• Earthquakes and Structures
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• 제19권5호
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• pp.315-329
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• 2020

Through bolt connections in Concrete Filled Steel Tubes (CFSTs) has been proved to be good in terms of seismic performance and constructability. Stiffened extended end plate connection with full through type bolt helps to avoid field weld altogether, and hence to improve the quality of joints. An experimental study was conducted on the hysteretic performance of square interior beam-column connections using flat extended end plates with through bolt. The study focuses on the effect of the bond between the tie rod and the core concrete on the cyclic performance of the joint. The study also quantifies how much the interior joint is getting strengthened due to the confinement effect induced by bi-directional bolting, which is widely used in 3D moment resisting frames. For a better understanding of the mechanism and for the prediction of shear capacity of the panel zone, a mathematical model was generated. The various parameters included in the model are the influence of axial load, amount of prestress induced by bolt tightening, anchorage, and the concrete strut action. The study investigates the strength, stiffness, ductility, and energy dissipation characteristics. The results indicate that the seismic resistance is at par with American Institute of Steel Construction (AISC) seismic recommendations. The bidirectional bolting and bond effect have got remarkable influence on the performance of joints.

• 한국세라믹학회지
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• 제23권2호
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• pp.55-63
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• 1986

In variuos physcial and chemical cause of damage of refractories for steel makin the clarification of the wear mechanism of brick is situated on important factor. In the present paper the wear mechanism of high alumina brick for the arc-furnace roof were inves-tigated by means of XRD, EPMA. SEM and microscopy. The results obtained were summerized as follows : (1) The altered layers which exist in high alumina brick used for arc-furnace roof were verified by mineral chemical analysis and EPMA. (2) The diffusion of materials combined with slag dust and iron oxide from furnace atmosphere in high basic process from hot face to interior was verified. (3)Activation energy for the synthesized slag permeated into the unused brick texture was 47-51 kcal per mole.

• 사상체질의학회지
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• 제19권1호
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• pp.1-18
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• 2007

1. Objectives This study is purposed to classify treatment and diagnosis of So-gal on the relationship of Sasang Constitutional Medicine. 2. Methods We compared conception, symptoms, mechanism and treatment of Sasangin's So-gal in ${\ulcorner}$Dongyisusebowon${\lrcorner}$ ${\ulcorner}$Gabobon${\lrcorner}$, ${\ulcorner}$Sinchukbon${\lrcorner}$ and ${\ulcorner}$Chobongwon${\lrcorner}$. 3. Result and Conclusion (1) So-gal of Soyangin is general disease, it is important disease of interior heat syndrome. So-gal of Taeumin is troubled by dryness of the lung, category of interior heat syndrome, but it bring about various complication. So-gal of Soeumin is important point that divide seriousness of disease. (2) So-gal is interior heat syndrome, it is related to interior heat syndrome of Soyangin, Taeumin. So-gal of Soeumin expresses conclusion of seriousness regardless of exterior and interior disease. (3) So-gal is related to nature, it is most important disease to Soyangin who is apt to variation of nature.

• 센서학회지
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• 제26권3호
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• pp.214-222
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• 2017

In this study, the effects of internal heat treatment associated sintering temperatures were simulated by the Finite Element Method (FEM). The sintering mechanism of pulsed current activated sintering process (PCAS) is still unclear because of some unexplainable heat transfer phenomena in coupled multi-physical fields, as well as the difficulty in measuring the interior temperatures of metal powder. We have carried out simulation study to find out thermal distributions between graphite mold and Ruthenium powder prior to PCAS process. For PCAS process, heating rate was maintained at $100^{\circ}C/min$ the simulation indicates that the sintering temperature range was between $1000^{\circ}C$ to $1300^{\circ}C$ under 60 MPa. The heat transfer inside the Ruthenium sintered-body sample was modelled through the whole process in order to predict the minimum interior temperature. Thermal simulation shows that the interior temperature gradient decreased by graphite punch length and calculation results well agreed with the PCAS field test results.

