed that the quality of the wine training program positively affected both value (p<0.001) and satisfaction (p<0.001). Further, the value of the wine training program positively affected satisfaction (p<0.01), which in turn positively influenced loyalty (p<0.001). The quality of the wine training program was presented as solicitude for students, textbook and curriculum, qualification and confidence of lecturer and staff, and training quality, whereas the value of the program was composed of sense of belonging, promotion of self-esteem, good impression on others, and improvement of social status. Therefore, the wine training institute's intensive management of the quality and value of the program could induce students' loyalty by enhancing satisfaction for the wine training program.

본 리뷰의 목적은 벼 종자 저장단백질 구조분석 및 발현특성분석 결과 종합화를 통하여 종자형질 개선 등의 실용화연구를 위한 기반구축을 모색하는데 있다. 최근 벼 염색체염기서열완전해독 연구 결과를 이용한 유용형질 유전자 분리 및 실용화 연구가 많이 진행되고 있다. 특히 벼 종자 저장단백질은 인류에게는 주요 영양원으로 사용되어지며 종자 발아시에는 식물체 성장을 위한 질소원으로 사용되어진다. 벼 종자 저장단백질의 분류는 용매에서의 용해도에 따라 약산성 및 알카리 용해성의 glutelin, 알코올 용해성의 prolamin, 염 용해성의 globulin으로 나눈다. 벼 염색체 상에는 11개의 glutelin 유전자와 33개의 prolamin 유전자가 존재하며 prolamin 유전자의 경우 5번 염색체 15 Mb 부위에 15개의 유전자가 위치하였다. 이와 같이 종자저장단백질 유전자들이 동일 염색체 부위에 위치하고 있는 것은 진화학적으로 동일 염색체에서 유래하였거나 유사한 유전자발현 조절영역을 가지고 있음을 의미한다. Globulin 유전자는 5번 염색체에 단일 유전자로 존재하였다. 마이크로어레이를 이용한 종자저장 단백질 관련 유전자의 조직 특이 발현 양상을 분석한 결과 glutelin과 대다수의 prolamin 합성 유전자는 종자배유에서만 발현을 하였으며 소수의 prolamin과 globulin 합성 유전자는 종자배유와 발아종자에서도 발현을 나타내었다. 종자 저장단백질의 프로모터부위를 분리한 후 종자에서의 발현 양상을 분석한 결과 glutelin type C1 프로모터가 종자의 전체 부위에서 발현을 나타내었으며 glutelin type B5와 α-globulin 프로모터가 많은 양의 발현을 나타내었다. 본 리뷰를 통하여 벼 종자 저장단백질의 구조및 발현특성 연구 진행사항을 살펴보았다. 이러한 연구 동향분석은 종자형질 개선 및 물질생산 등의 실용화 연구를 수행하는 연구자들에게 최근의 연구 현황을 제공할 수 있을 것으로 생각된다.