In this study, measurement temperature in the bridges was compared with temperature proposed by Korean design code. In addition, the structural analysis was performed in order to comparing the stress by measured thermal load and the stress by design thermal load. As a result, the stress that applied measurement temperature was evaluated larger than the stress that applied temperature proposed by Korean design code.

The purpose of this study is to analyze the trend of domestic and foreign steel plate shear wall (SPSW) systems. The investigated countries were three, such as Korea, Canada, and U.S. The full scale or scale down specimens were preponderantly investigated. The details and performances of all specimens were compared for each other.

The use of steel deck-plate has continuously increased in slab construction because of efficiency of construction-ability. Slab member is not only resisting the loads but sensitive the deflection. Generally, steel deck-plate slab has higher equivalent moment of inertia than normal RC slab because of its bottom steel plate. In this study, stiffness variation of the various slab was experimentally examined.

Using trapezoidal corrugated plates in shear reinforcing systems improves stiffness and flexibility in the deformation along the corrugation. However, shear buckling behaviors is difficult to predict the relationship between the corrugated shape. In this study, a cyclic loading test of the trapezoidal corrugated plate was performed to evaluate the effects of energy dissipation capacity were compared according to the test results.

This paper presents the results of an experimental test conducted subjected to blast loading of steel plates. An experimental results were compared with the simulation result derived in AUTODYN to validate the simulation method used in this study.

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.

이 연구에서는 SC 전단벽의 전단 연결재인 스터드의 배치와 형상이 SC 전단벽의 거동에 미치는 영향을 살펴보기 위해 전단벽체가 반복의 전단하중을 받을 때의 거동을 해석적으로 검토하였다. 이를 위해 서로 다른 배치간격과 형상의 스터드가 배열된 SC 전단벽을 대상으로 유한요소해석을 수행하였다. 그 결과, 하중-변위이력곡선으로부터 스켈레톤 곡선을 얻었고 스터드의 간격이 좁을수록 극한강도 및 항복강도가 크게 나타남을 확인했다. 또한, 일반 스터드 보다 경사부재가 있는 경사 스터드의 강도가 더 크게 나타났고 강성비가 줄어들수록 감쇠비가 증가함을 확인했다. 최종적으로 스터드의 간격이 좁을수록 누적손상에너지가 크게 나타나며 내진성능이 우수함을 확인하였다.

After reviewing the technical consulting reports and field surveying the whole corrugated steel plate structures in the Expressway, factors causing the problems are analyzed suggestions for the improvement of the design and construction of the structures are given.

In this paper, punching shear test of flat plate reinforced by plates with openings has performed. And compared critical section of ACI 318, BS 8110, and Eurocode 2. Non-reinforced specimens and specimens that reinforced by GFRP plates with openings are manufactured. Shear reinforcement spacing was used as parameter for specimens reinforced by GFRP plates. Crack pattern showed that critical section increased as shear reinforcement spacing increased compared to critical section of ACI 318, BS 8110, and Eurocode 2. Critical section calculated by ACI 318 was the smallest predicted section, and sections calculated by BS 8110 and Eurocode 2 are larger predicted section.

This paper presented to study used Abaqus on steel plate bonded reinforcement technology for column to beam connections, and then the result showed that steel plate bonded reinforcement technology has great reinforcement effect for RC column to beam joint. Also the steel plate bonded reinforcement technology was safety and convenient operation.

The objective of this study is to understand the flexural reinforcement effects of RC slab reinforced with HFRP plate. To this end, an experiment was conducted by fabricated five RC slabs with the variables such as the number of anchors, epoxy injection amount and position. The Strength formula calculation on the specimens, was calculated to apply the ACI 440.2R-08(10.2.10). The results of this study, the stiffness, strength and structural performance of reinforced specimens are appeared very high compared with non-reinforced specimen, so the flexural reinforcement effects were very good. And the flexural reinforcement effects depending on the number of anchors and epoxy injection method was confirmed to differ greatly. Additionally, it is possible to predict the required number of anchors to the structure through the strength formula calculation.

This study analytically reviewed the dissipated energy and ductility of Steel Plate Concrete (SC) walls subjected to cyclic shear forces to investigate the effects of shape and arrangement spacing of studs on the design of SC walls. As the decrease of stud spacings, the cumulative dissipate energy was increased and the seismic performance was improved. Under the same cumulative dissipate energy, the ductility was increased as the increase of stud spacings and the influences with stud type was insignificant.

In this study, trapezoidal corrugate plate were subjected to cyclic loading under displacement control. And then, results from the experiment, the behavioral characteristics and mechanism of energy dissipation were investigated. This result were different to the cumulative size of energy dissipation capacity in load-displacement curve. Based on these results, Influence of the shape is very large and it is determined the define an appropriate shape for the size.

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.