• Earthquakes and Structures
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• 제15권2호
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• pp.145-153
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• 2018

Extensive reinforced concrete interior beam-column joints with beams of different depths have been used in large industrial buildings and tall building structures under the demand of craft or function. The seismic behavior of the joint, particularly the relationship between deformation and strength in the core region of these eccentric reinforced concrete beam-column joints, has rarely been investigated. This paper performed a theoretical study on the effects of geometric features on the shear strength of the reinforced concrete interior beam-column joints with beams of different depths, which was critical factor in seismic behavior. A new model was developed to analyze the relationship between the shear strength and deformation based on the Equivalent Strut Mechanism (ESM), which combined the truss model and the diagonal strut model. Additionally, this paper developed a simplified calculation method to estimate the shear strength of these type eccentric joints. The accuracy of the model was verified as the modifying analysis data fitted to the test results, which was a loading test of 6 eccentric joints conducted previously.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.779-784
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• 2008

This paper presents a the method for estimating the noise source contribution on the road noise of the vehicle in a multiple input system where the input sources may be coherent with each other. By coherence function method, it is found that the biggest part of the noise source in the road noise is generated by structural vibration on the mechanical-acoustic transfer functions of vehicles. This analysis is modeled as four input/single output system because the noise is generated with four wheels that mechanism of the road noise is very complicated. The coherence function method is proved to be useful tool for identifying of noise source. The overall levels of the interior noise be coherence function method are compared with those measured and calculated by the frequency response function approach using mechanical excitation test. The experimental results have shown a good agreement with the results calculated by the coherence function method when the input sources are coherent strongly each other. The estimation of the road noise indicates that significant coherent can be achieved in the vehicle interior noise.

• 한국소음진동공학회논문집
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• 제18권11호
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• pp.1206-1212
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• 2008

This paper presents a the method for estimating the noise source contribution on the road noise of the vehicle in a multiple input system where the input sources may be coherent with each other. By coherence function method, it is found that the biggest part of the noise source in the road noise is generated by structural vibration on the mechanical-acoustic transfer functions of vehicles. This analysis is modeled as four input/single output system because the noise is generated with four wheels that mechanism of the road noise is very complicated. The coherence function method is proved to be useful tool for identifying of noise source. The overall levels of the interior noise be coherence function method are compared with those measured and calculated by the frequency response function approach using mechanical excitation test. The experimental results have shown a good agreement with the results calculated by the coherence function method when the input sources are coherent strongly each other. The estimation of the road noise indicates that significant coherent can be achieved in the vehicle interior noise.

• 한국실내디자인학회논문집
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• 제21호
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• pp.129-138
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• 1999

Generally part of museum collections are cycled exhibition space centering around preservation space, and that is a important mechanism of collections circulation in a museum. The reason why with a few exception most of collections have been lasting its life during over hundreds of years with adapting itself to natural features, so scheme of preservation facilities should be made up with understanding and analysis generic character of collections, and then establish proper temperature and huminity environment. So, this study is based on a fact that the collections' physical and chemical conditions vary in the relics a degree of transforatiov. And by making a suitable ganering environment, this gradual study is to provide planning factors for an architectural guide to make museum ganering environment organized and resonable.

• 한국실내디자인학회논문집
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• 제34호
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• pp.69-77
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• 2002

The purpose of this study is to recognize the living space and life pattern transition which is expressed in the modernization course with the analysis of the Jeju rural houses. For this study, I choose 72 residences examples in 8 villages as the subjects which are changed by the spontaneous purpose of the inhabitants who live in Jeju area were chosen as the subjects. As for the research method, after visiting the subject residence directly, and the field study such as the actual estimation, observation and interview were performed.The conclusion of the study with these purpose are as follows. First, The opened spatial composition of the sitting-inclination is composed of the form which has the individual opened room and living room with the mechanism to grant the flexibility to the limited space and the structure for enduring the much-humid oceanic climate. Second, The life pattern shows the sitting life which usually uses the an-bang and living room with the seasonal change.

• 한국실내디자인학회논문집
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• 제14권2호
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• pp.72-82
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• 2005

Metaphor has been regarded as a simple methods for decorating languages for a long time, nowadays it has important role in creative thinking. Designers have had used metaphoric thoughts in art work design and architectural design as well as writers. But designers and art critics have not recognize its importance, in addition research about metaphor specially in design have not even started yet in any design areas. This research is on the line of studying automation design by explain mechanism of metaphoric design regarded as black box. Ronchamp Chapel design by Le Corbusier has been analyzed and some metaphoric processes has been logically described. In this process, properties of sound are transferred and used as window design to control lights.