http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
내풍설계를 위한 초고층 무량판 건축물의 횡강성 및 고유주기 산정
박제우,김홍진,조지성,Park, Je-Woo,Kim, Hong-Jin,Jo, Ji-Seong 한국전산구조공학회 2010 한국전산구조공학회논문집 Vol.23 No.1
건축물의 풍진동은 건축물의 사용성평가에 중요한 구조설계 요인 중 하나이다. 신뢰성있는 풍하중 및 풍진동을 구하기 위해서는 정확한 고유주기의 예측이 필요하며 이러한 고유주기에 오차가 있을 경우 하중을 과대 또는 과소평가하게 되는 문제를 유발한다. 본 논문에서는 최근 본격적으로 증가하고 있는 초고층 무량판 구조시스템의 건축물에 대하여 계측을 통한 횡강성 산정식의 유효성을 검정하였다. 이를 위하여 최근 건설된 초고층 무량판 구조시스템이 적용된 3개의 건물에 대하여 계측 결과와 해석 모델의 고유주기를 비교 분석하였다. 이때, 무량판 구조물의 횡강성에 영향을 미치는 요인들에 대하여 각 케이스별로 해석을 수행하였으며, 특히 일반적으로 사용되고 있는 콘크리트의 할선탄성계수와 동탄성계수가 적용 되었을 때의 구조물의 고유주기 변화를 비교하였다. 그 결과 풍진동에 의한 건물의 변형률은 매우 적기 때문에 할선탄성계수의 적용보다는 동탄성계수의 적용이 보다 정확한 해석의 결과를 가져올 것으로 판단된다. Wind-induced vibration is one of the important structural design factors for serviceability of tall buildings. In order to evaluate the reliable wind-loads and wind induced-vibration, it is necessary to obtain the exact natural period of buildings. The discrepancy in the natural period estimation often results in the overestimation of wind loads. In this study, the effectiveness of lateral stiffness estimation method for tall buildings with flat plate system is evaluated. For this purposed, the results of finite element analysis of three recently constructed buildings are compared with those obtained from field measurement. For the analysis, factors affecting on the lateral resistance such as cracked stiffness of vertical members, elastic modulus of concrete, effective slab width, and cracked stiffness of link beam are considered. Form the results, it is found that the use of non-cracked stiffness and application of dynamic modulus of elasticity rather than initial secant modulus yields closer analysis result to the as-built period.
경량바닥판의 진동해석을 위한 유한요소모델링 및 실험검증
박제우(Park, Je-Woo),김홍진(Kim, Hong-Jin),조봉호(Cho, Bong-Ho),하태휴(Ha, Tae-Hyu) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.10
Due to the lack of design standard and the difficulty of analysis, the vibration analysis of lightweight floors has received less attention than typical structural analysis. In this paper, the finite element model for lightweight floors is presented based on rigid link and realistic support restraints. The rigid rink is used to solve the problem of difference in the centroid of beam, joist, and flooring material and to guarantee the same behavior of those members. Two different support restrains, all fixed restraint and mixture of fixed and released restraint, are used in the analysis. The finite element model is verified through the impact loading test of the real scale floors that have different joist condition and middle beam. The finite element analysis results indicate that the different joists having same moment of inertia yield similar natural frequencies, while the test results of real scale floors shows that the closed shaped joist floor yields higher natural frequency than the open shaped joist floor. The test results also indicate that the finite element analysis using the mixture of fixed and released support restraint yields closer natural frequencies to those of actual floors.
