본 조사는 임하댐을 대상으로 상.중.하로 구별하여 호수내에 16개 정점, 유입하천에 3개의 정점등 모두 19개의 정점을 선정하여 1996년 8월 5일과 9월 10일에 식물플랑크톤의 군집구성, 현존량, 우점종 그리고 각 지수를 조사하였다. 본 조사에서 동정된 식물플랑크톤은 6강 13목 6아목 25과 66속 143종 27변종 1품종으로 모두 171종류였다. 현존량 변화에서 표층은 47.350×103 ~184.65×103 ind

In this stydy, experimental research was carried out the hysteretic behavior of reinforced concrete haunched beams such as application with or without haunched. Test results showed that test specimens(FTH) was increased respectively the maximum load carrying capacity by positive 18%, negative 29% in comparison with the specimens(FTG). And the specimens(FTH) showed stable hysteretic behavior compared to the specimen(FTG)

In this study, four reinforced concrete beam-column joints, replacing recycled materials with hybrid fiber were constructed and tested under monotonic loading. Experimental programs were carried out to improve and evaluate the seismic performance of such test specimens, such as the load-displacement, the failure mode, and the maximum load carrying capacity. All the specimens were modeled in 1/2 scale-down size.

In this study, experimental research was carried out to improve the seismic performance of reinforced concrete exterior beam-column joint regions using replacing recycled coarse aggregate with hybrid fiber (steel fiber+PVA fiber) in existing reinforced concrete building. Therefore it was constructed and tested seven specimens retrofitting the beam-column joint regions using such retrofitting materials. Specimens, designed by retrofitting the beam-column joint regions of reinforced concrete building, were showed the stable failure mode and increase of load-carrying capacity due to the effect of crack control at the times of initial loading and bridge of retrofitting hybrid fiber during testing. Specimens BCJGPSR series, designed by the retrofitting of replacing recycled coarse aggregate with hybrid fiber in reinforecd beam-column joint regions were increased its maximum load carrying capacity by 1.01~1.04 times and its energy dissipation capacity by 1.06~1.29 times in comparison with standard specimen BCJS. Also, specimen BCJGPSR1 were increased its energy dissipation capacity by 1.33~1.65 times in comparison with specimens BCJS, BCJP and BCJGPR series for a displacement ductility of 9.

In this study, experimental research was carried out to study the high strength RC exterior beam-column joints regions, without the shear reinforcement, using high ductile fiber-reinforced mortar. Test results showed that specimen BCJNSP1.0 were increased th maximum load-carrying capacity and showed stable hysteresis behavior and satisfactory crack pattern in comparison with th specimen BCJNS without shear reinforcement in the beam-column joint region.

In this study, experimental research was carried out to study the structural performance of slab-column joints designed by the application of reducing of joint regions damage using steel fiber reinforced concrete. Test results showed that specimens(RCFPS series) were increased the maximum load-carrying capacity by 1.12~1.23 times and showed stable hysteresis behavior in comparison with the standard specimen(SRCFP).