When reinforcing an existing reinforced concrete beam-column building with a precast concrete panel, special connection between the PC member and the RC member is required to solve the time dependent deformation of the RC member and to receive the large shear forces. The aim of this study is to obtain the shear strength of upper connection between the existing RC beam-column and infilled PC wall panels in experimentally and theoretically. Thus, the static shear loading tests were conducted on the 6 specimens with the plate connection. Shear failure was resulted from the weakest portion of interior PC panel, exterior RC, and the connection, when the PC portion which located at the center of specimen was pulled upward from the bottom. The experimental result was compared with analytical result from ACI 318M-14 Chapter 17 for the shear strength of post-installed anchor and PCI Handbook 7th edition 6.8 Structural Steel Corbel (PCI Design Handbook 7th edition, 2010) for the strength of cast-in H-beam. The analytical and experimental results show final failure at the same location. The failure loading of experiment showed larger than average 6% to that of the analysis.

In this study, ultrasonic detection device was applied to investigate connection part of concrete structure. Result of test, the internal void of connection part can be detected and it was possible to adopt the ultrasonic detection method to the maintenance of concrete structure.

This study is to investigate the ultimate strength and curling influence of single shear two bolted connection with 7075-T6 aluminum alloys. The validation of element analysis was verified through the comparison between test result and finite element analysis prediction and strength reduction rate by curling was estimated quantitatively. Moreover, additional parametric analysis with extended variables was conducted and the conditions of curling occurrence according to end distance and edge distance were proposed.

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.

지 신뢰성 있는 댐유입량의 장기예측은 효율적인 댐운영에 필수적이다. 2000년대 이후 엘리뇨-남방진동(ENSO) 등의 전구기후지수와 지역수문기후 와의 원격상관성이 규명되면서, 이를 활용한 미래의 수문조건을 예측하기 위한 연구가 활발히 시도되고 있다. 본 연구에서는 안동댐유역을 대상으로 미국 NOAA에서 제공하는 40개 전구기후지수의 원격상관을 분석하고, 이를 기반으로 1개월 선행 댐유입량의 예측성능 및 활용성을 평가하였다. 본 연구에서는 1) 원격상관을 통해 강수와 기온을 예측하고 SWAT 모델을 이용하여 예측 댐유입량을 산정하는 방법(SWAT-Forecasted), 직접 댐유입 량을 예측하는 기법(CIR-Forecasted), 예측시점의 관측값이 과거자료에서 해당하는 순위(rank)에 근거한 방법(Rank-Observed)을 비교하였다. 결 과적으로 통계적 방법으로 댐유입량을 직접 예측하는 접근 방식(CIR-Forecasted)이 12월을 제외하고는 다른 방법에 비해 우수한 예측성을 보였다. 이것은 강수량 및 기온 예측정보를 일단위로 상세화하는 가정과 유출모델링과정에서 발생하는 불확실성이 예측결과에 포함되지 않기 때문인 것으로 판단된다. 본 연구결과는 원격상관기반의 1개월 선행 댐유입량 예측이 안동댐 운영에 유용한 정보를 제공할 수 있는 것을 시사하였다.

말뚝머리-확대기초 접합부는 상부구조물의 하중을 말뚝으로 전달하는 연결부분으로서 부재의 단면과 강성의 급격히 변화하는 부 위이기 때문에 응력이 집중되고 작용하는 휨모멘트와 전단력이 큰 취약부분이다. 이 연구에서는 제작조건에 따른 PHC말뚝 및 합성 PHC말뚝 과 확대기초 접합부의 구조성능을 평가하는데 목적이 있다. 반복가력 하중 조건하에서의 균열패턴, 하중-변위관계, 연성비, 초기 회전강성 및 에너지소산 특성을 각각 평가하였다. 접합부 초기 회전강성은 확대기초 내부로 삽입되는 말뚝삽입 깊이와 축방향철근 배근위치에 큰 영향을 받는 것으로 나타났다. 또한 접합부 강도, 연성비 및 누적 에너지소산 등의 접합부 거동은 말뚝의 종류와 축방향 철근 배근 위치에 영향을 받는 것으로 나타났다.