박제우(Park Je-Woo),김흥진(Kim Hong-Jin),이광재(Lee Kwang-Jae),김대근(Kim Dai-Keun),조지성(Jo Ji-Seong) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
Increasing heights of tall buildings often require supplementary damping system for occupant comfort in windy condition. This paper presents a liquid column vibration absorber (LCVA) installed in a 64-story building, which is the highest residential building with flat plate structural system in Korea, for mitigation of wind-induced motion. LCVA is a special type of secondary mass-type dampers relying on the motion of a column of liquid in a U-shaped container to counteract the forces acting on the structure. Since it has different dimensions for vertical and horizontal portions of container, it has benefits of easy tuning and wide natural frequency range. To evaluate the control performance of LCVA, an experiment using 1/20 scaled model is performed. The test structure is excited using a sinusoidal signal ranging 0.1~3.0㎐ with 5.5㎜ displacement, and acceleration and displacement of the structure, water height, and shear force are measured. Experiment results indicate that the LCVA increase the energy dissipation capacity of the building significantly
박제우(Park Je-Woo),김홍진(Kim Hong-Jin),조봉호(Cho Bong-Ho),하태휴(Ha Tae-Hyu) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
In this paper, the finite element model for lightweight floors is presented based on rigid link and realistic support restraints. Two different support restrains, all fixed restraint and mixture of fixed and released restraint, are used in the analysis. The finite element analysis results indicate that the different joists having same moment of inertia yield similar natural frequencies, while the test results of real scale floors shows that the closed shaped joist floor yields higher natural frequency than the open shaped joist floor. The test results also indicate that the finite element analysis using the mixture of fixed and released support restraint yields closer natural frequencies to those of actual floors.
장영주(Jang Young-Ju),박제우(Park Je-Woo),이지훈(Lee Jee-Hoon),김홍진(Kim Hong-Jin) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
This paper is concerned with comparisons of dynamic property by transient vibration and synchronized human excitation. Dynamic property including damping ratio and natural frequency is very important data of stability and usability of building. To obtain the reliability data, experiments were conducted to six buildings ranging from four to twelve stories. Dynamic property was analyzed by measuring transient vibration and synchronized human excitation using natural frequency of building. The synchronized human excitation measurement is finding dynamic property from obtained through free vibration wave after sympathy by human excitation using natural frequency of building. From the analyzed results, synchronized human excitation was more reliable data than transient vibration measurement about first mode.
경량철골 바닥판의 설계요인 및 실험변수에 따른 바닥진동성능 비교
김덕기(Kim, Deok-Ki),박제우(Park, Je-Woo),김홍진(Kim, Hong-Jin),하태휴(Ha, Tae-Hyu) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.7
Since the natural frequency and damping ratio of the light weight steel floor are lower than those of the reinforced concrete floor, the floor vibration due to a dynamic load is significant and the serviceability issue becomes more critical. In this paper, the floor vibration performance of the light weight steel floor is evaluated for different design factors. The impact loading test and walking test were performed on the floor specimen built with different design factors. The acceleration data obtained from tests were analyzed to obtain the natural frequency and damping ratio of the specimen, and the effect of design factors on the floor stiffness and vibration are evaluated. Further, the effect of variables of walking test method on the floor vibration performance is also evaluated. The floor vibration performance is evaluated using AISC design guide and AIJ design guide. The results indicate that the connection between the upper and lower beams due to wall construction increases the stiffness and the natural frequency of the entire floor and thereby improves the floor vibration performance. However, the installation of floor heating system and furniture do not effect on the floor vibration performance considerably.
무선 MEMS 센서의 구조물 식별 적용성을 위한 유효성 평가
김병용(Kim Boung-Yong),김홍진(Kim Hong-Jin),박제우(Park Je-Woo),김화중(Kim Wha-Jung) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
A great interest has been rising on securing safety and the maintenance of structures in the civil engineering and construction fields due to the increase in the number of large structures and social infrastructures as well as collapses of bridges and high rise buildings. MEMS (Micro-Electro-Mechanical System), one of the technologies that are rapidly applied to the evaluation of the integrity of structures, has advantages of being adequate for wireless monitoring owing to the low cost and low electricity consumption, easily installed, and economical because of lower cost to install than the existing wire accelerometers. In this paper, the evaluation of the integrity of structures has been conducted, based on the wireless system and using the features of shaking table and a shear building. The effectiveness of wireless MEMS system has been verified by comparing the results of the evaluations of MEMS accelerometer and traditional accelerometer.