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저층형 학교 건물의 비선형정적해석에 대한 유효성 및 내진성능평가
송병훈 ( Song B. H ),한병찬 ( Han B. C ),전경화 ( Jyoun K. H ),김용철 ( Kim Y. C ),윤현도 ( Yun R. D ),정수영 ( Chung S. Y ) 한국구조물진단유지관리공학회 2001 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.5 No.1
Considerable numbers of earthquake have been reported steadily in Korea. Under this circumstance, there is a need to consider about the importance of the building as a shelter place and existing school buildings could be used as one of the buildings with the purpose. However, they are not designed by seismic design criteria because most of their height is under 6th floor. And there are not any seismic capacity evaluation provisions established in Korea. The aim of this paper is to verify validity of nonlinear static analysis and to evaluate seismic performance of school buildings using Capacity Spectrum Method. The analytical study was performed with Drain-2dx program. It is indicated that Pushover Analysis was acceptable to evaluate the seismic performance of low-rise school buildings. Analysis results also indicate that school buildings have satisfied seismic capacity about lateral deformation limits but failed about elements response limits for immediate occupancy.
한우비육에 관한 연구;한국 빈우의 연령과 비육기간이 비육효과에 미치는 영향
조윤연,육종융,송계원,설동섭,정수영,연시중 한국축산학회 1966 한국축산학회지 Vol.8 No.1
This experiment was conducted to study the effects of age and periods on the fattening of Korean native cattle. Thirty-six herds of non-pregnant cows were alloted into 12 treatments combined with three levels of age (1.5 to 2, 4 to 5 and 8 to 10 years) and four levels of fattening periods (60, 90, 120 and 150 days). The results obtained are summarized as follows; 1. In daily gain a significant difference (p$lt;0.05) was observed among levels of age but there was no significant difference among levels of fattening period. Sixty-day period was the most effective fattening period for the 1.5 to 2 years old cow with its daily gain 0.92 ㎏ and 90-day period was the most effective fattening period for the 4 to 5 and 8 to 10 years old cow with their body gain 0.84 and 0.69 ㎏. 2. Significant (p$lt;0.01) difference in feed efficiency was observed with age and fattening period. In other words older cows required more feeds for 1 ㎏ gain. In This trial age affected highly significantly (p$lt;0.01) the amounts of DCP and TDN required and fattening period was also significantly (p$lt;0.05) affected the only the amount of TDN required for 1 ㎏ gain. 3. There was highly significant (p$lt;0.01) difference in the dressing percentage and marbling degree among fattening period. Dressing percentage was not affected by age, but marbling degree was affected significantly. Longer fattening period showed higher dressing percentage and marbling degree. 4. 1.5 to 2 years old cow fattened for 60 days showed highest net income with 102.22 won daily. Average daily net income of 4 to 5 years old cow with 90 days fattening and 8 to 10 years old cow with 60 days fattening was 49.49 won and 41.15 won. It showed that more net income could he induced with short period of fattening.