철골기둥-베이스 플레이트 접합부의 파괴유형은 베이스 플레이트 압축면과 인장면의 휨파괴, 앵커볼트의 인장파괴, 뽑힘, 전단파 괴, 그리고 콘크리트 기초파괴 및 철골기둥의 소성힌지발생에 따른 파괴이다. 본 연구에서는 핀접합 또는 강접합으로 가정하여 설계되는 노출 형 철골기둥-베이스 플레이트 접합부가 받을 수 있는 모멘트의 크기를 구하기 위하여, 한계상태 함수를 이용하여 철골기둥-베이스 플레이트 접합부의 휨성능 및 파괴유형을 예측하고 실험결과와 비교하였다. 한계상태함수를 이용하여 노출형 철골기둥-베이스 플레이트 접합부의 휨 성능을 비교적 정확히 예측할 수 있는 범위는 축력이 있는 경우, 앵커볼트의 항복 또는 철골기둥의 항복으로 판별되었을 때이며 축력이 없는 경 우, 베이스 플레이트의 항복으로 판별된 경우이다. 파괴유형까지 같이 고려할 경우, 축력이 있으며 앵커볼트의 항복으로 판별된 경우에만 한계 상태함수의 사용이 가능하다.

In Korea, Small-size buildings are not performed structural calculation. Also it does not assess the safety about lateral loads such like earthquake. In this study, We proposed the steel column bases that can be applied to small buildings. And We analyzed the Steel Column Bases flexural behavior.

This study compares the steel column-base plate connections to improve the flexural capacity of small building. In addition, performance level was evaluated by example building. Analysis results, an additional reinforcement is required to the proposed steel column-base plate connection. And then, We should compared the impact of beam-column joints.

Based on AISC Design Guide-#1, limit-state function of steel column-base plate connection is defined. Comparison with test and numerical result, this method acculately predicts bending moment capacity of this connection.

Railroad sites are exposed to noise and vibration problem due to train operation. This train-induced noise and vibration transferred from the ground to the near existing building. It is possible to cause a vibration in the building. Evermore, the tenant in the building enable to feel such train-induced noise and vibration. Based on that, a device, termed anti-vibration device, to reduce noise and vibration in the building was needed and was invented through this study.

This study analyzed the change in tropical cyclone (TC) activity according to the fluctuation in July-to-September average North Pacific Oscillation index (NPOI) and its underlying large-scale environment during the last 37 years from 1977 to 2013. For this purpose, seven years with highest index NPOI value (positive NPOI phase) and another seven years with lowest NPOI index value (negative NPOI phase) among the 37 years were selected as sample after excluding the ENSO years. During the positive NPOI phase, TCs were created in the east of tropical and subtropical western North Pacific and moved to the west from the Philippines toward the southern region in China or toward far eastern sea of Japan. Meanwhile, during the negative NPOI phase, TCs tended to proceed to the north toward Korea or Japan passing East China Sea from the eastern sea of the Philippines. As a result, also in the TC recurvature, TCs in positive NPOI phase showed a tendency of recurving toward more eastern direction compared to TCs in negative NPOI phase. Hence, TC intensity was stronger in negative NPOI phase which allowed more time for obtaining energy from the ocean.

In this study, based on the Building Register, status and existing structural criteria of small-scale steel-frame building is reviewed. As a result, the accumulated small-scale buildings account for about 85% of cumulative entire building. Furthermore, since 2000, the small-scale steel-frame buildings account for about 55% of the small-scale buildings. In other words, the proportion of small-scale steel-frame buildings has been increased. However, the structural criteria is not only insufficient but also structure for some small-scale steel-frame buildings does not have a reference.

In this paper, we determine the number of reinforced pile foundations required for vertical extension remodeling through analysis of construction steps on all combinations of load including the seismic load and vertical load.

Recently, a safety of the building has been issued. In this study, a statistical analysis of the licensing status of the building construction has been performed to check the trend of building construction. Finally, results of the statistical analysis would be helpful to improve of the building safety.

Shows the problem of exposure to vibration generated from vehicle and train adjacent to the railway facilities are housing facilities. As a method for solving the problems caused by the vibration countermeasures have been provided various methods such as the vibration of the vibration trajectory, wave barriers wall, vibration isolation mat. Therefore, in the present study is to evaluate the vibration analysis by using vibration isolation mat for vibration reduction of housing facilities.

