An experimental study was carried out to evaluate the punching shear performance of H-steel column + RC slab system for vertical load. Three specimens were constructed for interior column-slab system. All specimens were the same configuration and material properties except for columns such as RC column+flat plate slab and H-Steel column+flat plate slab. From the test results structural characteristics (maximum proof stress, maximum displacement, deformation capabilities and so on) are obtained and evaluated.

This study aims at developing a new shape damper and suggestion for seismic silo structure, which contribute to increase significantly seismic performance and constructional efficiency. The suggested N.B.B.D system is more likely to adoptable because it remarkably contribute to save inter-story drift also to have many advantages compared with conventional X or K type braced frame.

Western style timber roof trusses used as typical roof structures of buildings during a modern period have been developed with the interactions with their facade and functionality. The shapes of trusses and member sizes have been diversely changed by the purposes of architects, historical circumstances, and structural characteristics. For this reason, the change in the shapes of western style timber trusses along the times is one of important technology assets demonstrating the development of their structures during the modern period. Therefore, the purpose of this paper is to find out their structural characteristics throughout parametric analysis of which parameters were determined from the collected and classified documents on western style timber roof structure built in the modern period carefully obtained from public institutions. Results of the parametric analysis are as follows. The number of king-post trusses and modified king-post trusses built between 1920 and 1937 reaches almost half of the total number of truss types investigated. The mean values of their spans, distances, tributary areas, and height are respectively, 10.5m, 2.4m, 24.37㎡ and 3.24m. The cross-section areas of trusses tend to reduce since the city construction law was enacted in 1920. Also, this study found that western architects usually used larger structural members than eastern architects and usages and finishing materials of roof trusses are not always considered as one of the important design parameters.

이 연구는 울트라마라토너들의 초장거리 달리기 동안의 심리적 상태를 평가하기 위해 수행되었다. 이러 한 연구 목적에 부합하기 위하여 100km 울트라마라톤 대회에 참여한 주자들(n=44)을 대상으로 총 4회에 걸쳐 각각의 체크포인트 지점(23-,54-,83-100km)에서 자각적 운동강도를 측정하였으며 이와 더불어 기분 상태 측정을 3차례(경기 직전, 54-,100km)에 걸쳐 실시하였다. 분석 결과, 울트라마라토너들은 100km의 경기에서 거리의 증가에 따라 심리적 피로의 증가를 나타냈으나 마지막 100km지점에서는 오히려 자각 적 운동강도 지수가 급격히 감소되는 것으로 확인되었다. 또한 100km 레이스의 중반지점인 54km에서 측정한 기분상태 변화에서 우울, 긴장, 분노와 같은 부정적 감정수준은 경기전에 비해 감소되었고, 100km 완주지점까지 유지됐으며, 각 구간별 기분상태 프로화일 결과 빙산형 프로화일이 나타났다. 결론 적으로 울트라마라토너들은 100km 완주과정에서 심리적 피로의 증가에도 불구하고 긍정적 기분상태를 유지한다는 것을 알 수 있었다. 이러한 긍정적인 기분상태의 경험은 초장거리 운동수행에서의 심리적 효과로서 중요하게 작용할 수 있다는 것을 시사한다.