The purpose of this study was to analyze the reduction of clamping force of TS (torque shear) bolted connection under fatigue loading. Generally, TS bolt has been totally tightened by torque shear wrench. However the plant structures experienced various fatigue loadings that makes reduction of clamping force of TS bolt. Therefore, this study conducted to the fatigue load test.

The purpose of this study was to investigate deformation and reduction of initial clamping force in slip critical type connection under fatigue loading. And, the parameters of this study were the different clamping force and friction coefficient of surface of plate. As a result, the clamping force of all specimens were generally decreased in comparison with initial values under fatigue loading.

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.

The connection parts of electric distribution cable can be damaged by wind and various types of outer loads. So, the reasonable connection system is required to solve these problems. Therefore, this study presents the composition type of self-tensioning connection system for electric distribution cable.

Some researchers suggested that bolt slippage occurred in column-tree connection type. In this paper, bolt slippage was evaluated on different depth of beam. When the length of beam set 7,500 mm equally, three depth of beams was 600, 500, 400mm, respectively. Also, column size of all specimens was same, and panel zones was strongly reinforced to evaluate bolt slippage in beams. As a result of full-scale testing, the bolt slippage of all specimens was occurred within plastic rotation ± 2.0%. It was showed that the effect of bolt slippage on depth of beam was slight.

Ultimate behaviors such as ultimate strength and fracture mechanism of fillet-welded connections with TIG(tungsten inert gas) welding have been investigated through test results. Main variables of specimens are weld length and welding direction against loading and ultimate strengths were compared according to the variables. Ultimate strengths were compared with current design predictions and modified design equations were proposed to consider the strength difference according to welding direction.

In the nuclear power plant, safety-related structures have been used above No. 11 rebar. It needs to mechanical connection device to join RC to SC walls because ACI 349 presents that lap splices shall not be used for bars larger than No.11 bar. The performance tests were performed to confirm structural integrity on connection of RC to SC using a mechanical connection device. But performing the tests in accordance with various connection cases has limitations, such as time or cost. Therefore, computational analysis methodology is developed in order to verify structural integrity for various connection cases.

최근 도심지에 건설되는 건축물의 초고층화는 기둥에 작용하는 하중을 증가시켜 기둥단면 증가와 사용면적 확보의 어려움을 발생 시키고 있다. 이에 최근에는 CFT와 같은 합성기둥의 사용이 증가하고 있는 추세이다. 그러나 CFT 기둥의 경우 폐단면으로 이루어져 있어 보- 기둥 접합부 개발의 어려움과 성능저하의 문제가 발생하게 된다. 특히, 원형CFT 기둥과 외다이아프램을 이용한 접합상세 개발의 연구가 미비 한 실정이다. 이에 본 연구에서는 Y형 플레이트를 적용한 원형 CFT 기둥-H형강 보 접합부 접합상세를 개발하여 Y형 플레이트를 적용한 접합 부 구조성능에 영향을 미치는 Y형 플레이트 폭 및 두께를 주요변수로 설정하여 실험을 통해 구조성능을 평가하였다. 또한 실험체에 사용된 Y 형 플레이트는 설계기준에 제시된 장기허용인장력이 Y형 플레이트에 접합된 인장 측 플랜지의 축방향력 이하가 되도록 설계하여 파괴형태를 통해 Y형 플레이트의 구조적 안전성과 성능을 확인하고자 한다.