We found that, in 1984, there was a climate regime shift in April mean precipitation in Gwangju of Jeollanam-do province, Korea using a statistical change-point analysis. During the period of post-1984(1985-2013), the April mean precipitation in the years post-1984 showed a distinct decrease, compared to the pre-1984 period(1954-1984). This regime shift was also observed in China and Japan, excluding southern China. One of the major causes for the decreasing April mean precipitation during the recent three decades was the increased snow depth in the mid-latitude regions of continental East Asia. The increased snow depth resulted in strengthened cold and dry anticyclone anomaly over continental East Asia and a relatively weakened subtropical anticyclone anomaly over the western North Pacific. The anomalous synoptic conditious supported a continuation of the typical winter pressure pattern of ‘high-West and low-East’ over East Asia in April. The intensified northerly winds from this zonal pressure pattern anomaly played a significant role in restricting the northern movement of the subtropical anticyclone and there by preventing the inflow of warm and humid air into Korea.

In this paper, construction staged-analysis is introduced to understand how the additional loads transfer to existing and added piles. Added piles are not able to take on the existing load due to mechanical problem.

The goal of the study is to investigate vibration reduction effects in the ground due to the train-induced vibration using wave barriers. Rubber-based material has been selected for wave barriers and various barrier depths have been considered during numerical analysis. Result shows that the reduction effects are increased with proportional to the barrier depth, as one expected. Finally, results can be applied to design wave barriers for reducing transferred train-induced vibration to near structures.

Typically low-rise dormitory designed bearing wall system. So, insulated concrete sandwich panel for the application of a rigid frame structure was changed. This study presents field application of insulated concrete sandwich panel through applying Test-Bed.

Residential structures have been constructed near roads and railways in order to obtain an easy access to city and solve the limited land-use problem. But this trend has a weak point, such as noise and vibration due to the public transportation and it caused to make a civil petition. The goal of this study is to analyze the train-induced ground vibration effects on the structure and its reduction technique. Finally, this study can be helpful to provide a guideline to solve a civil petition and make a vibration reduction device.

In the present study, changes in the activities of typhoons in the early typhoon season (April-June) in relation to the intensity of Siberian anticyclones and large scaled atmospheric circulations that cause those changes were analyzed. In years of positive Siberian anticyclones, typhoons occurred in the western waters of the subtropical western Pacific and went through the South China Sea to move toward the ashore to the southern coast of China or came north from the deep sea on the southeast of Philippines, changed directions and moved to the deep sea on the east of Japan. In years of negative Siberian anticyclones, typhoons occurred in the western waters of the subtropical western Pacific, went through the East China Sea and changed directions to move toward Korea and Japan. These differences between the two years were identified through stream flow differences at 850 hPa and 500 hPa between the year of positive Siberian anticyclones and the year of negative Siberian anticyclones. In both analyses, the cold northeasterly anomalies formed because anticyclonic circulation anomalies were centered on the Sea of Okhotsk and cyclonic circulation anomalies were center on the middle-latitude waters of the northwestern Pacific affected the Republic of Korea and Japan. Therefore, the cold northeasterly anomalies played the role of steering flows to prevent typhoons occurred in the subtropical western Pacific from moving toward Korea and Japan in years of positive Siberian anticyclone indexes. In particular, according to the analysis of stream flow at 850 hPa, cyclonic circulation anomalies were reinforced in the western waters of 140°E in the subtropical western Pacific and anticyclonic circulation anomalies were reinforced in the eastern waters of 140°E in the subtropical western Pacific and thus the former waters provided good environments for the occurrence of typhoons in years of positive Siberian anticyclone indexes and the latter waters provided good environments for the occurrence of typhoons in years of negative Siberian anticyclone indexes.

This paper analyzed the CO2 emission of existing buildings with reconstruction and reusing in the declined residential area of Jeonju old town. The average CO2 emission to square meter of residential buildings in Jeonju is 1.7tCO2/m2.

This paper analyzed the CO2 emission of existing buildings with reconstruction and reusing in declined commercial area of Jeonju old town. The average CO2 emission to square meter of commercial buildings in Junju is 1.4tCO2/m2.

This study is to evaluate performance of two-way acting insulated sandwich wall panels through flexural experiment. The two-way acting panel resists wind loading on the panel and on the window. In this study, GFRP(Glass Fiber-Reinforced Polymer) Grid-type shear connectors are used for the composite action of the sandwich wall panels. Layouts of shear connector are considered as main parameter of this experimental study.

This study is to evaluate fatigue resisting capacity of insulated sandwich wall panel under wind-induced fatigue loading. The fatigue loading is calculated based on the probability distribution function (Weilbull and Rayleigh). The serviceability of the insulated sandwich panel was evaluated subjected to the probability-based fatigue loading.