• Structural Engineering and Mechanics
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• 제21권5호
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• pp.553-570
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• 2005

Dynamic and static analyses of existing structures are very important to obtain reliable information relating to actual structural properties. For this purpose a series of material test, dynamic test and static collapse test of the existing two brick chimneys, in Tokoname, are carried out. From the material tests, Young's modulus and compressive strength of the brick used for these chimneys are estimated to be 3200 MPa and 7.5 MPa, respectively. The results of static collapse test of the existing two brick chimneys are discussed in this paper and composed with the results from FEA (Finite Element analysis). From the results of dynamic tests, the fundamental frequencies of Howa and Iwata brick chimneys are estimated to be about 2.69 Hz and 2.93 Hz, respectively. Their natural modes are identified by ARMAV (Autoregressive Moving Average Vectors) model. On the basis of the static and dynamic experimental tests, a numerical model has been prepared. According to the European code (Eurocode n. 8: "Design of structures for earthquake resistance") non-linear static (Pushover) analysis of the two chimneys is carried out and they seem to be vulnerable to earthquakes with 0.25 to 0.35 g.

• 한국농공학회지
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• 제16권2호
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• pp.3395-3409
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• 1974

The purpose of this study is to test and compare the efficiency of heating-system for materials and construction of the wall, ceiling and window in soil brick house, cement house and boulder house respectively, in order to construct ideal farm houses in rural area. The results obtained were as follows: 1. In heat conservation due to construction of walls the thermal efficiency of cement brick house was equivalent to 66.3% of that of soil brick house, and boulder house 60.3% 2. In the case of ceiling, the thermal efficiency of paper ceiling was amounted to 84.2% of that of the composite ceiling (thickness 6mm veneer+thickness. l0m chaffs), and the common ceiling putting on soil above the ceiling, 76% of the composite while the efficiency of the ceiling putting on chaffs above them was 15.8% higher than that of the paper. 3. In the case of improving the window, the double type was 12% higher than. the efficiency of single type. 4. The warming velocity of conventional house was slower but the velocity of radiation was quicker than that of experimental one. It was thought to be due to unscietific constructions of the room bottom, fire inlet and chimney, 5. The temperature gradient line was not dependad upon the amount of throwing into fuel in the rural farm house. 6. It was concluded that the final thermal efficiency of the conventional farm house was 10.6% lower than that of experimental farm house.

• Structural Engineering and Mechanics
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• 제8권5호
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• pp.491-504
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• 1999

The initiation of toppling is explored for a uniform stack of blocks that rotates slowly about its mid-base. As the stack passes through its vertical position ($\theta$=0), it is in free-fall rotation, and a critical inclination angle ${\theta}_c$ is reached at which the toppling stack "fails" or begins to crack or separate. For tall stacks (high aspect ratios), two modes of failure are hypothesized, for which the dynamic failure analyses are shown to correlate with experimental results. These block failure modes are similar to those observed for tall, toppling masonry structures with weak binding material between their brick or stone blocks.

• 디자인학연구
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• 제14권4호
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• pp.87-98
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• 2001

조선조(1392∼1910)의 궁궐·사원·상류민가의 담과 굴뚝에는 장식 문양이 다채로운 조형을 이루고 있다. 본 연구는 도자벽제작에 관한 환경디자인 연구의 일환으로서, 전(塼)과 와편(瓦片)으로 만들어진 조선조 담과 굴뚝의 전통적인 장식문양의 유형화를 시도하여 그 조형의 특성을 고찰한 것이다. 전국에 걸쳐 현지조사에 의해 수집된 685점의 문양 18종을 유형별, 대상별, 건축종별, 구성재료별, 장식기법별의 5가지로 유형화하여 상호 조형의 관련성을 검토했다. 그 결과 조선조의 담과 굴뚝에 나타나는 장식문양은 유형마다 명확한 조형의 차이와 공통성이 나타나고 있음을 알았다 또, 이들 문양의 유형을 궁궐형·사원형·민가형으로 종합하여 보면 일부의 예외적인 것도 있지만, 각각의 유형은 독특한 조형적 규범을 갖고있음을 알게 되었다. 즉, 궁궐형의 담과 굴뚝은 궁궐전유(專有)의 붉은색과 회흑색의 전을 사용해서 정교한 길상(吉祥)과 벽사(벽邪)문양을 조형화하고, 사원형과 민가형에서는 구조보강을 겸하여 와편을 겹쳐 쌓은 문양을 수평으로 연속시켜 조형화 한 것이 담과 굴뚝의 기본적인 장식이라는 것을 알 수 있었다.