교과를 연계하여 인성 교육을 한다는 것과 교과를 통합하여 인성교육을 한다는 것은 그 양 상에서 현격한 차이가 있다. 교과를 연계하여 인성 교육을 한다는 것은 도덕과에 무게중심을 두고 다른 교과와의 협력을 도모한다는 것이고, 교과를 통합하여 인성 교육을 한다는 것은 전 교과를 가르치는 과정에서 인성 교육이 가능하도록 한다는 것이다. 이는 인성을 교육의 목적으 로 하는 점에서는 유사한 의미라고 볼 수 있으나, 인성을 직접 겨냥하여 교육을 하는지 아니면 각 교과 교육의 실제적인 목적을 먼저 달성하는 과정에서 인성을 교육하는 것인지에 대한 차 이가 있다. 전자의 경우에는 인성이 교과 교육을 받은 사람이 가져야할 당연한 목적이 되는 것인데 반 해, 후자의 경우는 인성이 생활에 필요한 기술 교육보다 후순위에서 강조되는 결과를 초래한 다. 이런 경우 교과 교육은 수단의 의미 이상을 추구하기 어렵게 되고, 이는 교과 교육의 근간 이 흔들리게 되는 위험을 내포한다. 본 연구에서는 교과 통합을 통한 인성 교육은 그 자체의 모순점으로 인해 배제하고 도덕과가 중심이 되어 인성교육을 하는 교과연계의 관점에서 한 가 지 방법을 제시하는 것을 목적으로 진행하였다.

Authors investigated the fatigue bond performance on the grouted joint connection of wind tower. High strength cementeous grout has 140MPa of a compressive strength was incerted in the gap of small scaled steel tube simulated the wind tower joint. The stress level was 65 and 74% of static strength that is 35MPa, respectevely. From the test, each specimens endured the repeated loads up to 2,000,000 cycles.

This study investigates the ultimate strength and curling influence in single shear bolted connection with 7075-T6 aluminum alloys using numerical approach. The applicability of finite element analysis was validated through the comparison between existing test results and numerical predictions. Curling was observed in some specimens with a relatively long end distance and reduced the ultimate strength of bolted connection. Strength reduction ratio by curling was estimated quantitatively and it is known that curling caused the strength reduction by maximum 21%.

Austenitic stainless steels have excellent corrosion resistance, durability, aesthetic appeal, fire resistance etc. compared with ferritic stainless steels and so especially 304 stainless steels have been utilized widely in the exterior member of building structure. In this paper, ultimate behaviors such as ultimate strength and fracture mechanism of fillet-welded connections with TIG(tungsten inert gas) welding have been investigated through test results. Main variables of specimens are weld length and welding direction against loading and ultimate strengths were compared according to the variables.

The result of structural performance evaluation about circular CFT column-H shape steel beam which was performed as in previous study, even though we designed the Y type plate tension as below the axial force which was under design criteria, the flexure of steel beam was happened. For these reasons, in this study, to figure out the time of connections failure and the minimum value of parameters in order to evaluate the performance of advanced Y type plate in detail.

In this study, seasonal customs are analyze the appropriate festival for each 24 seasonal divisions of the year. Recover the intrinsic value of the festival and selected the target villages and each village should investigate elements of the festival. The village were sought activation of a rural village by setting the festive season. ① 24 seasonal divisions of the year festival is a small town festival, the festival's program is based on the experience-oriented. Based on period seasonal customs and season plays are set up 24 seasonal divisions of the year festival's program. ② Survey area is the rural tourism village carried seven villages at Cheongju-si in Chungcheongbuk-do. ③ 24 seasonal divisions of the year festival establish as possible to the festival program is based on 24 seasonal divisions of the yearfestival seasonal customs, seven villages were set on the festival. on the season sesipung through the festive season as possible to the festival program was set up, seven villages were set on the festival. The first standard, festivals and events that are currently made . Second,now ongoing in the village is experience program and a 24 seasonal divisions of the year seasonal customs resource. ④ As a result, each period of the festival was set in the village. ⑤ By festival setting recover intrinsic value of the festival by taking advantage of 24 seasonal divisions of the year. The common interests of the rural town of experience, the rising interest in each town and village festivals activation of the network can be achieved.