In this study, the shear buckling strengths of the trapezoidal and sinusoidal corrugated plates with the same self-load were compared, and their characteristics and tendencies were analyzed. In the preceding comparative study of corrugation shapes, the corrugation wave depth and the corrugation wave angle were the same. As these target, A linear buckling analysis was conducted, and the differences in the shear buckling mode and the buckling stress were analyzed.

In this paper, the RC column-based joint connection part carry out loading test by reinforced hollow or extended Base Plate in order to confirm that RC joint punching shear reinforcement effect of applying the Base Plate. Base Plate thickness, extension length, size, and type as the variable, Base Plate suitable for the stress distribution and shape and dimensions confirmed through experiment and then reinforcing effect was analyzed. Experimentally, vertical load transmitted to the Base Plate from column to foundation is effective to stress distribution and then, type of hollow reinforcement more efficient than a closed. Through experiment, improve performance and ductility due to reinforcement and relative to the thickness of the existing foundation reduced even showed better performance than the existing. The behavior of the reinforced specimens be able to induce from brittle to ductile. Experiment on loading to destroy performed the pattern of cracks, destruction aspect before and after reinforcement.

This study analytically reviewed the behavior of Steel Plate Concrete(SC) walls subjected to combined loads of axial force, flexural moment, and shear force to investigate the effects of shape and arrangement spacing of studs on the behavior of SC walls. To perform it, 9 cases of finite element analyses considering the different shape and spacing of studs in SC wall were carried out. The results showed that, for SC walls combined steel plate and concrete according to the Design Code, the compressive strength is higher than the tensile strength. Compared results from the finite element analyses of SC walls subjected to combined loads with Design Code showed that all cases were higher than the design strength. For KEPIC SNG, the moment and shear force were not influenced by the axial force of 0.1 to 0.2 times axial strength, however, from the analyses, it was found that the values were decreased as the axial force is increased.

흙-함수특성곡선(Soil-Water Characteristic Curve, SWCC)은 모관흡수력과 포화도 혹은 체적함수비 사이의 관계를 나타내어주는 불포화토 고유의 물성으로서 불포화토의 흐름특성을 이해하고 함수량에 따른 흙의 강도 및 응력 거동특성을 해석하는 데 필수적인 요소이다. 흙-함수특성곡선에 대한 선행 연구결과들의 경우, 건조 및 습윤과정에서의 간극수 유출입량을 측정하여 모관흡수력에 대한 체적함수비를 산출하여 왔다. 본 연구에서는, 압력판 추출 시험기(VPPE)에 전자기파의 시간영역반사법(Time Domain Reflectometry, TDR)을 도입하여 불포화토의 건조 및 습윤과정에 따른 유전상수 측정을 통해 체적함수비를 산정하고자 하였다. 압력판 추출 시험기는 압력셀, 압력조절장치, 뷰렛 시스템, TDR 프로브로 구성된다. 압력조절장치로 압력셀 내부에 공기압을 가하여 모관흡수력을 조절하였고, 가압범위는 0.1kPa-50kPa으로 설정하였다. 모관흡수력 변화에 따라 시료내 함수량이 변화하였으며, 뷰렛 시스템을 통하여 변화량을 측정하였다. 프로브의 경우 압력셀 내부에 설치하고, 프로브 양단에서 발생되는 전자기파의 반사 신호를 이용하여 유전율을 산정하였다. 실험결과, 전자기파의 시간영역반사법에 의해 산정된 체적함수비는 시료의 체적함수비와 높은 상관성을 나타내었다. 본 논문은 흙-함수특성곡선 연구에 시간영역반사법을 접목시켜 불포화토의 함수특성을 파악하고, 기존 방식과의 비교를 통해 함수특성곡선 결과에 대해 검증할 수 있다는 점에서 의미가 있다.

본 연구는 정현형 주름과 마름모형 주름 형상의 전단좌굴 특성을 비교, 분석하는 것이 목적이다. 이를 위해서 동일한 길이의 마름모꼴주름과 정현파주름을 해석대상모델로 채택하였으며, 선형좌굴해석을 통한 전단좌굴특성과 이론식에 의한 특성을 분석하였다. 일반적으로 주름강판의 전단좌굴 형태는 국부좌굴, 전체좌굴 및 두 좌굴에 의한 연성좌굴로 분류된다. 그러나 마름모꼴주름과는 달리 정현파주름형상은 평평한 면이 없기 때문에 전단좌굴의 양상에 대한 경향이 달라진다. 특히 국부좌굴과 전체좌굴의 경계에서 나타나는 전단응력변화와 양상은 주름형태에 의해 차이가 난다. 분석 결과에서 볼 때, 제형 (마름모꼴)의 경우는 이론식내의 전체좌굴과 국부좌굴의 경계에서 연성좌굴모드가 발생했다. 그러나 정현파형의 경우 전체좌굴이 발생하는 구간에서 연성좌굴모드가 발생하는 양상을 보였다. 또한 국부좌굴 구간에는 제형형상이 그리고 전체좌굴 구간에서는 정현파형상이 전단좌굴에 저항하는데 유리하게 작용하였다.